From d8db5299fae13a5ef321fd8f7be7364d735fecbb Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Wed, 17 Oct 2018 00:47:28 +0200
Subject: [PATCH 1/3] Don't buffer lints.

When lints are emitted from the AST borrow checker, they do not signal
an error as it is not known at that time whether, due to attributes,
that lint will error or warn. This means that when lints are buffered
in the MIR they will always be downgraded, as the AST borrowck will not
have been marked as having errored, even if a lint was upgraded to
an error after being emitted from the AST borrowck. The simple solution
to this is to not buffer any lints from the MIR borrowck.
---
 src/librustc_mir/borrow_check/mod.rs | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/librustc_mir/borrow_check/mod.rs b/src/librustc_mir/borrow_check/mod.rs
index 9cbaf35acd33..fe80447e4a84 100644
--- a/src/librustc_mir/borrow_check/mod.rs
+++ b/src/librustc_mir/borrow_check/mod.rs
@@ -321,20 +321,20 @@ fn do_mir_borrowck<'a, 'gcx, 'tcx>(
                 continue;
             }
 
-            let mut err = tcx.struct_span_lint_node(
+            let mut_span = tcx.sess.source_map().span_until_non_whitespace(span);
+            tcx.struct_span_lint_node(
                 UNUSED_MUT,
                 vsi[local_decl.source_info.scope].lint_root,
                 span,
                 "variable does not need to be mutable",
-            );
-            let mut_span = tcx.sess.source_map().span_until_non_whitespace(span);
-            err.span_suggestion_short_with_applicability(
+            )
+            .span_suggestion_short_with_applicability(
                 mut_span,
                 "remove this `mut`",
                 String::new(),
-                Applicability::MachineApplicable);
-
-            err.buffer(&mut mbcx.errors_buffer);
+                Applicability::MachineApplicable,
+            )
+            .emit();
         }
     }
 

From 8b34881e972906545d030318006478c1986fa0aa Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Wed, 17 Oct 2018 00:51:05 +0200
Subject: [PATCH 2/3] Change NLL compare mode to borrowck=migrate.

This commit changes the NLL compare mode to pass `-Z borrowck=migrate`
rather than `-Z borrowck=nll` to better test what will be deployed. It
does not include the test output updates, as separation of these commits
makes reviewing simpler.
---
 src/tools/compiletest/src/runtest.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 4cb6f6b83bdd..c69956030c0b 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -1810,7 +1810,7 @@ impl<'test> TestCx<'test> {
 
         match self.config.compare_mode {
             Some(CompareMode::Nll) => {
-                rustc.args(&["-Zborrowck=mir", "-Ztwo-phase-borrows"]);
+                rustc.args(&["-Zborrowck=migrate", "-Ztwo-phase-borrows"]);
             }
             Some(CompareMode::Polonius) => {
                 rustc.args(&["-Zpolonius", "-Zborrowck=mir", "-Ztwo-phase-borrows"]);

From 539404b77d1e443793c653ae03b207c62b3b1ae0 Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Wed, 17 Oct 2018 00:57:32 +0200
Subject: [PATCH 3/3] Update output for borrowck=migrate compare mode.

This commit updates the test output for the updated NLL compare mode
that uses `-Z borrowck=migrate` rather than `-Z borrowck=mir`. The
previous commit changes `compiletest` and this commit only updates
`.nll.stderr` files.
---
 .../ui/access-mode-in-closures.nll.stderr     |  14 ++-
 ...es-project-from-hrtb-in-fn-body.nll.stderr |  24 ----
 .../associated-types-subtyping-1.nll.stderr   |  24 ----
 ...fn-ret-contravariant.krisskross.nll.stderr |  24 ----
 ...-fn-ret-contravariant.transmute.nll.stderr |  20 ----
 ...ect-fn-ret-invariant.krisskross.nll.stderr |  24 ----
 ...project-fn-ret-invariant.oneuse.nll.stderr |  24 ----
 ...ject-fn-ret-invariant.transmute.nll.stderr |  22 ----
 .../ui/binop/binop-move-semantics.nll.stderr  |  14 ++-
 .../borrowck-closures-unique.nll.stderr       |   8 +-
 .../borrowck-describe-lvalue.ast.nll.stderr   |  19 +++-
 .../borrowck-fn-in-const-a.ast.nll.stderr     |  20 ++++
 ...or-loop-correct-cmt-for-pattern.nll.stderr |  32 +++++-
 .../ui/borrowck/borrowck-in-static.nll.stderr |  17 ++-
 .../borrowck/borrowck-issue-2657-2.nll.stderr |  13 ++-
 .../borrowck-move-error-with-note.nll.stderr  |  50 ++++++++-
 .../borrowck-move-from-unsafe-ptr.nll.stderr  |  13 ++-
 ...orrowck-move-in-irrefut-pat.ast.nll.stderr |  29 ++++-
 ...ut-of-overloaded-auto-deref.ast.nll.stderr |  11 +-
 ...ck-move-out-of-overloaded-deref.nll.stderr |  11 +-
 ...wck-move-out-of-static-item.ast.nll.stderr |  18 +++
 .../borrowck-move-out-of-vec-tail.nll.stderr  |  29 ++++-
 ...-overloaded-index-move-from-vec.nll.stderr |  11 +-
 ...orrow-from-shorter-lived-andmut.nll.stderr |  12 --
 src/test/ui/borrowck/issue-51415.nll.stderr   |  11 +-
 src/test/ui/borrowck/issue-7573.nll.stderr    |  14 ---
 ...tic-initializer-issue-38520.ast.nll.stderr |  33 ++++++
 .../ui/borrowck/mutability-errors.nll.stderr  |  26 ++++-
 .../regions-escape-bound-fn-2.nll.stderr      |  12 --
 .../regions-escape-bound-fn.nll.stderr        |  12 --
 .../regions-escape-unboxed-closure.nll.stderr |  12 --
 ...upvar-from-non-once-ref-closure.nll.stderr |  21 +++-
 .../ui/by-move-pattern-binding.nll.stderr     |  11 +-
 ...check-static-values-constraints.nll.stderr |  11 +-
 .../expect-fn-supply-fn.nll.stderr            |  54 ---------
 ...ds-static-cant-capture-borrowed.nll.stderr |  29 -----
 .../expect-region-supply-region.nll.stderr    |  34 ------
 .../min_const_fn/min_const_fn.nll.stderr      |   7 +-
 .../min_const_fn/min_const_fn_dyn.nll.stderr  |   7 +-
 src/test/ui/dst/dst-index.nll.stderr          |  20 +++-
 src/test/ui/dst/dst-rvalue.nll.stderr         |  22 +++-
 src/test/ui/error-codes/E0507.nll.stderr      |  18 +++
 ...1-does-not-trigger-for-closures.nll.stderr |  11 --
 ..._type_does_not_live_long_enough.nll.stderr |  12 --
 ...ubtype.free_inv_x_vs_free_inv_y.nll.stderr |  30 -----
 .../hr-subtype.free_x_vs_free_y.nll.stderr    |  16 ---
 .../dyn-trait.nll.stderr                      |  10 --
 ...t_outlive_least_region_or_bound.nll.stderr |  49 --------
 .../static-return-lifetime-infered.nll.stderr |  26 -----
 .../type_parameters_captured.nll.stderr       |  11 --
 .../in-band-lifetimes/mismatched.nll.stderr   |  20 ----
 src/test/ui/issues/issue-10291.nll.stderr     |  11 --
 src/test/ui/issues/issue-12567.nll.stderr     |  41 ++++++-
 src/test/ui/issues/issue-13058.nll.stderr     |  12 --
 src/test/ui/issues/issue-15034.nll.stderr     |  11 --
 src/test/ui/issues/issue-16683.nll.stderr     |  10 --
 .../issues/issue-17718-static-move.nll.stderr |  11 +-
 src/test/ui/issues/issue-17728.nll.stderr     |  19 ----
 src/test/ui/issues/issue-17758.nll.stderr     |  10 --
 src/test/ui/issues/issue-20801.nll.stderr     |  20 +++-
 src/test/ui/issues/issue-2590.nll.stderr      |  13 ++-
 src/test/ui/issues/issue-26217.nll.stderr     |   9 --
 src/test/ui/issues/issue-30355.nll.stderr     |  13 ++-
 src/test/ui/issues/issue-40288-2.nll.stderr   |  21 ----
 .../issue-40402-1.nll.stderr                  |  11 +-
 .../issue-40402-2.nll.stderr                  |  20 +++-
 src/test/ui/issues/issue-40510-1.nll.stderr   |  11 +-
 src/test/ui/issues/issue-40510-3.nll.stderr   |  11 +-
 src/test/ui/issues/issue-4335.nll.stderr      |  11 +-
 src/test/ui/issues/issue-49824.nll.stderr     |  17 ++-
 src/test/ui/issues/issue-52213.nll.stderr     |  13 ---
 src/test/ui/issues/issue-52533-1.nll.stderr   |  11 --
 src/test/ui/issues/issue-52533.nll.stderr     |  11 --
 .../kindck/kindck-impl-type-params.nll.stderr |  63 -----------
 .../ui/kindck/kindck-send-object1.nll.stderr  |  32 ------
 ...etime-bound-will-change-warning.nll.stderr |  20 ----
 ...xisting-name-if-else-using-impl.nll.stderr |  13 ---
 ...isting-name-return-type-is-anon.nll.stderr |  13 ---
 ...-one-existing-name-self-is-anon.nll.stderr |  13 ---
 .../ex2a-push-one-existing-name-2.nll.stderr  |  11 --
 ...h-one-existing-name-early-bound.nll.stderr |  12 --
 .../ex2a-push-one-existing-name.nll.stderr    |  11 --
 .../ex2b-push-no-existing-names.nll.stderr    |  12 --
 .../ex2c-push-inference-variable.nll.stderr   |  13 ---
 .../ex2d-push-inference-variable-2.nll.stderr |  13 ---
 .../ex2e-push-inference-variable-3.nll.stderr |  13 ---
 .../ex3-both-anon-regions-2.nll.stderr        |  12 --
 .../ex3-both-anon-regions-3.nll.stderr        |  22 ----
 ...anon-regions-both-are-structs-2.nll.stderr |  12 --
 ...anon-regions-both-are-structs-3.nll.stderr |  13 ---
 ...-are-structs-earlybound-regions.nll.stderr |  13 ---
 ...h-are-structs-latebound-regions.nll.stderr |  12 --
 ...h-anon-regions-both-are-structs.nll.stderr |  12 --
 ...-anon-regions-latebound-regions.nll.stderr |  12 --
 ...th-anon-regions-one-is-struct-2.nll.stderr |  21 ----
 ...th-anon-regions-one-is-struct-3.nll.stderr |  12 --
 ...th-anon-regions-one-is-struct-4.nll.stderr |  12 --
 ...both-anon-regions-one-is-struct.nll.stderr |  12 --
 ...non-regions-return-type-is-anon.nll.stderr |  12 --
 ...-both-anon-regions-self-is-anon.nll.stderr |  12 --
 ...oth-anon-regions-using-fn-items.nll.stderr |  21 ----
 ...h-anon-regions-using-impl-items.nll.stderr |  12 --
 ...non-regions-using-trait-objects.nll.stderr |  21 ----
 .../ex3-both-anon-regions.nll.stderr          |  12 --
 src/test/ui/lub-if.nll.stderr                 |  20 ----
 src/test/ui/lub-match.nll.stderr              |  20 ----
 .../match/match-ref-mut-invariance.nll.stderr |  12 --
 .../match-ref-mut-let-invariance.nll.stderr   |  13 ---
 .../moves-based-on-type-block-bad.nll.stderr  |  14 ++-
 ...e-out-of-closure-env-issue-1965.nll.stderr |  17 ++-
 .../ui/nll/cannot-move-block-spans.nll.stderr |  72 +++++++++++-
 .../match-guards-always-borrow.ast.nll.stderr |  30 ++++-
 ...where-clause-env-wrong-lifetime.nll.stderr |  11 --
 ...object-lifetime-default-elision.nll.stderr |  13 ---
 ...lifetime-default-from-box-error.nll.stderr |  28 -----
 ...ime-default-from-rptr-box-error.nll.stderr |  10 --
 ...-default-from-rptr-struct-error.nll.stderr |  10 --
 .../object-lifetime-default-mybox.nll.stderr  |  21 ----
 ...nvariant-static-error-reporting.nll.stderr |  11 --
 ...time-bounds-on-fns-where-clause.nll.stderr |  12 --
 ...time-bounds-on-fns-where-clause.nll.stderr |  12 --
 .../region-object-lifetime-2.nll.stderr       |  12 --
 .../region-object-lifetime-4.nll.stderr       |  12 --
 ...ion-object-lifetime-in-coercion.nll.stderr |  38 -------
 .../regions/regions-addr-of-self.nll.stderr   |  10 --
 .../regions-addr-of-upvar-self.nll.stderr     |  47 --------
 ...n-supertrait-outlives-container.nll.stderr |  13 ---
 ...unded-by-trait-requiring-static.nll.stderr |  50 ---------
 ...hod-type-parameters-cross-crate.nll.stderr |  13 ---
 ...hod-type-parameters-trait-bound.nll.stderr |  13 ---
 ...-bounded-method-type-parameters.nll.stderr |  19 ----
 src/test/ui/regions/regions-bounds.nll.stderr |  22 ----
 ...ose-associated-type-into-object.nll.stderr |  36 ------
 ...ions-close-object-into-object-2.nll.stderr |  21 ----
 ...ions-close-object-into-object-4.nll.stderr |  38 -------
 ...ions-close-object-into-object-5.nll.stderr |  31 -----
 ...ons-close-over-type-parameter-1.nll.stderr |  20 ----
 ...se-over-type-parameter-multiple.nll.stderr |  11 --
 ...regions-close-param-into-object.nll.stderr |  36 ------
 .../regions-creating-enums3.nll.stderr        |  12 --
 .../regions-creating-enums4.nll.stderr        |  12 --
 ...egions-early-bound-error-method.nll.stderr |  12 --
 .../regions-early-bound-error.nll.stderr      |  12 --
 .../regions/regions-escape-method.nll.stderr  |  11 --
 ...regions-escape-via-trait-or-not.nll.stderr |  11 --
 ...ons-free-region-ordering-callee.nll.stderr |  24 ----
 ...ons-free-region-ordering-caller.nll.stderr |  33 ------
 ...-free-region-ordering-incorrect.nll.stderr |  15 ---
 ...implied-bounds-projection-gap-1.nll.stderr |  11 --
 ...ons-infer-bound-from-trait-self.nll.stderr |  11 --
 .../regions-infer-bound-from-trait.nll.stderr |  19 ----
 .../regions/regions-infer-call-3.nll.stderr   |  11 --
 ...nfer-contravariance-due-to-decl.nll.stderr |  13 ---
 ...ns-infer-covariance-due-to-decl.nll.stderr |  13 ---
 ...ns-infer-invariance-due-to-decl.nll.stderr |  10 --
 ...-invariance-due-to-mutability-3.nll.stderr |  10 --
 ...-invariance-due-to-mutability-4.nll.stderr |  10 --
 .../regions-infer-not-param.nll.stderr        |  26 -----
 .../regions-infer-paramd-indirect.nll.stderr  |  13 ---
 .../regions-lifetime-bounds-on-fns.nll.stderr |  12 --
 .../ui/regions/regions-nested-fns.nll.stderr  |  49 --------
 ...lives-projection-container-hrtb.nll.stderr |   9 --
 ...utlives-projection-container-wc.nll.stderr |  13 ---
 ...s-outlives-projection-container.nll.stderr |  46 --------
 ...ow-from-shorter-mut-ref-mut-ref.nll.stderr |  12 --
 ...s-reborrow-from-shorter-mut-ref.nll.stderr |  12 --
 .../regions/regions-ret-borrowed-1.nll.stderr |  11 --
 .../regions/regions-ret-borrowed.nll.stderr   |  11 --
 ...return-ref-to-upvar-issue-17403.nll.stderr |  13 ---
 .../regions-static-bound.ll.nll.stderr        |  49 --------
 .../regions-trait-object-subtyping.nll.stderr |  24 ----
 ...se-covariant-in-second-position.nll.stderr |  13 ---
 ...nce-contravariant-use-covariant.nll.stderr |  13 ---
 ...nce-covariant-use-contravariant.nll.stderr |  13 ---
 ...nce-invariant-use-contravariant.nll.stderr |  13 ---
 ...ariance-invariant-use-covariant.nll.stderr |  11 --
 .../static/static-items-cant-move.nll.stderr  |  18 +++
 src/test/ui/std-uncopyable-atomics.nll.stderr |  38 ++++++-
 src/test/ui/thread-local-in-ctfe.nll.stderr   |  14 ++-
 .../trivial-bounds-leak-copy.nll.stderr       |  20 ++++
 .../unboxed-closure-illegal-move.nll.stderr   |  32 +++++-
 ...boxed-closure-immutable-capture.nll.stderr |  26 ++++-
 ...ument-types-two-region-pointers.nll.stderr |  12 --
 ...nfer-fnmut-calling-fnmut-no-mut.nll.stderr |   8 +-
 .../unboxed-closures-mutate-upvar.nll.stderr  |   8 +-
 .../dyn-trait-underscore.nll.stderr           |  11 --
 ...rscore-lifetime-elison-mismatch.nll.stderr |  11 --
 src/test/ui/unop-move-semantics.nll.stderr    |  14 ++-
 .../variance-btree-invariant-types.nll.stderr | 106 ------------------
 .../variance-cell-is-invariant.nll.stderr     |  13 ---
 ...riance-contravariant-arg-object.nll.stderr |  24 ----
 ...e-contravariant-arg-trait-match.nll.stderr |  24 ----
 ...-contravariant-self-trait-match.nll.stderr |  24 ----
 .../variance-covariant-arg-object.nll.stderr  |  24 ----
 ...iance-covariant-arg-trait-match.nll.stderr |  24 ----
 ...ance-covariant-self-trait-match.nll.stderr |  24 ----
 .../variance-invariant-arg-object.nll.stderr  |  24 ----
 ...iance-invariant-arg-trait-match.nll.stderr |  24 ----
 ...ance-invariant-self-trait-match.nll.stderr |  24 ----
 .../variance-trait-matching.nll.stderr        |  12 --
 ...ance-use-contravariant-struct-1.nll.stderr |  13 ---
 ...variance-use-covariant-struct-1.nll.stderr |  13 ---
 ...variance-use-invariant-struct-1.nll.stderr |  24 ----
 src/test/ui/wf/wf-static-method.nll.stderr    |  55 ---------
 204 files changed, 920 insertions(+), 2958 deletions(-)
 delete mode 100644 src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
 delete mode 100644 src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr
 create mode 100644 src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr
 create mode 100644 src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr
 delete mode 100644 src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr
 delete mode 100644 src/test/ui/borrowck/issue-7573.nll.stderr
 create mode 100644 src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr
 delete mode 100644 src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr
 delete mode 100644 src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr
 delete mode 100644 src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr
 delete mode 100644 src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr
 delete mode 100644 src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr
 delete mode 100644 src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr
 create mode 100644 src/test/ui/error-codes/E0507.nll.stderr
 delete mode 100644 src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr
 delete mode 100644 src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr
 delete mode 100644 src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr
 delete mode 100644 src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr
 delete mode 100644 src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr
 delete mode 100644 src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr
 delete mode 100644 src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr
 delete mode 100644 src/test/ui/impl-trait/type_parameters_captured.nll.stderr
 delete mode 100644 src/test/ui/in-band-lifetimes/mismatched.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-10291.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-13058.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-15034.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-16683.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-17728.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-17758.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-26217.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-40288-2.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-52213.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-52533-1.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-52533.nll.stderr
 delete mode 100644 src/test/ui/kindck/kindck-impl-type-params.nll.stderr
 delete mode 100644 src/test/ui/kindck/kindck-send-object1.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr
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 delete mode 100644 src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr
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 delete mode 100644 src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr
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 create mode 100644 src/test/ui/static/static-items-cant-move.nll.stderr
 create mode 100644 src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr
 delete mode 100644 src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr
 delete mode 100644 src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr
 delete mode 100644 src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-btree-invariant-types.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-cell-is-invariant.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-contravariant-arg-object.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr
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 delete mode 100644 src/test/ui/variance/variance-covariant-arg-object.nll.stderr
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 delete mode 100644 src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-invariant-arg-object.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-trait-matching.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr
 delete mode 100644 src/test/ui/wf/wf-static-method.nll.stderr

diff --git a/src/test/ui/access-mode-in-closures.nll.stderr b/src/test/ui/access-mode-in-closures.nll.stderr
index b9de60f43f70..3366f0639caa 100644
--- a/src/test/ui/access-mode-in-closures.nll.stderr
+++ b/src/test/ui/access-mode-in-closures.nll.stderr
@@ -13,6 +13,18 @@ note: move occurs because `v` has type `std::vec::Vec<isize>`, which does not im
 LL |         match *s { sty(v) => v } //~ ERROR cannot move out
    |                        ^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `s.0` which is behind a `&` reference
+  --> $DIR/access-mode-in-closures.rs:19:24
+   |
+LL |     let _foo = unpack(|s| {
+   |                        - help: consider changing this to be a mutable reference: `&mut sty`
+LL |         // Test that `s` is moved here.
+LL |         match *s { sty(v) => v } //~ ERROR cannot move out
+   |                        ^
+   |                        |
+   |                        cannot move out of `s.0` which is behind a `&` reference
+   |                        `s` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr b/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
deleted file mode 100644
index 674d85d95911..000000000000
--- a/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:32:29
-   |
-LL | fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |     let z: I::A = if cond { x } else { y };
-   |                             ^ assignment requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:32:40
-   |
-LL | fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |     let z: I::A = if cond { x } else { y };
-   |                                        ^ assignment requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr b/src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
deleted file mode 100644
index 1156c773b8c5..000000000000
--- a/src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-subtyping-1.rs:36:13
-   |
-LL | fn method2<'a,'b,T>(x: &'a T, y: &'b T)
-   |            -- -- lifetime `'b` defined here
-   |            |
-   |            lifetime `'a` defined here
-...
-LL |     let _c: <T as Trait<'b>>::Type = a; //~ ERROR E0623
-   |             ^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-subtyping-1.rs:44:12
-   |
-LL | fn method3<'a,'b,T>(x: &'a T, y: &'b T)
-   |            -- -- lifetime `'b` defined here
-   |            |
-   |            lifetime `'a` defined here
-...
-LL |     let b: <T as Trait<'b>>::Type = make_any();
-   |            ^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr
deleted file mode 100644
index 044a3f70b4a6..000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:55:4
-   |
-LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR 55:5: 55:6: lifetime mismatch [E0623]
-   |    ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:55:4
-   |
-LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR 55:5: 55:6: lifetime mismatch [E0623]
-   |    ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr
deleted file mode 100644
index 10f70b525e05..000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:48:4
-   |
-LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
-   |        -- lifetime `'a` defined here
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:48:4
-   |
-LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr
deleted file mode 100644
index 1cb687856942..000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:65:4
-   |
-LL | fn transmute<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR E0623
-   |    ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:65:4
-   |
-LL | fn transmute<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR E0623
-   |    ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr
deleted file mode 100644
index a9c2bb376398..000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:48:12
-   |
-LL | fn baz<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |    let f = foo; // <-- No consistent type can be inferred for `f` here.
-LL |    let a = bar(f, x);
-   |            ^^^^^^^^^ argument requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:49:12
-   |
-LL | fn baz<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |    let b = bar(f, y); //[oneuse]~ ERROR 49:19: 49:20: lifetime mismatch [E0623]
-   |            ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr
deleted file mode 100644
index 2329adb5deab..000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr
+++ /dev/null
@@ -1,22 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:58:4
-   |
-LL | fn baz<'a,'b>(x: Type<'a>) -> Type<'static> {
-   |        -- lifetime `'a` defined here
-...
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:58:4
-   |
-LL | fn baz<'a,'b>(x: Type<'a>) -> Type<'static> {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/binop/binop-move-semantics.nll.stderr b/src/test/ui/binop/binop-move-semantics.nll.stderr
index 545a60f6770d..94676f0e5ad7 100644
--- a/src/test/ui/binop/binop-move-semantics.nll.stderr
+++ b/src/test/ui/binop/binop-move-semantics.nll.stderr
@@ -32,6 +32,18 @@ error[E0507]: cannot move out of borrowed content
 LL |     *n;  //~ ERROR: cannot move out of borrowed content
    |     ^^ cannot move out of borrowed content
 
+error[E0507]: cannot move out of `*n` which is behind a `&` reference
+  --> $DIR/binop-move-semantics.rs:42:5
+   |
+LL |     let n = &y;
+   |             -- help: consider changing this to be a mutable reference: `&mut y`
+...
+LL |     *n;  //~ ERROR: cannot move out of borrowed content
+   |     ^^
+   |     |
+   |     cannot move out of `*n` which is behind a `&` reference
+   |     `n` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0502]: cannot borrow `f` as immutable because it is also borrowed as mutable
   --> $DIR/binop-move-semantics.rs:64:5
    |
@@ -62,7 +74,7 @@ LL | |     &mut f;  //~ ERROR: cannot borrow `f` as mutable because it is also b
    |       |    immutable borrow later used here
    |       mutable borrow occurs here
 
-error: aborting due to 6 previous errors
+error: aborting due to 7 previous errors
 
 Some errors occurred: E0382, E0502, E0507.
 For more information about an error, try `rustc --explain E0382`.
diff --git a/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr b/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr
index 231ae53fe82b..771ef88a662b 100644
--- a/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr
@@ -40,15 +40,19 @@ LL |     let c2 = || set(x); //~ ERROR two closures require unique access to `x`
 LL |     c1;
    |     -- first borrow later used here
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/borrowck-closures-unique.rs:57:38
    |
 LL | fn e(x: &'static mut isize) {
    |      - help: consider changing this to be mutable: `mut x`
 LL |     let c1 = |y: &'static mut isize| x = y; //~ ERROR closure cannot assign to immutable argument
    |                                      ^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
 
 Some errors occurred: E0500, E0524, E0594.
 For more information about an error, try `rustc --explain E0500`.
diff --git a/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr b/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr
index 5721c52ba217..88ae73b6368e 100644
--- a/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr
@@ -20,7 +20,7 @@ LL |                    //[mir]~^ ERROR cannot borrow `x` as mutable more than o
 LL |                    *y = 1;
    |                    ------ first borrow later used here
 
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/borrowck-describe-lvalue.rs:305:16
    |
 LL |              || {
@@ -36,6 +36,9 @@ LL | |                 }
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0503]: cannot use `f.x` because it was mutably borrowed
   --> $DIR/borrowck-describe-lvalue.rs:53:9
@@ -339,7 +342,7 @@ LL |             &[_, F {x: ref xf, ..}] => println!("{}", xf),
 LL |         drop(x);
    |              - mutable borrow later used here
 
-error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
+warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
   --> $DIR/borrowck-describe-lvalue.rs:245:29
    |
 LL |             let x = &mut block;
@@ -349,8 +352,12 @@ LL |             let p: &'a u8 = &*block.current;
 ...
 LL |             drop(x);
    |                  - mutable borrow later used here
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
+warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
   --> $DIR/borrowck-describe-lvalue.rs:260:33
    |
 LL |             let x = &mut block;
@@ -360,6 +367,10 @@ LL |             let p : *const u8 = &*(*block).current;
 ...
 LL |             drop(x);
    |                  - mutable borrow later used here
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0382]: use of moved value: `x`
   --> $DIR/borrowck-describe-lvalue.rs:318:22
@@ -371,7 +382,7 @@ LL |                 drop(x); //[ast]~ ERROR use of moved value: `x`
    |
    = note: move occurs because `x` has type `std::vec::Vec<i32>`, which does not implement the `Copy` trait
 
-error: aborting due to 32 previous errors
+error: aborting due to 29 previous errors
 
 Some errors occurred: E0382, E0499, E0502, E0503.
 For more information about an error, try `rustc --explain E0382`.
diff --git a/src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr b/src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr
new file mode 100644
index 000000000000..b171a48ac508
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr
@@ -0,0 +1,20 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/borrowck-fn-in-const-a.rs:19:16
+   |
+LL |         return *x //[ast]~ ERROR cannot move out of borrowed content [E0507]
+   |                ^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of `*x` which is behind a `&` reference
+  --> $DIR/borrowck-fn-in-const-a.rs:19:16
+   |
+LL |     fn broken(x: &String) -> String {
+   |                  ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |         return *x //[ast]~ ERROR cannot move out of borrowed content [E0507]
+   |                ^^
+   |                |
+   |                cannot move out of `*x` which is behind a `&` reference
+   |                `x` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr b/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr
index 25eb69ad9377..0ab3d3ea5cdf 100644
--- a/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr
@@ -1,3 +1,13 @@
+error[E0507]: cannot move out of `*__next` which is behind a `&` reference
+  --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:22:10
+   |
+LL |     for &a in x.iter() {    //~ ERROR cannot move out
+   |         -^
+   |         ||
+   |         |cannot move out of `*__next` which is behind a `&` reference
+   |         |`__next` is a `&` reference, so the data it refers to cannot be moved
+   |         help: consider changing this to be a mutable reference: `&mut a`
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:22:15
    |
@@ -13,6 +23,16 @@ note: move occurs because `a` has type `&mut i32`, which does not implement the
 LL |     for &a in x.iter() {    //~ ERROR cannot move out
    |          ^
 
+error[E0507]: cannot move out of `*__next` which is behind a `&` reference
+  --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:28:10
+   |
+LL |     for &a in &f.a {  //~ ERROR cannot move out
+   |         -^
+   |         ||
+   |         |cannot move out of `*__next` which is behind a `&` reference
+   |         |`__next` is a `&` reference, so the data it refers to cannot be moved
+   |         help: consider changing this to be a mutable reference: `&mut a`
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:28:15
    |
@@ -28,6 +48,16 @@ note: move occurs because `a` has type `std::boxed::Box<isize>`, which does not
 LL |     for &a in &f.a {  //~ ERROR cannot move out
    |          ^
 
+error[E0507]: cannot move out of `*__next` which is behind a `&` reference
+  --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:32:10
+   |
+LL |     for &a in x.iter() {    //~ ERROR cannot move out
+   |         -^
+   |         ||
+   |         |cannot move out of `*__next` which is behind a `&` reference
+   |         |`__next` is a `&` reference, so the data it refers to cannot be moved
+   |         help: consider changing this to be a mutable reference: `&mut a`
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:32:15
    |
@@ -43,6 +73,6 @@ note: move occurs because `a` has type `std::boxed::Box<i32>`, which does not im
 LL |     for &a in x.iter() {    //~ ERROR cannot move out
    |          ^
 
-error: aborting due to 3 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-in-static.nll.stderr b/src/test/ui/borrowck/borrowck-in-static.nll.stderr
index 45fa1764f702..ba42dc243637 100644
--- a/src/test/ui/borrowck/borrowck-in-static.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-in-static.nll.stderr
@@ -6,6 +6,21 @@ LL |     let x = Box::new(0);
 LL |     Box::new(|| x) //~ ERROR cannot move out of captured outer variable
    |                 ^ cannot move out of captured variable in an `Fn` closure
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `x`, as it is a captured variable in a `Fn` closure
+  --> $DIR/borrowck-in-static.rs:15:17
+   |
+LL |     Box::new(|| x) //~ ERROR cannot move out of captured outer variable
+   |                 ^
+   |                 |
+   |                 cannot move out of `x`, as it is a captured variable in a `Fn` closure
+   |                 cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/borrowck-in-static.rs:15:14
+   |
+LL |     Box::new(|| x) //~ ERROR cannot move out of captured outer variable
+   |              ^^^^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr b/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr
index cdbfab8bd054..0445a75d61a9 100644
--- a/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr
@@ -7,6 +7,17 @@ LL |         let _b = *y; //~ ERROR cannot move out
    |                  cannot move out of borrowed content
    |                  help: consider removing the `*`: `y`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `*y` which is behind a `&` reference
+  --> $DIR/borrowck-issue-2657-2.rs:17:18
+   |
+LL |       Some(ref y) => {
+   |            ----- help: consider changing this to be a mutable reference: `ref mut y`
+LL |         let _b = *y; //~ ERROR cannot move out
+   |                  ^^
+   |                  |
+   |                  cannot move out of `*y` which is behind a `&` reference
+   |                  `y` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr b/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr
index 2df520a936c9..99f69515a473 100644
--- a/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr
@@ -24,6 +24,42 @@ LL |                   num2) => (),
 LL |         Foo::Foo2(num) => (),
    |                   ^^^
 
+error[E0507]: cannot move out of `f.0` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:23:19
+   |
+LL |     let f = &Foo::Foo1(box 1, box 2);
+   |             ------------------------ help: consider changing this to be a mutable reference: `&mut Foo::Foo1(box 1, box 2)`
+...
+LL |         Foo::Foo1(num1,
+   |                   ^^^^
+   |                   |
+   |                   cannot move out of `f.0` which is behind a `&` reference
+   |                   `f` is a `&` reference, so the data it refers to cannot be moved
+
+error[E0507]: cannot move out of `f.1` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:24:19
+   |
+LL |     let f = &Foo::Foo1(box 1, box 2);
+   |             ------------------------ help: consider changing this to be a mutable reference: `&mut Foo::Foo1(box 1, box 2)`
+...
+LL |                   num2) => (),
+   |                   ^^^^
+   |                   |
+   |                   cannot move out of `f.1` which is behind a `&` reference
+   |                   `f` is a `&` reference, so the data it refers to cannot be moved
+
+error[E0507]: cannot move out of `f.0` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:25:19
+   |
+LL |     let f = &Foo::Foo1(box 1, box 2);
+   |             ------------------------ help: consider changing this to be a mutable reference: `&mut Foo::Foo1(box 1, box 2)`
+...
+LL |         Foo::Foo2(num) => (),
+   |                   ^^^
+   |                   |
+   |                   cannot move out of `f.0` which is behind a `&` reference
+   |                   `f` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0509]: cannot move out of type `S`, which implements the `Drop` trait
   --> $DIR/borrowck-move-error-with-note.rs:39:11
    |
@@ -61,7 +97,19 @@ note: move occurs because `n` has type `std::boxed::Box<isize>`, which does not
 LL |         n => {
    |         ^
 
-error: aborting due to 3 previous errors
+error[E0507]: cannot move out of `a.a` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:59:9
+   |
+LL |     let a = &A { a: box 1 };
+   |             --------------- help: consider changing this to be a mutable reference: `&mut A { a: box 1 }`
+...
+LL |         n => {
+   |         ^
+   |         |
+   |         cannot move out of `a.a` which is behind a `&` reference
+   |         `a` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 7 previous errors
 
 Some errors occurred: E0507, E0509.
 For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr b/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr
index c3a2180b9f08..83c5b82957de 100644
--- a/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr
@@ -7,6 +7,17 @@ LL |     let y = *x; //~ ERROR cannot move out of dereference of raw pointer
    |             cannot move out of dereference of raw pointer
    |             help: consider removing the `*`: `x`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `*x` which is behind a `*const` pointer
+  --> $DIR/borrowck-move-from-unsafe-ptr.rs:13:13
+   |
+LL | unsafe fn foo(x: *const Box<isize>) -> Box<isize> {
+   |                  ----------------- help: consider changing this to be a mutable pointer: `*mut std::boxed::Box<isize>`
+LL |     let y = *x; //~ ERROR cannot move out of dereference of raw pointer
+   |             ^^
+   |             |
+   |             cannot move out of `*x` which is behind a `*const` pointer
+   |             `x` is a `*const` pointer, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr b/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr
index 49c2ec0dcf4e..f22aca999498 100644
--- a/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr
@@ -14,6 +14,15 @@ note: move occurs because `_x` has type `std::string::String`, which does not im
 LL | fn arg_item(&_x: &String) {}
    |              ^^
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-in-irrefut-pat.rs:16:14
+   |
+LL | fn arg_item(&_x: &String) {}
+   |              ^^
+   |              |
+   |              cannot move out of data in a `&` reference
+   |              cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-move-in-irrefut-pat.rs:21:11
    |
@@ -30,6 +39,24 @@ note: move occurs because `_x` has type `std::string::String`, which does not im
 LL |     with(|&_x| ())
    |            ^^
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-in-irrefut-pat.rs:21:12
+   |
+LL |     with(|&_x| ())
+   |            ^^
+   |            |
+   |            cannot move out of data in a `&` reference
+   |            cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-in-irrefut-pat.rs:27:10
+   |
+LL |     let &_x = &"hi".to_string();
+   |          ^^
+   |          |
+   |          cannot move out of data in a `&` reference
+   |          cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-move-in-irrefut-pat.rs:27:15
    |
@@ -45,6 +72,6 @@ note: move occurs because `_x` has type `std::string::String`, which does not im
 LL |     let &_x = &"hi".to_string();
    |          ^^
 
-error: aborting due to 3 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr
index d58beabb3038..ba74cd2514e1 100644
--- a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr
@@ -4,6 +4,15 @@ error[E0507]: cannot move out of an `Rc`
 LL |     let _x = Rc::new(vec![1, 2]).into_iter();
    |              ^^^^^^^^^^^^^^^^^^^ cannot move out of an `Rc`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-out-of-overloaded-auto-deref.rs:17:14
+   |
+LL |     let _x = Rc::new(vec![1, 2]).into_iter();
+   |              ^^^^^^^^^^^^^^^^^^^
+   |              |
+   |              cannot move out of data in a `&` reference
+   |              cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr
index c9c8cf104ce2..205044bb3688 100644
--- a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr
@@ -7,6 +7,15 @@ LL |     let _x = *Rc::new("hi".to_string());
    |              cannot move out of an `Rc`
    |              help: consider removing the `*`: `Rc::new("hi".to_string())`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-out-of-overloaded-deref.rs:14:14
+   |
+LL |     let _x = *Rc::new("hi".to_string());
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |              |
+   |              cannot move out of data in a `&` reference
+   |              cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr
new file mode 100644
index 000000000000..675458d8c2b8
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr
@@ -0,0 +1,18 @@
+error[E0507]: cannot move out of static item
+  --> $DIR/borrowck-move-out-of-static-item.rs:28:10
+   |
+LL |     test(BAR); //[ast]~ ERROR cannot move out of static item [E0507]
+   |          ^^^ cannot move out of static item
+
+error[E0507]: cannot move out of immutable static item `BAR`
+  --> $DIR/borrowck-move-out-of-static-item.rs:28:10
+   |
+LL |     test(BAR); //[ast]~ ERROR cannot move out of static item [E0507]
+   |          ^^^
+   |          |
+   |          cannot move out of immutable static item `BAR`
+   |          cannot move
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr
index f3430ba4e06c..dea42c53992b 100644
--- a/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr
@@ -26,6 +26,31 @@ LL |                 //~| to prevent move
 LL |                   Foo { string: b }] => {
    |
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `tail[..].string` which is behind a `&` reference
+  --> $DIR/borrowck-move-out-of-vec-tail.rs:30:33
+   |
+LL |         [_, ref tail..] => {
+   |             -------- help: consider changing this to be a mutable reference: `ref mut tail`
+LL |             match tail {
+LL |                 &[Foo { string: a },
+   |                                 ^
+   |                                 |
+   |                                 cannot move out of `tail[..].string` which is behind a `&` reference
+   |                                 `tail` is a `&` reference, so the data it refers to cannot be moved
 
-For more information about this error, try `rustc --explain E0508`.
+error[E0507]: cannot move out of `tail[..].string` which is behind a `&` reference
+  --> $DIR/borrowck-move-out-of-vec-tail.rs:34:33
+   |
+LL |         [_, ref tail..] => {
+   |             -------- help: consider changing this to be a mutable reference: `ref mut tail`
+...
+LL |                   Foo { string: b }] => {
+   |                                 ^
+   |                                 |
+   |                                 cannot move out of `tail[..].string` which is behind a `&` reference
+   |                                 `tail` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 3 previous errors
+
+Some errors occurred: E0507, E0508.
+For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr b/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr
index 92e10c258c26..05fd6d71520c 100644
--- a/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr
@@ -7,6 +7,15 @@ LL |     let bad = v[0];
    |               cannot move out of borrowed content
    |               help: consider borrowing here: `&v[0]`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-overloaded-index-move-from-vec.rs:30:15
+   |
+LL |     let bad = v[0];
+   |               ^^^^
+   |               |
+   |               cannot move out of data in a `&` reference
+   |               cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr b/src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr
deleted file mode 100644
index e3211f838509..000000000000
--- a/src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/borrowck-reborrow-from-shorter-lived-andmut.rs:19:5
-   |
-LL | fn copy_borrowed_ptr<'a,'b>(p: &'a mut S<'b>) -> S<'b> {
-   |                      -- -- lifetime `'b` defined here
-   |                      |
-   |                      lifetime `'a` defined here
-LL |     S { pointer: &mut *p.pointer }
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/issue-51415.nll.stderr b/src/test/ui/borrowck/issue-51415.nll.stderr
index d4340938eebc..ee7e3e71962e 100644
--- a/src/test/ui/borrowck/issue-51415.nll.stderr
+++ b/src/test/ui/borrowck/issue-51415.nll.stderr
@@ -13,6 +13,15 @@ note: move occurs because `s` has type `std::string::String`, which does not imp
 LL |     let opt = a.iter().enumerate().find(|(_, &s)| {
    |                                               ^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-51415.rs:16:47
+   |
+LL |     let opt = a.iter().enumerate().find(|(_, &s)| {
+   |                                               ^
+   |                                               |
+   |                                               cannot move out of data in a `&` reference
+   |                                               cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/issue-7573.nll.stderr b/src/test/ui/borrowck/issue-7573.nll.stderr
deleted file mode 100644
index 372df61d78c4..000000000000
--- a/src/test/ui/borrowck/issue-7573.nll.stderr
+++ /dev/null
@@ -1,14 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/issue-7573.rs:32:9
-   |
-LL |     let mut lines_to_use: Vec<&CrateId> = Vec::new();
-   |         ---------------- `lines_to_use` is declared here, outside of the closure body
-LL |         //~^ NOTE cannot infer an appropriate lifetime
-LL |     let push_id = |installed_id: &CrateId| {
-   |                    ------------ `installed_id` is a reference that is only valid in the closure body
-...
-LL |         lines_to_use.push(installed_id);
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `installed_id` escapes the closure body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr b/src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr
new file mode 100644
index 000000000000..d25fc7597754
--- /dev/null
+++ b/src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr
@@ -0,0 +1,33 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/move-in-static-initializer-issue-38520.rs:25:23
+   |
+LL | static Y: usize = get(*&X); //[ast]~ ERROR E0507
+   |                       ^^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/move-in-static-initializer-issue-38520.rs:25:23
+   |
+LL | static Y: usize = get(*&X); //[ast]~ ERROR E0507
+   |                       ^^^
+   |                       |
+   |                       cannot move out of data in a `&` reference
+   |                       cannot move
+
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/move-in-static-initializer-issue-38520.rs:27:22
+   |
+LL | const Z: usize = get(*&X); //[ast]~ ERROR E0507
+   |                      ^^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/move-in-static-initializer-issue-38520.rs:27:22
+   |
+LL | const Z: usize = get(*&X); //[ast]~ ERROR E0507
+   |                      ^^^
+   |                      |
+   |                      cannot move out of data in a `&` reference
+   |                      cannot move
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/mutability-errors.nll.stderr b/src/test/ui/borrowck/mutability-errors.nll.stderr
index 14c41bb81b2c..bb45fe2da811 100644
--- a/src/test/ui/borrowck/mutability-errors.nll.stderr
+++ b/src/test/ui/borrowck/mutability-errors.nll.stderr
@@ -277,7 +277,7 @@ LL |     &mut x; //~ ERROR
 LL |     &mut x.0; //~ ERROR
    |     ^^^^^^^^ cannot borrow as mutable
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/mutability-errors.rs:70:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -285,8 +285,12 @@ LL | fn imm_capture(x: (i32,)) {
 LL |     || { //~ ERROR
 LL |         x = (1,);
    |         ^^^^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0594]: cannot assign to `x.0`, as `x` is not declared as mutable
+warning[E0594]: cannot assign to `x.0`, as `x` is not declared as mutable
   --> $DIR/mutability-errors.rs:71:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -294,8 +298,12 @@ LL | fn imm_capture(x: (i32,)) {
 ...
 LL |         x.0 = 1;
    |         ^^^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
   --> $DIR/mutability-errors.rs:72:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -303,8 +311,12 @@ LL | fn imm_capture(x: (i32,)) {
 ...
 LL |         &mut x;
    |         ^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x.0` as mutable, as `x` is not declared as mutable
+warning[E0596]: cannot borrow `x.0` as mutable, as `x` is not declared as mutable
   --> $DIR/mutability-errors.rs:73:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -312,6 +324,10 @@ LL | fn imm_capture(x: (i32,)) {
 ...
 LL |         &mut x.0;
    |         ^^^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/mutability-errors.rs:76:9
@@ -373,7 +389,7 @@ error[E0596]: cannot borrow `X.0` as mutable, as `X` is an immutable static item
 LL |     &mut X.0; //~ ERROR
    |     ^^^^^^^^ cannot borrow as mutable
 
-error: aborting due to 38 previous errors
+error: aborting due to 34 previous errors
 
 Some errors occurred: E0594, E0596.
 For more information about an error, try `rustc --explain E0594`.
diff --git a/src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr b/src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr
deleted file mode 100644
index 787fc4d87299..000000000000
--- a/src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-escape-bound-fn-2.rs:18:18
-   |
-LL |     let mut x = None;
-   |         ----- `x` is declared here, outside of the closure body
-LL |     with_int(|y| x = Some(y));
-   |               -  ^^^^^^^^^^^ `y` escapes the closure body here
-   |               |
-   |               `y` is a reference that is only valid in the closure body
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr b/src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr
deleted file mode 100644
index 91f1f00ce30f..000000000000
--- a/src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-escape-bound-fn.rs:18:18
-   |
-LL |     let mut x: Option<&isize> = None;
-   |         ----- `x` is declared here, outside of the closure body
-LL |     with_int(|y| x = Some(y));
-   |               -  ^^^^^^^^^^^ `y` escapes the closure body here
-   |               |
-   |               `y` is a reference that is only valid in the closure body
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr b/src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr
deleted file mode 100644
index 44e7018fdd76..000000000000
--- a/src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-escape-unboxed-closure.rs:16:23
-   |
-LL |     let mut x: Option<&isize> = None;
-   |         ----- `x` is declared here, outside of the closure body
-LL |     with_int(&mut |y| x = Some(y));
-   |                    -  ^^^^^^^^^^^ `y` escapes the closure body here
-   |                    |
-   |                    `y` is a reference that is only valid in the closure body
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr b/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr
index 0eb5fc8c3243..0844ac32b8b6 100644
--- a/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr
+++ b/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr
@@ -7,6 +7,25 @@ LL |     call(|| {
 LL |         y.into_iter();
    |         ^ cannot move out of captured variable in an `Fn` closure
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `y`, as it is a captured variable in a `Fn` closure
+  --> $DIR/unboxed-closures-move-upvar-from-non-once-ref-closure.rs:21:9
+   |
+LL |         y.into_iter();
+   |         ^
+   |         |
+   |         cannot move out of `y`, as it is a captured variable in a `Fn` closure
+   |         cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/unboxed-closures-move-upvar-from-non-once-ref-closure.rs:20:10
+   |
+LL |       call(|| {
+   |  __________^
+LL | |         y.into_iter();
+LL | |         //~^ ERROR cannot move out of captured outer variable in an `Fn` closure
+LL | |     });
+   | |_____^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/by-move-pattern-binding.nll.stderr b/src/test/ui/by-move-pattern-binding.nll.stderr
index 491b5b5bd74a..409879581158 100644
--- a/src/test/ui/by-move-pattern-binding.nll.stderr
+++ b/src/test/ui/by-move-pattern-binding.nll.stderr
@@ -16,6 +16,15 @@ note: move occurs because `identifier` has type `std::string::String`, which doe
 LL |         &E::Bar(identifier) => f(identifier.clone())  //~ ERROR cannot move
    |                 ^^^^^^^^^^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/by-move-pattern-binding.rs:26:17
+   |
+LL |         &E::Bar(identifier) => f(identifier.clone())  //~ ERROR cannot move
+   |                 ^^^^^^^^^^
+   |                 |
+   |                 cannot move out of data in a `&` reference
+   |                 cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/check-static-values-constraints.nll.stderr b/src/test/ui/check-static-values-constraints.nll.stderr
index 5522e22fb1fa..576322ff5c19 100644
--- a/src/test/ui/check-static-values-constraints.nll.stderr
+++ b/src/test/ui/check-static-values-constraints.nll.stderr
@@ -58,13 +58,22 @@ LL |     let y = { static x: Box<isize> = box 3; x };
    |                                             cannot move out of static item
    |                                             help: consider borrowing here: `&x`
 
+error[E0507]: cannot move out of immutable static item `x`
+  --> $DIR/check-static-values-constraints.rs:120:45
+   |
+LL |     let y = { static x: Box<isize> = box 3; x };
+   |                                             ^
+   |                                             |
+   |                                             cannot move out of immutable static item `x`
+   |                                             cannot move
+
 error[E0010]: allocations are not allowed in statics
   --> $DIR/check-static-values-constraints.rs:120:38
    |
 LL |     let y = { static x: Box<isize> = box 3; x };
    |                                      ^^^^^ allocation not allowed in statics
 
-error: aborting due to 10 previous errors
+error: aborting due to 11 previous errors
 
 Some errors occurred: E0010, E0015, E0493, E0507.
 For more information about an error, try `rustc --explain E0010`.
diff --git a/src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr b/src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr
deleted file mode 100644
index ae3e3a262b5a..000000000000
--- a/src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr
+++ /dev/null
@@ -1,54 +0,0 @@
-error[E0631]: type mismatch in closure arguments
-  --> $DIR/expect-fn-supply-fn.rs:40:5
-   |
-LL |     with_closure_expecting_fn_with_free_region(|x: fn(&u32), y| {});
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ---------------- found signature of `fn(for<'r> fn(&'r u32), _) -> _`
-   |     |
-   |     expected signature of `for<'a, 'r> fn(fn(&'a u32), &'r i32) -> _`
-   |
-note: required by `with_closure_expecting_fn_with_free_region`
-  --> $DIR/expect-fn-supply-fn.rs:11:1
-   |
-LL | / fn with_closure_expecting_fn_with_free_region<F>(_: F)
-LL | |     where F: for<'a> FnOnce(fn(&'a u32), &i32)
-LL | | {
-LL | | }
-   | |_^
-
-error[E0631]: type mismatch in closure arguments
-  --> $DIR/expect-fn-supply-fn.rs:47:5
-   |
-LL |     with_closure_expecting_fn_with_bound_region(|x: fn(&'x u32), y| {});
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------- found signature of `fn(fn(&'x u32), _) -> _`
-   |     |
-   |     expected signature of `for<'r> fn(for<'s> fn(&'s u32), &'r i32) -> _`
-   |
-note: required by `with_closure_expecting_fn_with_bound_region`
-  --> $DIR/expect-fn-supply-fn.rs:16:1
-   |
-LL | / fn with_closure_expecting_fn_with_bound_region<F>(_: F)
-LL | |     where F: FnOnce(fn(&u32), &i32)
-LL | | {
-LL | | }
-   | |_^
-
-error[E0631]: type mismatch in closure arguments
-  --> $DIR/expect-fn-supply-fn.rs:56:5
-   |
-LL |     with_closure_expecting_fn_with_bound_region(|_x: Foo<'_>, y| {});
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ---------------- found signature of `for<'r> fn(fn(&'r u32), _) -> _`
-   |     |
-   |     expected signature of `for<'r> fn(for<'s> fn(&'s u32), &'r i32) -> _`
-   |
-note: required by `with_closure_expecting_fn_with_bound_region`
-  --> $DIR/expect-fn-supply-fn.rs:16:1
-   |
-LL | / fn with_closure_expecting_fn_with_bound_region<F>(_: F)
-LL | |     where F: FnOnce(fn(&u32), &i32)
-LL | | {
-LL | | }
-   | |_^
-
-error: aborting due to 3 previous errors
-
-For more information about this error, try `rustc --explain E0631`.
diff --git a/src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr b/src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr
deleted file mode 100644
index 4bc5034f93e4..000000000000
--- a/src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr
+++ /dev/null
@@ -1,29 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:15:5
-   |
-LL |   fn foo(x: &()) {
-   |             --- help: add explicit lifetime `'static` to the type of `x`: `&'static ()`
-LL | /     bar(|| {
-LL | |         //~^ ERROR explicit lifetime required in the type of `x` [E0621]
-LL | |         let _ = x;
-LL | |     })
-   | |______^ lifetime `'static` required
-
-error[E0597]: `x` does not live long enough
-  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:17:17
-   |
-LL |     bar(|| {
-   |         -- value captured here
-LL |         //~^ ERROR explicit lifetime required in the type of `x` [E0621]
-LL |         let _ = x;
-   |                 ^ borrowed value does not live long enough
-LL |     })
-LL | }
-   | - `x` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 2 previous errors
-
-Some errors occurred: E0597, E0621.
-For more information about an error, try `rustc --explain E0597`.
diff --git a/src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr b/src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr
deleted file mode 100644
index 7f842c40ece5..000000000000
--- a/src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr
+++ /dev/null
@@ -1,34 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/expect-region-supply-region.rs:28:9
-   |
-LL |     let mut f: Option<&u32> = None;
-   |         ----- `f` is declared here, outside of the closure body
-LL |     closure_expecting_bound(|x| {
-   |                              - `x` is a reference that is only valid in the closure body
-LL |         f = Some(x); //~ ERROR borrowed data cannot be stored outside of its closure
-   |         ^^^^^^^^^^^ `x` escapes the closure body here
-
-error: borrowed data escapes outside of closure
-  --> $DIR/expect-region-supply-region.rs:38:9
-   |
-LL |     let mut f: Option<&u32> = None;
-   |         ----- `f` is declared here, outside of the closure body
-LL |     closure_expecting_bound(|x: &u32| {
-   |                              - `x` is a reference that is only valid in the closure body
-LL |         f = Some(x); //~ ERROR borrowed data cannot be stored outside of its closure
-   |         ^^^^^^^^^^^ `x` escapes the closure body here
-
-error: borrowed data escapes outside of closure
-  --> $DIR/expect-region-supply-region.rs:52:9
-   |
-LL |     let mut f: Option<&u32> = None;
-   |         ----- `f` is declared here, outside of the closure body
-...
-LL |     closure_expecting_bound(|x: &'x u32| {
-   |                              - `x` is a reference that is only valid in the closure body
-...
-LL |         f = Some(x);
-   |         ^^^^^^^^^^^ `x` escapes the closure body here
-
-error: aborting due to 3 previous errors
-
diff --git a/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr b/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
index a03c5168367d..38937904f47d 100644
--- a/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
+++ b/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
@@ -190,7 +190,7 @@ error: trait bounds other than `Sized` on const fn parameters are unstable
 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0716]: temporary value dropped while borrowed
+warning[E0716]: temporary value dropped while borrowed
   --> $DIR/min_const_fn.rs:142:64
    |
 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
@@ -199,6 +199,9 @@ LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
    |                                                                creates a temporary which is freed while still in use
    |
    = note: borrowed value must be valid for the static lifetime...
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error: trait bounds other than `Sized` on const fn parameters are unstable
   --> $DIR/min_const_fn.rs:147:41
@@ -218,7 +221,7 @@ error: function pointers in const fn are unstable
 LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo }
    |                           ^^^^
 
-error: aborting due to 36 previous errors
+error: aborting due to 35 previous errors
 
 Some errors occurred: E0493, E0716.
 For more information about an error, try `rustc --explain E0493`.
diff --git a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
index 5d071a0fe240..a1d40cbfd46a 100644
--- a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
+++ b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
@@ -10,7 +10,7 @@ error: trait bounds other than `Sized` on const fn parameters are unstable
 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
    |                                                                  ^^
 
-error[E0716]: temporary value dropped while borrowed
+warning[E0716]: temporary value dropped while borrowed
   --> $DIR/min_const_fn_dyn.rs:22:67
    |
 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
@@ -19,7 +19,10 @@ LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
    |                                                                   creates a temporary which is freed while still in use
    |
    = note: borrowed value must be valid for the static lifetime...
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0716`.
diff --git a/src/test/ui/dst/dst-index.nll.stderr b/src/test/ui/dst/dst-index.nll.stderr
index 0aa85d3ed7a3..d14760b707db 100644
--- a/src/test/ui/dst/dst-index.nll.stderr
+++ b/src/test/ui/dst/dst-index.nll.stderr
@@ -16,13 +16,31 @@ error[E0507]: cannot move out of borrowed content
 LL |     S[0];
    |     ^^^^ cannot move out of borrowed content
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/dst-index.rs:41:5
+   |
+LL |     S[0];
+   |     ^^^^
+   |     |
+   |     cannot move out of data in a `&` reference
+   |     cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/dst-index.rs:44:5
    |
 LL |     T[0];
    |     ^^^^ cannot move out of borrowed content
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/dst-index.rs:44:5
+   |
+LL |     T[0];
+   |     ^^^^
+   |     |
+   |     cannot move out of data in a `&` reference
+   |     cannot move
+
+error: aborting due to 6 previous errors
 
 Some errors occurred: E0161, E0507.
 For more information about an error, try `rustc --explain E0161`.
diff --git a/src/test/ui/dst/dst-rvalue.nll.stderr b/src/test/ui/dst/dst-rvalue.nll.stderr
index b120da773a24..537ece48e012 100644
--- a/src/test/ui/dst/dst-rvalue.nll.stderr
+++ b/src/test/ui/dst/dst-rvalue.nll.stderr
@@ -16,13 +16,33 @@ error[E0507]: cannot move out of borrowed content
 LL |     let _x: Box<str> = box *"hello world";
    |                            ^^^^^^^^^^^^^^ cannot move out of borrowed content
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/dst-rvalue.rs:16:28
+   |
+LL |     let _x: Box<str> = box *"hello world";
+   |                            ^^^^^^^^^^^^^^
+   |                            |
+   |                            cannot move out of data in a `&` reference
+   |                            cannot move
+
 error[E0508]: cannot move out of type `[isize]`, a non-copy slice
   --> $DIR/dst-rvalue.rs:21:32
    |
 LL |     let _x: Box<[isize]> = box *array;
    |                                ^^^^^^ cannot move out of here
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of `*array` which is behind a `&` reference
+  --> $DIR/dst-rvalue.rs:21:32
+   |
+LL |     let array: &[isize] = &[1, 2, 3];
+   |                           ---------- help: consider changing this to be a mutable reference: `&mut [1, 2, 3]`
+LL |     let _x: Box<[isize]> = box *array;
+   |                                ^^^^^^
+   |                                |
+   |                                cannot move out of `*array` which is behind a `&` reference
+   |                                `array` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 6 previous errors
 
 Some errors occurred: E0161, E0507, E0508.
 For more information about an error, try `rustc --explain E0161`.
diff --git a/src/test/ui/error-codes/E0507.nll.stderr b/src/test/ui/error-codes/E0507.nll.stderr
new file mode 100644
index 000000000000..43795e5224dd
--- /dev/null
+++ b/src/test/ui/error-codes/E0507.nll.stderr
@@ -0,0 +1,18 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/E0507.rs:22:5
+   |
+LL |     x.borrow().nothing_is_true(); //~ ERROR E0507
+   |     ^^^^^^^^^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/E0507.rs:22:5
+   |
+LL |     x.borrow().nothing_is_true(); //~ ERROR E0507
+   |     ^^^^^^^^^^
+   |     |
+   |     cannot move out of data in a `&` reference
+   |     cannot move
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr b/src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr
deleted file mode 100644
index 65008380f9e1..000000000000
--- a/src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/E0621-does-not-trigger-for-closures.rs:25:45
-   |
-LL |     invoke(&x, |a, b| if a > b { a } else { b }); //~ ERROR E0495
-   |                    --                       ^ returning this value requires that `'1` must outlive `'2`
-   |                    ||
-   |                    |return type of closure is &'2 i32
-   |                    has type `&'1 i32`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr b/src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr
deleted file mode 100644
index 471eda45dafd..000000000000
--- a/src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/generic_type_does_not_live_long_enough.rs:16:18
-   |
-LL |     let z: i32 = x; //~ ERROR mismatched types
-   |                  ^ expected i32, found opaque type
-   |
-   = note: expected type `i32`
-              found type `WrongGeneric::<&{integer}>`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr b/src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr
deleted file mode 100644
index cadb552697e6..000000000000
--- a/src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr
+++ /dev/null
@@ -1,30 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/hr-subtype.rs:43:13
-   |
-LL |           fn subtype<'x,'y:'x,'z:'y>() {
-   |                      -- -- lifetime `'y` defined here
-   |                      |
-   |                      lifetime `'x` defined here
-LL |               gimme::<$t2>(None::<$t1>);
-   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'x` must outlive `'y`
-...
-LL | / check! { free_inv_x_vs_free_inv_y: (fn(Inv<'x>),
-LL | |                                     fn(Inv<'y>)) }
-   | |__________________________________________________- in this macro invocation
-
-error: unsatisfied lifetime constraints
-  --> $DIR/hr-subtype.rs:49:13
-   |
-LL |           fn supertype<'x,'y:'x,'z:'y>() {
-   |                        -- -- lifetime `'y` defined here
-   |                        |
-   |                        lifetime `'x` defined here
-LL |               gimme::<$t1>(None::<$t2>);
-   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'x` must outlive `'y`
-...
-LL | / check! { free_inv_x_vs_free_inv_y: (fn(Inv<'x>),
-LL | |                                     fn(Inv<'y>)) }
-   | |__________________________________________________- in this macro invocation
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr b/src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr
deleted file mode 100644
index c1bcd146b348..000000000000
--- a/src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr
+++ /dev/null
@@ -1,16 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/hr-subtype.rs:49:13
-   |
-LL |           fn supertype<'x,'y:'x,'z:'y>() {
-   |                        -- -- lifetime `'y` defined here
-   |                        |
-   |                        lifetime `'x` defined here
-LL |               gimme::<$t1>(None::<$t2>);
-   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'x` must outlive `'y`
-...
-LL | / check! { free_x_vs_free_y: (fn(&'x u32),
-LL | |                             fn(&'y u32)) }
-   | |__________________________________________- in this macro invocation
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr b/src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr
deleted file mode 100644
index 45ee808950e2..000000000000
--- a/src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/dyn-trait.rs:32:5
-   |
-LL | fn with_dyn_debug_static<'a>(x: Box<dyn Debug + 'a>) {
-   |                              - `x` is a reference that is only valid in the function body
-LL |     static_val(x); //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^ `x` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr b/src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr
deleted file mode 100644
index 485d35662445..000000000000
--- a/src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr
+++ /dev/null
@@ -1,49 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/must_outlive_least_region_or_bound.rs:13:35
-   |
-LL | fn elided(x: &i32) -> impl Copy { x }
-   |              ----                 ^ lifetime `'static` required
-   |              |
-   |              help: add explicit lifetime `'static` to the type of `x`: `&'static i32`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/must_outlive_least_region_or_bound.rs:16:44
-   |
-LL | fn explicit<'a>(x: &'a i32) -> impl Copy { x }
-   |             -- lifetime `'a` defined here  ^ returning this value requires that `'a` must outlive `'static`
-help: to allow this impl Trait to capture borrowed data with lifetime `'a`, add `'a` as a constraint
-   |
-LL | fn explicit<'a>(x: &'a i32) -> impl Copy + 'a { x }
-   |                                ^^^^^^^^^^^^^^
-
-error: unsatisfied lifetime constraints
-  --> $DIR/must_outlive_least_region_or_bound.rs:22:69
-   |
-LL | fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'static { x }
-   |               -- lifetime `'a` defined here                         ^ returning this value requires that `'a` must outlive `'static`
-   |
-   = help: consider replacing `'a` with `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/must_outlive_least_region_or_bound.rs:29:5
-   |
-LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) {
-   |                          --  -- lifetime `'b` defined here
-   |                          |
-   |                          lifetime `'a` defined here
-LL |     //~^ ERROR lifetime mismatch
-LL |     move |_| println!("{}", y)
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/must_outlive_least_region_or_bound.rs:32:51
-   |
-LL | fn ty_param_wont_outlive_static<T:Debug>(x: T) -> impl Debug + 'static {
-   |                                                   ^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error: aborting due to 5 previous errors
-
-Some errors occurred: E0310, E0621.
-For more information about an error, try `rustc --explain E0310`.
diff --git a/src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr b/src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr
deleted file mode 100644
index 7e9aa90c6c50..000000000000
--- a/src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr
+++ /dev/null
@@ -1,26 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/static-return-lifetime-infered.rs:17:9
-   |
-LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> {
-   |                         - let's call the lifetime of this reference `'1`
-LL |         self.x.iter().map(|a| a.0)
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static`
-help: to allow this impl Trait to capture borrowed data with lifetime `'1`, add `'_` as a constraint
-   |
-LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> + '_ {
-   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: unsatisfied lifetime constraints
-  --> $DIR/static-return-lifetime-infered.rs:21:9
-   |
-LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> {
-   |                    -- lifetime `'a` defined here
-LL |         self.x.iter().map(|a| a.0)
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-help: to allow this impl Trait to capture borrowed data with lifetime `'a`, add `'a` as a constraint
-   |
-LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> + 'a {
-   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/impl-trait/type_parameters_captured.nll.stderr b/src/test/ui/impl-trait/type_parameters_captured.nll.stderr
deleted file mode 100644
index 18258ef1f9dc..000000000000
--- a/src/test/ui/impl-trait/type_parameters_captured.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/type_parameters_captured.rs:17:20
-   |
-LL | fn foo<T>(x: T) -> impl Any + 'static {
-   |                    ^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0310`.
diff --git a/src/test/ui/in-band-lifetimes/mismatched.nll.stderr b/src/test/ui/in-band-lifetimes/mismatched.nll.stderr
deleted file mode 100644
index c8b2f849b32a..000000000000
--- a/src/test/ui/in-band-lifetimes/mismatched.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/mismatched.rs:14:42
-   |
-LL | fn foo(x: &'a u32, y: &u32) -> &'a u32 { y } //~ ERROR explicit lifetime required
-   |                       ----               ^ lifetime `'a` required
-   |                       |
-   |                       help: add explicit lifetime `'a` to the type of `y`: `&'a u32`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/mismatched.rs:16:46
-   |
-LL | fn foo2(x: &'a u32, y: &'b u32) -> &'a u32 { y } //~ ERROR lifetime mismatch
-   |             --          --                   ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-   |             |           |
-   |             |           lifetime `'b` defined here
-   |             lifetime `'a` defined here
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-10291.nll.stderr b/src/test/ui/issues/issue-10291.nll.stderr
deleted file mode 100644
index a21336654f37..000000000000
--- a/src/test/ui/issues/issue-10291.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-10291.rs:13:9
-   |
-LL | fn test<'x>(x: &'x isize) {
-   |         -- lifetime `'x` defined here
-LL |     drop::<Box<for<'z> FnMut(&'z isize) -> &'z isize>>(Box::new(|z| {
-LL |         x //~ ERROR E0312
-   |         ^ returning this value requires that `'x` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-12567.nll.stderr b/src/test/ui/issues/issue-12567.nll.stderr
index 72d21d47d86f..bb844c4a69f2 100644
--- a/src/test/ui/issues/issue-12567.nll.stderr
+++ b/src/test/ui/issues/issue-12567.nll.stderr
@@ -40,6 +40,43 @@ LL |         (&[], &[hd, ..]) | (&[hd, ..], &[])
 LL |         (&[hd1, ..], &[hd2, ..])
    |            ^^^
 
-error: aborting due to 2 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:16:17
+   |
+LL |         (&[], &[hd, ..]) | (&[hd, ..], &[])
+   |                 ^^
+   |                 |
+   |                 cannot move out of data in a `&` reference
+   |                 cannot move
 
-For more information about this error, try `rustc --explain E0508`.
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:16:31
+   |
+LL |         (&[], &[hd, ..]) | (&[hd, ..], &[])
+   |                               ^^
+   |                               |
+   |                               cannot move out of data in a `&` reference
+   |                               cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:20:12
+   |
+LL |         (&[hd1, ..], &[hd2, ..])
+   |            ^^^
+   |            |
+   |            cannot move out of data in a `&` reference
+   |            cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:20:24
+   |
+LL |         (&[hd1, ..], &[hd2, ..])
+   |                        ^^^
+   |                        |
+   |                        cannot move out of data in a `&` reference
+   |                        cannot move
+
+error: aborting due to 6 previous errors
+
+Some errors occurred: E0507, E0508.
+For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-13058.nll.stderr b/src/test/ui/issues/issue-13058.nll.stderr
deleted file mode 100644
index 0d641ec8e891..000000000000
--- a/src/test/ui/issues/issue-13058.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `cont`
-  --> $DIR/issue-13058.rs:24:21
-   |
-LL | fn check<'r, I: Iterator<Item=usize>, T: Itble<'r, usize, I>>(cont: &T) -> bool
-   |                                                                     -- help: add explicit lifetime `'r` to the type of `cont`: `&'r T`
-LL | {
-LL |     let cont_iter = cont.iter();
-   |                     ^^^^^^^^^^^ lifetime `'r` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-15034.nll.stderr b/src/test/ui/issues/issue-15034.nll.stderr
deleted file mode 100644
index aa5ceabfb117..000000000000
--- a/src/test/ui/issues/issue-15034.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `lexer`
-  --> $DIR/issue-15034.rs:27:9
-   |
-LL |     pub fn new(lexer: &'a mut Lexer) -> Parser<'a> {
-   |                       ------------- help: add explicit lifetime `'a` to the type of `lexer`: `&'a mut Lexer<'a>`
-LL |         Parser { lexer: lexer }
-   |         ^^^^^^^^^^^^^^^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-16683.nll.stderr b/src/test/ui/issues/issue-16683.nll.stderr
deleted file mode 100644
index 29d9948f61a4..000000000000
--- a/src/test/ui/issues/issue-16683.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/issue-16683.rs:14:9
-   |
-LL |     fn b(&self) {
-   |          ----- `self` is a reference that is only valid in the function body
-LL |         self.a(); //~ ERROR cannot infer
-   |         ^^^^^^^^ `self` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-17718-static-move.nll.stderr b/src/test/ui/issues/issue-17718-static-move.nll.stderr
index f8da3c3d5989..66fba7749f47 100644
--- a/src/test/ui/issues/issue-17718-static-move.nll.stderr
+++ b/src/test/ui/issues/issue-17718-static-move.nll.stderr
@@ -7,6 +7,15 @@ LL |     let _a = FOO; //~ ERROR: cannot move out of static item
    |              cannot move out of static item
    |              help: consider borrowing here: `&FOO`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of immutable static item `FOO`
+  --> $DIR/issue-17718-static-move.rs:16:14
+   |
+LL |     let _a = FOO; //~ ERROR: cannot move out of static item
+   |              ^^^
+   |              |
+   |              cannot move out of immutable static item `FOO`
+   |              cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-17728.nll.stderr b/src/test/ui/issues/issue-17728.nll.stderr
deleted file mode 100644
index 2cb6f831d856..000000000000
--- a/src/test/ui/issues/issue-17728.nll.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0308]: match arms have incompatible types
-  --> $DIR/issue-17728.rs:110:5
-   |
-LL | /     match to_parse { //~ ERROR match arms have incompatible types
-LL | |         "w" | "west" => RoomDirection::West,
-LL | |         "e" | "east" => RoomDirection::East,
-LL | |         "n" | "north" => RoomDirection::North,
-...  |
-LL | |         _ => None
-   | |              ---- match arm with an incompatible type
-LL | |     }
-   | |_____^ expected enum `RoomDirection`, found enum `std::option::Option`
-   |
-   = note: expected type `RoomDirection`
-              found type `std::option::Option<_>`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/issues/issue-17758.nll.stderr b/src/test/ui/issues/issue-17758.nll.stderr
deleted file mode 100644
index 87e01ace64a1..000000000000
--- a/src/test/ui/issues/issue-17758.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/issue-17758.rs:17:9
-   |
-LL |     fn bar(&self) {
-   |            ----- `self` is a reference that is only valid in the function body
-LL |         self.foo();
-   |         ^^^^^^^^^^ `self` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-20801.nll.stderr b/src/test/ui/issues/issue-20801.nll.stderr
index 362778b26c86..60e3056b8c4d 100644
--- a/src/test/ui/issues/issue-20801.nll.stderr
+++ b/src/test/ui/issues/issue-20801.nll.stderr
@@ -16,6 +16,15 @@ LL |     let b = unsafe { *imm_ref() };
    |                      cannot move out of borrowed content
    |                      help: consider removing the `*`: `imm_ref()`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-20801.rs:39:22
+   |
+LL |     let b = unsafe { *imm_ref() };
+   |                      ^^^^^^^^^^
+   |                      |
+   |                      cannot move out of data in a `&` reference
+   |                      cannot move
+
 error[E0507]: cannot move out of dereference of raw pointer
   --> $DIR/issue-20801.rs:42:22
    |
@@ -34,6 +43,15 @@ LL |     let d = unsafe { *const_ptr() };
    |                      cannot move out of dereference of raw pointer
    |                      help: consider removing the `*`: `const_ptr()`
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of data in a `*const` pointer
+  --> $DIR/issue-20801.rs:45:22
+   |
+LL |     let d = unsafe { *const_ptr() };
+   |                      ^^^^^^^^^^^^
+   |                      |
+   |                      cannot move out of data in a `*const` pointer
+   |                      cannot move
+
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-2590.nll.stderr b/src/test/ui/issues/issue-2590.nll.stderr
index fa2df26498a0..ae726d26d072 100644
--- a/src/test/ui/issues/issue-2590.nll.stderr
+++ b/src/test/ui/issues/issue-2590.nll.stderr
@@ -4,6 +4,17 @@ error[E0507]: cannot move out of borrowed content
 LL |         self.tokens //~ ERROR cannot move out of borrowed content
    |         ^^^^^^^^^^^ cannot move out of borrowed content
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `self.tokens` which is behind a `&` reference
+  --> $DIR/issue-2590.rs:22:9
+   |
+LL |     fn parse(&self) -> Vec<isize> {
+   |              ----- help: consider changing this to be a mutable reference: `&mut self`
+LL |         self.tokens //~ ERROR cannot move out of borrowed content
+   |         ^^^^^^^^^^^
+   |         |
+   |         cannot move out of `self.tokens` which is behind a `&` reference
+   |         `self` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-26217.nll.stderr b/src/test/ui/issues/issue-26217.nll.stderr
deleted file mode 100644
index f28b06540990..000000000000
--- a/src/test/ui/issues/issue-26217.nll.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error[E0131]: `main` function is not allowed to have generic parameters
-  --> $DIR/issue-26217.rs:13:8
-   |
-LL | fn main<'a>() {
-   |        ^^^^ `main` cannot have generic parameters
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0131`.
diff --git a/src/test/ui/issues/issue-30355.nll.stderr b/src/test/ui/issues/issue-30355.nll.stderr
index fdf8157dcf83..78cf3661bb76 100644
--- a/src/test/ui/issues/issue-30355.nll.stderr
+++ b/src/test/ui/issues/issue-30355.nll.stderr
@@ -16,7 +16,16 @@ error[E0508]: cannot move out of type `[u8]`, a non-copy slice
 LL |     &X(*Y)
    |        ^^ cannot move out of here
 
-error: aborting due to 3 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-30355.rs:15:8
+   |
+LL |     &X(*Y)
+   |        ^^
+   |        |
+   |        cannot move out of data in a `&` reference
+   |        cannot move
 
-Some errors occurred: E0161, E0508.
+error: aborting due to 4 previous errors
+
+Some errors occurred: E0161, E0507, E0508.
 For more information about an error, try `rustc --explain E0161`.
diff --git a/src/test/ui/issues/issue-40288-2.nll.stderr b/src/test/ui/issues/issue-40288-2.nll.stderr
deleted file mode 100644
index e15e4e86dbcb..000000000000
--- a/src/test/ui/issues/issue-40288-2.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/issue-40288-2.rs:17:9
-   |
-LL | fn lifetime_transmute_slice<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
-   |                                                         -- help: add explicit lifetime `'a` to the type of `y`: `&'a T`
-...
-LL |         slice[0] = y;
-   |         ^^^^^^^^^^^^ lifetime `'a` required
-
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/issue-40288-2.rs:32:9
-   |
-LL | fn lifetime_transmute_struct<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
-   |                                                          -- help: add explicit lifetime `'a` to the type of `y`: `&'a T`
-...
-LL |         dst.head = y;
-   |         ^^^^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr
index 9020d3778c37..22fcffb9527a 100644
--- a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr
+++ b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr
@@ -7,6 +7,15 @@ LL |     let e = f.v[0]; //~ ERROR cannot move out of indexed content
    |             cannot move out of borrowed content
    |             help: consider borrowing here: `&f.v[0]`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-40402-1.rs:19:13
+   |
+LL |     let e = f.v[0]; //~ ERROR cannot move out of indexed content
+   |             ^^^^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr
index a80e9a5fe091..cdb547ad1006 100644
--- a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr
+++ b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr
@@ -1,3 +1,21 @@
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-40402-2.rs:15:10
+   |
+LL |     let (a, b) = x[0]; //~ ERROR cannot move out of indexed content
+   |          ^
+   |          |
+   |          cannot move out of data in a `&` reference
+   |          cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-40402-2.rs:15:13
+   |
+LL |     let (a, b) = x[0]; //~ ERROR cannot move out of indexed content
+   |             ^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/issue-40402-2.rs:15:18
    |
@@ -15,6 +33,6 @@ note: move occurs because these variables have types that don't implement the `C
 LL |     let (a, b) = x[0]; //~ ERROR cannot move out of indexed content
    |          ^  ^
 
-error: aborting due to previous error
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-40510-1.nll.stderr b/src/test/ui/issues/issue-40510-1.nll.stderr
index 1aeb1a89ead9..ee8fdc16a06f 100644
--- a/src/test/ui/issues/issue-40510-1.nll.stderr
+++ b/src/test/ui/issues/issue-40510-1.nll.stderr
@@ -1,4 +1,4 @@
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/issue-40510-1.rs:18:9
    |
 LL |     || {
@@ -8,6 +8,15 @@ LL |         &mut x
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/issue-40510-1.rs:23:1
+   |
+LL | fn main() {} //~ ERROR compilation successful
+   | ^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-40510-3.nll.stderr b/src/test/ui/issues/issue-40510-3.nll.stderr
index c334e592fbc2..37a00746a88c 100644
--- a/src/test/ui/issues/issue-40510-3.nll.stderr
+++ b/src/test/ui/issues/issue-40510-3.nll.stderr
@@ -1,4 +1,4 @@
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/issue-40510-3.rs:18:9
    |
 LL |       || {
@@ -10,6 +10,15 @@ LL | |         }
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/issue-40510-3.rs:25:1
+   |
+LL | fn main() {} //~ ERROR compilation successful
+   | ^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-4335.nll.stderr b/src/test/ui/issues/issue-4335.nll.stderr
index a9345e86f724..fb123de21392 100644
--- a/src/test/ui/issues/issue-4335.nll.stderr
+++ b/src/test/ui/issues/issue-4335.nll.stderr
@@ -6,6 +6,15 @@ LL | fn f<'r, T>(v: &'r T) -> Box<FnMut() -> T + 'r> {
 LL |     id(Box::new(|| *v))
    |                    ^^ cannot move out of captured variable in an `FnMut` closure
 
+error[E0507]: cannot move out of `*v` which is behind a `&` reference
+  --> $DIR/issue-4335.rs:16:20
+   |
+LL |     id(Box::new(|| *v))
+   |                    ^^
+   |                    |
+   |                    cannot move out of `*v` which is behind a `&` reference
+   |                    cannot move
+
 error[E0597]: `v` does not live long enough
   --> $DIR/issue-4335.rs:16:21
    |
@@ -23,7 +32,7 @@ note: borrowed value must be valid for the lifetime 'r as defined on the functio
 LL | fn f<'r, T>(v: &'r T) -> Box<FnMut() -> T + 'r> {
    |      ^^
 
-error: aborting due to 2 previous errors
+error: aborting due to 3 previous errors
 
 Some errors occurred: E0507, E0597.
 For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-49824.nll.stderr b/src/test/ui/issues/issue-49824.nll.stderr
index 2e0463fdd1d8..555558c99d93 100644
--- a/src/test/ui/issues/issue-49824.nll.stderr
+++ b/src/test/ui/issues/issue-49824.nll.stderr
@@ -1,4 +1,4 @@
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/issue-49824.rs:22:9
    |
 LL |       || {
@@ -10,6 +10,21 @@ LL | |         }
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/issue-49824.rs:18:1
+   |
+LL | / fn main() {
+LL | |     //~^ compilation successful
+LL | |     let mut x = 0;
+LL | |     || {
+...  |
+LL | |     };
+LL | | }
+   | |_^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-52213.nll.stderr b/src/test/ui/issues/issue-52213.nll.stderr
deleted file mode 100644
index dab3fd866ba6..000000000000
--- a/src/test/ui/issues/issue-52213.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-52213.rs:13:20
-   |
-LL | fn transmute_lifetime<'a, 'b, T>(t: &'a (T,)) -> &'b T {
-   |                       --  -- lifetime `'b` defined here
-   |                       |
-   |                       lifetime `'a` defined here
-LL |     match (&t,) { //~ ERROR cannot infer an appropriate lifetime
-LL |         ((u,),) => u,
-   |                    ^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-52533-1.nll.stderr b/src/test/ui/issues/issue-52533-1.nll.stderr
deleted file mode 100644
index cc5f4df79f8f..000000000000
--- a/src/test/ui/issues/issue-52533-1.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-52533-1.rs:19:18
-   |
-LL |     gimme(|x, y| y)
-   |            -  -  ^ closure was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-   |            |  |
-   |            |  has type `&Foo<'_, '1, u32>`
-   |            has type `&Foo<'_, '2, u32>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-52533.nll.stderr b/src/test/ui/issues/issue-52533.nll.stderr
deleted file mode 100644
index 37ab2a3b84d2..000000000000
--- a/src/test/ui/issues/issue-52533.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-52533.rs:15:16
-   |
-LL |     foo(|a, b| b)
-   |          -  -  ^ closure was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-   |          |  |
-   |          |  has type `&'1 u32`
-   |          has type `&'2 u32`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/kindck/kindck-impl-type-params.nll.stderr b/src/test/ui/kindck/kindck-impl-type-params.nll.stderr
deleted file mode 100644
index d484632f4c34..000000000000
--- a/src/test/ui/kindck/kindck-impl-type-params.nll.stderr
+++ /dev/null
@@ -1,63 +0,0 @@
-error[E0277]: `T` cannot be sent between threads safely
-  --> $DIR/kindck-impl-type-params.rs:28:13
-   |
-LL |     let a = &t as &Gettable<T>;
-   |             ^^ `T` cannot be sent between threads safely
-   |
-   = help: the trait `std::marker::Send` is not implemented for `T`
-   = help: consider adding a `where T: std::marker::Send` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:28:13
-   |
-LL |     let a = &t as &Gettable<T>;
-   |             ^^ the trait `std::marker::Copy` is not implemented for `T`
-   |
-   = help: consider adding a `where T: std::marker::Copy` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: `T` cannot be sent between threads safely
-  --> $DIR/kindck-impl-type-params.rs:35:27
-   |
-LL |     let a: &Gettable<T> = &t;
-   |                           ^^ `T` cannot be sent between threads safely
-   |
-   = help: the trait `std::marker::Send` is not implemented for `T`
-   = help: consider adding a `where T: std::marker::Send` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:35:27
-   |
-LL |     let a: &Gettable<T> = &t;
-   |                           ^^ the trait `std::marker::Copy` is not implemented for `T`
-   |
-   = help: consider adding a `where T: std::marker::Copy` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: the trait bound `std::string::String: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:48:13
-   |
-LL |     let a = t as Box<Gettable<String>>;
-   |             ^ the trait `std::marker::Copy` is not implemented for `std::string::String`
-   |
-   = note: required because of the requirements on the impl of `Gettable<std::string::String>` for `S<std::string::String>`
-   = note: required for the cast to the object type `dyn Gettable<std::string::String>`
-
-error[E0277]: the trait bound `foo3::Foo: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:56:33
-   |
-LL |     let a: Box<Gettable<Foo>> = t;
-   |                                 ^ the trait `std::marker::Copy` is not implemented for `foo3::Foo`
-   |
-   = note: required because of the requirements on the impl of `Gettable<foo3::Foo>` for `S<foo3::Foo>`
-   = note: required for the cast to the object type `dyn Gettable<foo3::Foo>`
-
-error: aborting due to 6 previous errors
-
-For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/kindck/kindck-send-object1.nll.stderr b/src/test/ui/kindck/kindck-send-object1.nll.stderr
deleted file mode 100644
index a45ba157bf9a..000000000000
--- a/src/test/ui/kindck/kindck-send-object1.nll.stderr
+++ /dev/null
@@ -1,32 +0,0 @@
-error[E0277]: `(dyn Dummy + 'a)` cannot be shared between threads safely
-  --> $DIR/kindck-send-object1.rs:20:5
-   |
-LL |     assert_send::<&'a Dummy>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Dummy + 'a)` cannot be shared between threads safely
-   |
-   = help: the trait `std::marker::Sync` is not implemented for `(dyn Dummy + 'a)`
-   = note: required because of the requirements on the impl of `std::marker::Send` for `&'a (dyn Dummy + 'a)`
-note: required by `assert_send`
-  --> $DIR/kindck-send-object1.rs:15:1
-   |
-LL | fn assert_send<T:Send+'static>() { }
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error[E0277]: `(dyn Dummy + 'a)` cannot be sent between threads safely
-  --> $DIR/kindck-send-object1.rs:39:5
-   |
-LL |     assert_send::<Box<Dummy+'a>>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Dummy + 'a)` cannot be sent between threads safely
-   |
-   = help: the trait `std::marker::Send` is not implemented for `(dyn Dummy + 'a)`
-   = note: required because of the requirements on the impl of `std::marker::Send` for `std::ptr::Unique<(dyn Dummy + 'a)>`
-   = note: required because it appears within the type `std::boxed::Box<(dyn Dummy + 'a)>`
-note: required by `assert_send`
-  --> $DIR/kindck-send-object1.rs:15:1
-   |
-LL | fn assert_send<T:Send+'static>() { }
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr b/src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr
deleted file mode 100644
index bc15df264cc3..000000000000
--- a/src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/lifetime-bound-will-change-warning.rs:44:5
-   |
-LL | fn test2<'a>(x: &'a Box<Fn()+'a>) {
-   |              - `x` is a reference that is only valid in the function body
-LL |     // but ref_obj will not, so warn.
-LL |     ref_obj(x) //~ ERROR mismatched types
-   |     ^^^^^^^^^^ `x` escapes the function body here
-
-error: borrowed data escapes outside of function
-  --> $DIR/lifetime-bound-will-change-warning.rs:49:5
-   |
-LL | fn test2cc<'a>(x: &'a Box<Fn()+'a>) {
-   |                - `x` is a reference that is only valid in the function body
-LL |     // same as test2, but cross crate
-LL |     lib::ref_obj(x) //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^ `x` escapes the function body here
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr
deleted file mode 100644
index 4e3193ccbfd5..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:21:20
-   |
-LL |     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
-   |            --     - let's call the lifetime of this reference `'1`
-   |            |
-   |            lifetime `'a` defined here
-LL | 
-LL |         if x > y { x } else { y } //~ ERROR lifetime mismatch
-   |                    ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr
deleted file mode 100644
index 3413203fa7f0..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex1-return-one-existing-name-return-type-is-anon.rs:18:5
-   |
-LL |   fn foo<'a>(&self, x: &'a i32) -> &i32 {
-   |          --  - let's call the lifetime of this reference `'1`
-   |          |
-   |          lifetime `'a` defined here
-LL | 
-LL |     x //~ ERROR lifetime mismatch
-   |     ^ function was supposed to return data with lifetime `'1` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr
deleted file mode 100644
index 239419967f6c..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex1-return-one-existing-name-self-is-anon.rs:18:30
-   |
-LL |     fn foo<'a>(&self, x: &'a Foo) -> &'a Foo {
-   |            --  - let's call the lifetime of this reference `'1`
-   |            |
-   |            lifetime `'a` defined here
-LL | 
-LL |         if true { x } else { self } //~ ERROR lifetime mismatch
-   |                              ^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr
deleted file mode 100644
index 709d9f84db3f..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/ex2a-push-one-existing-name-2.rs:16:5
-   |
-LL | fn foo<'a>(x: Ref<i32>, y: &mut Vec<Ref<'a, i32>>) {
-   |               -------- help: add explicit lifetime `'a` to the type of `x`: `Ref<'a, i32>`
-LL |     y.push(x); //~ ERROR explicit lifetime
-   |     ^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr
deleted file mode 100644
index 1e608fe16e41..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/ex2a-push-one-existing-name-early-bound.rs:17:5
-   |
-LL | fn baz<'a, 'b, T>(x: &mut Vec<&'a T>, y: &T)
-   |                                          -- help: add explicit lifetime `'a` to the type of `y`: `&'a T`
-...
-LL |     x.push(y); //~ ERROR explicit lifetime required
-   |     ^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr
deleted file mode 100644
index 141943520939..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/ex2a-push-one-existing-name.rs:16:5
-   |
-LL | fn foo<'a>(x: &mut Vec<Ref<'a, i32>>, y: Ref<i32>) {
-   |                                          -------- help: add explicit lifetime `'a` to the type of `y`: `Ref<'a, i32>`
-LL |     x.push(y); //~ ERROR explicit lifetime
-   |     ^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr
deleted file mode 100644
index fc5f02fbc721..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2b-push-no-existing-names.rs:16:5
-   |
-LL | fn foo(x: &mut Vec<Ref<i32>>, y: Ref<i32>) {
-   |        -                      - has type `Ref<'1, i32>`
-   |        |
-   |        has type `&mut std::vec::Vec<Ref<'2, i32>>`
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr
deleted file mode 100644
index a5053244dc1f..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2c-push-inference-variable.rs:17:5
-   |
-LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
-   |            --  -- lifetime `'c` defined here
-   |            |
-   |            lifetime `'b` defined here
-LL |     let z = Ref { data: y.data };
-LL |     x.push(z); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'c` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr
deleted file mode 100644
index 361fb708d401..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2d-push-inference-variable-2.rs:18:5
-   |
-LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
-   |            --  -- lifetime `'c` defined here
-   |            |
-   |            lifetime `'b` defined here
-...
-LL |     a.push(b);
-   |     ^^^^^^^^^ argument requires that `'c` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr
deleted file mode 100644
index 5d0f07054dfe..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2e-push-inference-variable-3.rs:18:5
-   |
-LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
-   |            --  -- lifetime `'c` defined here
-   |            |
-   |            lifetime `'b` defined here
-...
-LL |     Vec::push(a, b);
-   |     ^^^^^^^^^^^^^^^ argument requires that `'c` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr
deleted file mode 100644
index e4aafd7b66e4..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-2.rs:12:5
-   |
-LL | fn foo(&mut (ref mut v, w): &mut (&u8, &u8), x: &u8) {
-   |                                   -             - let's call the lifetime of this reference `'1`
-   |                                   |
-   |                                   let's call the lifetime of this reference `'2`
-LL |     *v = x; //~ ERROR lifetime mismatch
-   |     ^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr
deleted file mode 100644
index e1872dcf777e..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr
+++ /dev/null
@@ -1,22 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-3.rs:12:5
-   |
-LL | fn foo(z: &mut Vec<(&u8,&u8)>, (x, y): (&u8, &u8)) {
-   |                     -                   - let's call the lifetime of this reference `'1`
-   |                     |
-   |                     let's call the lifetime of this reference `'2`
-LL |     z.push((x,y)); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-3.rs:12:5
-   |
-LL | fn foo(z: &mut Vec<(&u8,&u8)>, (x, y): (&u8, &u8)) {
-   |                         -                    - let's call the lifetime of this reference `'1`
-   |                         |
-   |                         let's call the lifetime of this reference `'2`
-LL |     z.push((x,y)); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr
deleted file mode 100644
index 934cdcd2ef28..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-2.rs:16:5
-   |
-LL | fn foo(mut x: Ref, y: Ref) {
-   |        -----       - has type `Ref<'_, '1>`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     x.b = y.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr
deleted file mode 100644
index cbfd9d478091..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-3.rs:16:5
-   |
-LL | fn foo(mut x: Ref) {
-   |        -----
-   |        |
-   |        has type `Ref<'_, '1>`
-   |        has type `Ref<'2, '_>`
-LL |     x.a = x.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr
deleted file mode 100644
index 7f814b730fff..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-earlybound-regions.rs:18:5
-   |
-LL | fn foo<'a, 'b>(mut x: Vec<Ref<'a>>, y: Ref<'b>)
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr
deleted file mode 100644
index f38dceb331bf..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-latebound-regions.rs:15:5
-   |
-LL | fn foo<'a, 'b>(mut x: Vec<Ref<'a>>, y: Ref<'b>) {
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr
deleted file mode 100644
index 39a7154c8e95..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs.rs:15:5
-   |
-LL | fn foo(mut x: Vec<Ref>, y: Ref) {
-   |        -----            - has type `Ref<'1>`
-   |        |
-   |        has type `std::vec::Vec<Ref<'2>>`
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr
deleted file mode 100644
index d59480cefcc6..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-latebound-regions.rs:12:5
-   |
-LL | fn foo<'a,'b>(x: &mut Vec<&'a u8>, y: &'b u8) {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr
deleted file mode 100644
index fc1fab7aab5b..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct-2.rs:14:5
-   |
-LL | fn foo(mut x: Ref, y: &u32) {
-   |        -----          - let's call the lifetime of this reference `'2`
-   |        |
-   |        has type `Ref<'_, '1>`
-LL |     y = x.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error[E0384]: cannot assign to immutable argument `y`
-  --> $DIR/ex3-both-anon-regions-one-is-struct-2.rs:14:5
-   |
-LL | fn foo(mut x: Ref, y: &u32) {
-   |                    - help: make this binding mutable: `mut y`
-LL |     y = x.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ cannot assign to immutable argument
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0384`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-3.nll.stderr
deleted file mode 100644
index 8100fa89c2d0..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-3.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct-3.rs:14:5
-   |
-LL | fn foo(mut y: Ref, x: &u32) {
-   |        -----          - let's call the lifetime of this reference `'1`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     y.b = x; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-4.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-4.nll.stderr
deleted file mode 100644
index 1c4a8b665893..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-4.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct-4.rs:14:5
-   |
-LL | fn foo(mut y: Ref, x: &u32) {
-   |        -----          - let's call the lifetime of this reference `'1`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     y.b = x; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct.nll.stderr
deleted file mode 100644
index 2a4c5a685f16..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct.rs:17:5
-   |
-LL | fn foo(mut x: Ref, y: &u32) {
-   |        -----          - let's call the lifetime of this reference `'1`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     x.b = y; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.nll.stderr
deleted file mode 100644
index 898f997779d1..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:17:5
-   |
-LL |   fn foo<'a>(&self, x: &i32) -> &i32 {
-   |              -         - let's call the lifetime of this reference `'1`
-   |              |
-   |              let's call the lifetime of this reference `'2`
-LL |     x //~ ERROR lifetime mismatch
-   |     ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.nll.stderr
deleted file mode 100644
index bdb9b306cdae..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-self-is-anon.rs:17:19
-   |
-LL |     fn foo<'a>(&self, x: &Foo) -> &Foo {
-   |                -         - let's call the lifetime of this reference `'1`
-   |                |
-   |                let's call the lifetime of this reference `'2`
-LL |         if true { x } else { self } //~ ERROR lifetime mismatch
-   |                   ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-fn-items.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-fn-items.nll.stderr
deleted file mode 100644
index 2e4df170d6cd..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-fn-items.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error[E0596]: cannot borrow `y` as mutable, as it is not declared as mutable
-  --> $DIR/ex3-both-anon-regions-using-fn-items.rs:11:3
-   |
-LL | fn foo(x:fn(&u8, &u8), y: Vec<&u8>, z: &u8) {
-   |                        - help: consider changing this to be mutable: `mut y`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^ cannot borrow as mutable
-
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-using-fn-items.rs:11:3
-   |
-LL | fn foo(x:fn(&u8, &u8), y: Vec<&u8>, z: &u8) {
-   |                               -        - let's call the lifetime of this reference `'1`
-   |                               |
-   |                               let's call the lifetime of this reference `'2`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0596`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-impl-items.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-impl-items.nll.stderr
deleted file mode 100644
index 8d743608438b..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-impl-items.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-using-impl-items.rs:15:9
-   |
-LL |     fn foo(x: &mut Vec<&u8>, y: &u8) {
-   |                        -        - let's call the lifetime of this reference `'1`
-   |                        |
-   |                        let's call the lifetime of this reference `'2`
-LL |         x.push(y); //~ ERROR lifetime mismatch
-   |         ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-trait-objects.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-trait-objects.nll.stderr
deleted file mode 100644
index a2dc0e4bda3b..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-trait-objects.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error[E0596]: cannot borrow `y` as mutable, as it is not declared as mutable
-  --> $DIR/ex3-both-anon-regions-using-trait-objects.rs:11:3
-   |
-LL | fn foo(x:Box<Fn(&u8, &u8)> , y: Vec<&u8>, z: &u8) {
-   |                              - help: consider changing this to be mutable: `mut y`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^ cannot borrow as mutable
-
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-using-trait-objects.rs:11:3
-   |
-LL | fn foo(x:Box<Fn(&u8, &u8)> , y: Vec<&u8>, z: &u8) {
-   |                                     -        - let's call the lifetime of this reference `'1`
-   |                                     |
-   |                                     let's call the lifetime of this reference `'2`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0596`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions.nll.stderr
deleted file mode 100644
index 0d674162eea0..000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions.rs:12:5
-   |
-LL | fn foo(x: &mut Vec<&u8>, y: &u8) {
-   |                    -        - let's call the lifetime of this reference `'1`
-   |                    |
-   |                    let's call the lifetime of this reference `'2`
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lub-if.nll.stderr b/src/test/ui/lub-if.nll.stderr
deleted file mode 100644
index 2405e30a8cd0..000000000000
--- a/src/test/ui/lub-if.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-if.rs:38:9
-   |
-LL | pub fn opt_str2<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |         s  //~ ERROR E0312
-   |         ^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-if.rs:45:9
-   |
-LL | pub fn opt_str3<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |         s  //~ ERROR E0312
-   |         ^ returning this value requires that `'a` must outlive `'static`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/lub-match.nll.stderr b/src/test/ui/lub-match.nll.stderr
deleted file mode 100644
index 5a39dd14e4c4..000000000000
--- a/src/test/ui/lub-match.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-match.rs:40:13
-   |
-LL | pub fn opt_str2<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |             s //~ ERROR E0312
-   |             ^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-match.rs:49:13
-   |
-LL | pub fn opt_str3<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |             s //~ ERROR E0312
-   |             ^ returning this value requires that `'a` must outlive `'static`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/match/match-ref-mut-invariance.nll.stderr b/src/test/ui/match/match-ref-mut-invariance.nll.stderr
deleted file mode 100644
index d5167bbaeab0..000000000000
--- a/src/test/ui/match/match-ref-mut-invariance.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/match-ref-mut-invariance.rs:20:9
-   |
-LL | impl<'b> S<'b> {
-   |      -- lifetime `'b` defined here
-LL |     fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
-   |            -- lifetime `'a` defined here
-LL |         match self.0 { ref mut x => x } //~ ERROR mismatched types
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/match/match-ref-mut-let-invariance.nll.stderr b/src/test/ui/match/match-ref-mut-let-invariance.nll.stderr
deleted file mode 100644
index 54915865d889..000000000000
--- a/src/test/ui/match/match-ref-mut-let-invariance.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/match-ref-mut-let-invariance.rs:21:9
-   |
-LL | impl<'b> S<'b> {
-   |      -- lifetime `'b` defined here
-LL |     fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
-   |            -- lifetime `'a` defined here
-LL |         let ref mut x = self.0;
-LL |         x //~ ERROR mismatched types
-   |         ^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr b/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr
index 1f22ab148185..1ded703fd5a2 100644
--- a/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr
+++ b/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr
@@ -16,6 +16,18 @@ note: move occurs because `x` has type `std::boxed::Box<isize>`, which does not
 LL |                 box E::Bar(x) => println!("{}", x.to_string()),
    |                            ^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `hellothere.x.0` which is behind a `&` reference
+  --> $DIR/moves-based-on-type-block-bad.rs:37:28
+   |
+LL |         f(&s, |hellothere| {
+   |                ---------- help: consider changing this to be a mutable reference: `&mut S`
+...
+LL |                 box E::Bar(x) => println!("{}", x.to_string()),
+   |                            ^
+   |                            |
+   |                            cannot move out of `hellothere.x.0` which is behind a `&` reference
+   |                            `hellothere` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr b/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr
index 13a6fc15ce31..a34a9efab6bc 100644
--- a/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr
+++ b/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr
@@ -6,6 +6,21 @@ LL |     let i = box 3;
 LL |     let _f = to_fn(|| test(i)); //~ ERROR cannot move out
    |                            ^ cannot move out of captured variable in an `Fn` closure
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `i`, as it is a captured variable in a `Fn` closure
+  --> $DIR/moves-based-on-type-move-out-of-closure-env-issue-1965.rs:21:28
+   |
+LL |     let _f = to_fn(|| test(i)); //~ ERROR cannot move out
+   |                            ^
+   |                            |
+   |                            cannot move out of `i`, as it is a captured variable in a `Fn` closure
+   |                            cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/moves-based-on-type-move-out-of-closure-env-issue-1965.rs:21:20
+   |
+LL |     let _f = to_fn(|| test(i)); //~ ERROR cannot move out
+   |                    ^^^^^^^^^^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/nll/cannot-move-block-spans.nll.stderr b/src/test/ui/nll/cannot-move-block-spans.nll.stderr
index 6a4c8f2e8d81..2d54ae0b81ec 100644
--- a/src/test/ui/nll/cannot-move-block-spans.nll.stderr
+++ b/src/test/ui/nll/cannot-move-block-spans.nll.stderr
@@ -7,6 +7,17 @@ LL |     let x = { *r }; //~ ERROR
    |               cannot move out of borrowed content
    |               help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:15:15
+   |
+LL | pub fn deref(r: &String) {
+   |                 ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { *r }; //~ ERROR
+   |               ^^
+   |               |
+   |               cannot move out of `*r` which is behind a `&` reference
+   |               `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:16:22
    |
@@ -16,6 +27,18 @@ LL |     let y = unsafe { *r }; //~ ERROR
    |                      cannot move out of borrowed content
    |                      help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:16:22
+   |
+LL | pub fn deref(r: &String) {
+   |                 ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { *r }; //~ ERROR
+LL |     let y = unsafe { *r }; //~ ERROR
+   |                      ^^
+   |                      |
+   |                      cannot move out of `*r` which is behind a `&` reference
+   |                      `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:17:26
    |
@@ -25,6 +48,18 @@ LL |     let z = loop { break *r; }; //~ ERROR
    |                          cannot move out of borrowed content
    |                          help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:17:26
+   |
+LL | pub fn deref(r: &String) {
+   |                 ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+...
+LL |     let z = loop { break *r; }; //~ ERROR
+   |                          ^^
+   |                          |
+   |                          cannot move out of `*r` which is behind a `&` reference
+   |                          `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0508]: cannot move out of type `[std::string::String; 2]`, a non-copy array
   --> $DIR/cannot-move-block-spans.rs:21:15
    |
@@ -61,6 +96,17 @@ LL |     let x = { let mut u = 0; u += 1; *r }; //~ ERROR
    |                                      cannot move out of borrowed content
    |                                      help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:27:38
+   |
+LL | pub fn additional_statement_cases(r: &String) {
+   |                                      ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { let mut u = 0; u += 1; *r }; //~ ERROR
+   |                                      ^^
+   |                                      |
+   |                                      cannot move out of `*r` which is behind a `&` reference
+   |                                      `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:28:45
    |
@@ -70,6 +116,18 @@ LL |     let y = unsafe { let mut u = 0; u += 1; *r }; //~ ERROR
    |                                             cannot move out of borrowed content
    |                                             help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:28:45
+   |
+LL | pub fn additional_statement_cases(r: &String) {
+   |                                      ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { let mut u = 0; u += 1; *r }; //~ ERROR
+LL |     let y = unsafe { let mut u = 0; u += 1; *r }; //~ ERROR
+   |                                             ^^
+   |                                             |
+   |                                             cannot move out of `*r` which is behind a `&` reference
+   |                                             `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:29:49
    |
@@ -79,7 +137,19 @@ LL |     let z = loop { let mut u = 0; u += 1; break *r; u += 2; }; //~ ERROR
    |                                                 cannot move out of borrowed content
    |                                                 help: consider removing the `*`: `r`
 
-error: aborting due to 9 previous errors
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:29:49
+   |
+LL | pub fn additional_statement_cases(r: &String) {
+   |                                      ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+...
+LL |     let z = loop { let mut u = 0; u += 1; break *r; u += 2; }; //~ ERROR
+   |                                                 ^^
+   |                                                 |
+   |                                                 cannot move out of `*r` which is behind a `&` reference
+   |                                                 `r` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 15 previous errors
 
 Some errors occurred: E0507, E0508.
 For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr b/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr
index 54b1fcbd5bbf..4fe01d472f50 100644
--- a/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr
+++ b/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr
@@ -1,8 +1,36 @@
-error[E0507]: cannot move out of borrowed content
+warning[E0507]: cannot move out of borrowed content
   --> $DIR/match-guards-always-borrow.rs:23:13
    |
 LL |             (|| { let bar = foo; bar.take() })();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot move out of borrowed content
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+warning[E0507]: cannot move out of `foo`, as it is immutable for the pattern guard
+  --> $DIR/match-guards-always-borrow.rs:23:13
+   |
+LL |             (|| { let bar = foo; bar.take() })();
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |             |
+   |             cannot move out of `foo`, as it is immutable for the pattern guard
+   |             cannot move
+   |
+   = note: variables bound in patterns are immutable until the end of the pattern guard
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/match-guards-always-borrow.rs:57:1
+   |
+LL | / fn main() { //[ast]~ ERROR compilation successful
+LL | |     should_reject_destructive_mutate_in_guard();
+LL | |     allow_mutate_in_arm_body();
+LL | |     allow_move_into_arm_body();
+LL | | }
+   | |_^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr b/src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr
deleted file mode 100644
index 1e953ecff692..000000000000
--- a/src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the associated type `<T as MyTrait<'_>>::Output` may not live long enough
-  --> $DIR/projection-where-clause-env-wrong-lifetime.rs:14:5
-   |
-LL |     bar::<<T as MyTrait<'a>>::Output>()
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as MyTrait<'_>>::Output: 'a`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-elision.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-elision.nll.stderr
deleted file mode 100644
index e132ec67b963..000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-elision.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-elision.rs:81:5
-   |
-LL | fn load3<'a,'b>(ss: &'a SomeTrait) -> &'b SomeTrait {
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-...
-LL |     ss
-   |     ^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-from-box-error.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-from-box-error.nll.stderr
deleted file mode 100644
index e0c291928283..000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-from-box-error.nll.stderr
+++ /dev/null
@@ -1,28 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `ss`
-  --> $DIR/object-lifetime-default-from-box-error.rs:28:5
-   |
-LL | fn load(ss: &mut SomeStruct) -> Box<SomeTrait> {
-   |             --------------- help: add explicit lifetime `'static` to the type of `ss`: `&mut SomeStruct<'static>`
-...
-LL |     ss.r //~ ERROR explicit lifetime required in the type of `ss` [E0621]
-   |     ^^^^ lifetime `'static` required
-
-error[E0507]: cannot move out of borrowed content
-  --> $DIR/object-lifetime-default-from-box-error.rs:28:5
-   |
-LL |     ss.r //~ ERROR explicit lifetime required in the type of `ss` [E0621]
-   |     ^^^^ cannot move out of borrowed content
-
-error[E0621]: explicit lifetime required in the type of `ss`
-  --> $DIR/object-lifetime-default-from-box-error.rs:41:5
-   |
-LL | fn store1<'b>(ss: &mut SomeStruct, b: Box<SomeTrait+'b>) {
-   |                   --------------- help: add explicit lifetime `'b` to the type of `ss`: `&mut SomeStruct<'b>`
-...
-LL |     ss.r = b; //~ ERROR 41:12: 41:13: explicit lifetime required in the type of `ss` [E0621]
-   |     ^^^^ lifetime `'b` required
-
-error: aborting due to 3 previous errors
-
-Some errors occurred: E0507, E0621.
-For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-box-error.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-box-error.nll.stderr
deleted file mode 100644
index a6bfcf1d3699..000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-box-error.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-from-rptr-box-error.rs:25:5
-   |
-LL | fn c<'a>(t: &'a Box<Test+'a>, mut ss: SomeStruct<'a>) {
-   |      -- lifetime `'a` defined here
-LL |     ss.t = t; //~ ERROR mismatched types
-   |     ^^^^^^^^ assignment requires that `'a` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-struct-error.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-struct-error.nll.stderr
deleted file mode 100644
index 396ff1302b15..000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-struct-error.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-from-rptr-struct-error.rs:31:5
-   |
-LL | fn c<'a>(t: &'a MyBox<Test+'a>, mut ss: SomeStruct<'a>) {
-   |      -- lifetime `'a` defined here
-LL |     ss.t = t; //~ ERROR mismatched types
-   |     ^^^^^^^^ assignment requires that `'a` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-mybox.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-mybox.nll.stderr
deleted file mode 100644
index 41988b31e974..000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-mybox.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-mybox.rs:37:5
-   |
-LL | fn load1<'a,'b>(a: &'a MyBox<SomeTrait>,
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-...
-LL |     a //~ ERROR lifetime mismatch
-   |     ^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: borrowed data escapes outside of function
-  --> $DIR/object-lifetime-default-mybox.rs:41:5
-   |
-LL | fn load2<'a>(ss: &MyBox<SomeTrait+'a>) -> MyBox<SomeTrait+'a> {
-   |              -- `ss` is a reference that is only valid in the function body
-LL |     load0(ss) //~ ERROR mismatched types
-   |     ^^^^^^^^^ `ss` escapes the function body here
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/region-invariant-static-error-reporting.nll.stderr b/src/test/ui/regions/region-invariant-static-error-reporting.nll.stderr
deleted file mode 100644
index c9714de1f097..000000000000
--- a/src/test/ui/regions/region-invariant-static-error-reporting.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/region-invariant-static-error-reporting.rs:25:9
-   |
-LL | fn unify<'a>(x: Option<Invariant<'a>>, f: fn(Invariant<'a>)) {
-   |              - `x` is a reference that is only valid in the function body
-LL |     let bad = if x.is_some() {
-LL |         x.unwrap()
-   |         ^^^^^^^^^^ `x` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/region-lifetime-bounds-on-fns-where-clause.nll.stderr b/src/test/ui/regions/region-lifetime-bounds-on-fns-where-clause.nll.stderr
deleted file mode 100644
index 01bc022acb1c..000000000000
--- a/src/test/ui/regions/region-lifetime-bounds-on-fns-where-clause.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/region-lifetime-bounds-on-fns-where-clause.rs:30:43
-   |
-LL |     let _: fn(&mut &isize, &mut &isize) = a; //~ ERROR mismatched types
-   |                                           ^ expected concrete lifetime, found bound lifetime parameter
-   |
-   = note: expected type `for<'r, 's, 't0, 't1> fn(&'r mut &'s isize, &'t0 mut &'t1 isize)`
-              found type `for<'r, 's> fn(&'r mut &isize, &'s mut &isize) {a::<'_, '_>}`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/regions/region-multiple-lifetime-bounds-on-fns-where-clause.nll.stderr b/src/test/ui/regions/region-multiple-lifetime-bounds-on-fns-where-clause.nll.stderr
deleted file mode 100644
index 44f8f9e46f3f..000000000000
--- a/src/test/ui/regions/region-multiple-lifetime-bounds-on-fns-where-clause.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/region-multiple-lifetime-bounds-on-fns-where-clause.rs:32:56
-   |
-LL |     let _: fn(&mut &isize, &mut &isize, &mut &isize) = a; //~ ERROR mismatched types
-   |                                                        ^ expected concrete lifetime, found bound lifetime parameter
-   |
-   = note: expected type `for<'r, 's, 't0, 't1, 't2, 't3> fn(&'r mut &'s isize, &'t0 mut &'t1 isize, &'t2 mut &'t3 isize)`
-              found type `for<'r, 's, 't0> fn(&'r mut &isize, &'s mut &isize, &'t0 mut &isize) {a::<'_, '_, '_>}`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/regions/region-object-lifetime-2.nll.stderr b/src/test/ui/regions/region-object-lifetime-2.nll.stderr
deleted file mode 100644
index 4e1b8b7e1a07..000000000000
--- a/src/test/ui/regions/region-object-lifetime-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/region-object-lifetime-2.rs:20:5
-   |
-LL | fn borrowed_receiver_different_lifetimes<'a,'b>(x: &'a Foo) -> &'b () {
-   |                                          -- -- lifetime `'b` defined here
-   |                                          |
-   |                                          lifetime `'a` defined here
-LL |     x.borrowed() //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/region-object-lifetime-4.nll.stderr b/src/test/ui/regions/region-object-lifetime-4.nll.stderr
deleted file mode 100644
index 5f1f70dfe193..000000000000
--- a/src/test/ui/regions/region-object-lifetime-4.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/region-object-lifetime-4.rs:22:5
-   |
-LL | fn borrowed_receiver_related_lifetimes2<'a,'b>(x: &'a (Foo+'b)) -> &'b () {
-   |                                         -- -- lifetime `'b` defined here
-   |                                         |
-   |                                         lifetime `'a` defined here
-LL |     x.borrowed() //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/region-object-lifetime-in-coercion.nll.stderr b/src/test/ui/regions/region-object-lifetime-in-coercion.nll.stderr
deleted file mode 100644
index 8fd195639fec..000000000000
--- a/src/test/ui/regions/region-object-lifetime-in-coercion.nll.stderr
+++ /dev/null
@@ -1,38 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/region-object-lifetime-in-coercion.rs:18:12
-   |
-LL | fn a(v: &[u8]) -> Box<Foo + 'static> {
-   |         ----- help: add explicit lifetime `'static` to the type of `v`: `&'static [u8]`
-LL |     let x: Box<Foo + 'static> = Box::new(v);
-   |            ^^^^^^^^^^^^^^^^^^ lifetime `'static` required
-
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/region-object-lifetime-in-coercion.rs:24:5
-   |
-LL | fn b(v: &[u8]) -> Box<Foo + 'static> {
-   |         ----- help: add explicit lifetime `'static` to the type of `v`: `&'static [u8]`
-LL |     Box::new(v)
-   |     ^^^^^^^^^^^ lifetime `'static` required
-
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/region-object-lifetime-in-coercion.rs:31:5
-   |
-LL | fn c(v: &[u8]) -> Box<Foo> {
-   |         ----- help: add explicit lifetime `'static` to the type of `v`: `&'static [u8]`
-...
-LL |     Box::new(v)
-   |     ^^^^^^^^^^^ lifetime `'static` required
-
-error: unsatisfied lifetime constraints
-  --> $DIR/region-object-lifetime-in-coercion.rs:36:5
-   |
-LL | fn d<'a,'b>(v: &'a [u8]) -> Box<Foo+'b> {
-   |      -- -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-LL |     Box::new(v)
-   |     ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/regions/regions-addr-of-self.nll.stderr b/src/test/ui/regions/regions-addr-of-self.nll.stderr
deleted file mode 100644
index 1454c856f978..000000000000
--- a/src/test/ui/regions/regions-addr-of-self.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-self.rs:17:16
-   |
-LL |     pub fn chase_cat(&mut self) {
-   |                      - let's call the lifetime of this reference `'1`
-LL |         let p: &'static mut usize = &mut self.cats_chased; //~ ERROR cannot infer
-   |                ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-addr-of-upvar-self.nll.stderr b/src/test/ui/regions/regions-addr-of-upvar-self.nll.stderr
deleted file mode 100644
index 0e48192eaffc..000000000000
--- a/src/test/ui/regions/regions-addr-of-upvar-self.nll.stderr
+++ /dev/null
@@ -1,47 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-upvar-self.rs:20:20
-   |
-LL |         let _f = || {
-   |                  -- lifetime `'1` represents this closure's body
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                    ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
-   |
-   = note: closure implements `FnMut`, so references to captured variables can't escape the closure
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-upvar-self.rs:20:20
-   |
-LL |     pub fn chase_cat(&mut self) {
-   |                      --------- lifetime `'2` appears in the type of `self`
-LL |         let _f = || {
-   |                  -- lifetime `'1` represents this closure's body
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                    ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'2`
-   |
-   = note: closure implements `FnMut`, so references to captured variables can't escape the closure
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-upvar-self.rs:20:20
-   |
-LL |     pub fn chase_cat(&mut self) {
-   |                      - let's call the lifetime of this reference `'1`
-LL |         let _f = || {
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                    ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
-
-error[E0597]: `self` does not live long enough
-  --> $DIR/regions-addr-of-upvar-self.rs:20:46
-   |
-LL |         let _f = || {
-   |                  -- value captured here
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                                              ^^^^ borrowed value does not live long enough
-...
-LL |     }
-   |      - `self` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/regions/regions-assoc-type-in-supertrait-outlives-container.nll.stderr b/src/test/ui/regions/regions-assoc-type-in-supertrait-outlives-container.nll.stderr
deleted file mode 100644
index f711541fbd5c..000000000000
--- a/src/test/ui/regions/regions-assoc-type-in-supertrait-outlives-container.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-assoc-type-in-supertrait-outlives-container.rs:52:13
-   |
-LL | fn with_assoc<'a,'b>() {
-   |               -- -- lifetime `'b` defined here
-   |               |
-   |               lifetime `'a` defined here
-...
-LL |     let _x: &'a WithAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-bounded-by-trait-requiring-static.nll.stderr b/src/test/ui/regions/regions-bounded-by-trait-requiring-static.nll.stderr
deleted file mode 100644
index 654b2b91583a..000000000000
--- a/src/test/ui/regions/regions-bounded-by-trait-requiring-static.nll.stderr
+++ /dev/null
@@ -1,50 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:32:5
-   |
-LL | fn param_not_ok<'a>(x: &'a isize) {
-   |                 -- lifetime `'a` defined here
-LL |     assert_send::<&'a isize>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:36:5
-   |
-LL | fn param_not_ok1<'a>(_: &'a isize) {
-   |                  -- lifetime `'a` defined here
-LL |     assert_send::<&'a str>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:40:5
-   |
-LL | fn param_not_ok2<'a>(_: &'a isize) {
-   |                  -- lifetime `'a` defined here
-LL |     assert_send::<&'a [isize]>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:54:5
-   |
-LL | fn box_with_region_not_ok<'a>() {
-   |                           -- lifetime `'a` defined here
-LL |     assert_send::<Box<&'a isize>>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:65:5
-   |
-LL | fn unsafe_ok2<'a>(_: &'a isize) {
-   |               -- lifetime `'a` defined here
-LL |     assert_send::<*const &'a isize>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:69:5
-   |
-LL | fn unsafe_ok3<'a>(_: &'a isize) {
-   |               -- lifetime `'a` defined here
-LL |     assert_send::<*mut &'a isize>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: aborting due to 6 previous errors
-
diff --git a/src/test/ui/regions/regions-bounded-method-type-parameters-cross-crate.nll.stderr b/src/test/ui/regions/regions-bounded-method-type-parameters-cross-crate.nll.stderr
deleted file mode 100644
index a292bacc674b..000000000000
--- a/src/test/ui/regions/regions-bounded-method-type-parameters-cross-crate.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-method-type-parameters-cross-crate.rs:30:5
-   |
-LL | fn call_bigger_region<'x, 'y>(a: Inv<'x>, b: Inv<'y>) {
-   |                       --  -- lifetime `'y` defined here
-   |                       |
-   |                       lifetime `'x` defined here
-LL |     // Here the value provided for 'y is 'y, and hence 'y:'x does not hold.
-LL |     a.bigger_region(b) //~ ERROR 30:7: 30:20: lifetime mismatch [E0623]
-   |     ^^^^^^^^^^^^^^^^^^ argument requires that `'y` must outlive `'x`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-bounded-method-type-parameters-trait-bound.nll.stderr b/src/test/ui/regions/regions-bounded-method-type-parameters-trait-bound.nll.stderr
deleted file mode 100644
index 99c31783acdc..000000000000
--- a/src/test/ui/regions/regions-bounded-method-type-parameters-trait-bound.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/regions-bounded-method-type-parameters-trait-bound.rs:30:5
-   |
-LL | fn caller2<'a,'b,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) {
-   |                             -           - `b` is a reference that is only valid in the function body
-   |                             |
-   |                             `a` is declared here, outside of the function body
-LL |     // Here the value provided for 'y is 'b, and hence 'b:'a does not hold.
-LL |     f.method(b); //~ ERROR 30:7: 30:13: lifetime mismatch [E0623]
-   |     ^^^^^^^^^^^ `b` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-bounded-method-type-parameters.nll.stderr b/src/test/ui/regions/regions-bounded-method-type-parameters.nll.stderr
deleted file mode 100644
index 91e0f7f73ee3..000000000000
--- a/src/test/ui/regions/regions-bounded-method-type-parameters.nll.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/regions-bounded-method-type-parameters.rs:22:5
-   |
-LL | fn caller<'a>(x: &isize) {
-   |                  ------ help: add explicit lifetime `'a` to the type of `x`: `&'a isize`
-LL |     Foo.some_method::<&'a isize>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime `'a` required
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-method-type-parameters.rs:22:5
-   |
-LL | fn caller<'a>(x: &isize) {
-   |           -- lifetime `'a` defined here
-LL |     Foo.some_method::<&'a isize>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/regions/regions-bounds.nll.stderr b/src/test/ui/regions/regions-bounds.nll.stderr
deleted file mode 100644
index e50e806da12a..000000000000
--- a/src/test/ui/regions/regions-bounds.nll.stderr
+++ /dev/null
@@ -1,22 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounds.rs:19:12
-   |
-LL | fn a_fn1<'a,'b>(e: an_enum<'a>) -> an_enum<'b> {
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     return e; //~ ERROR mismatched types
-   |            ^ returning this value requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounds.rs:23:12
-   |
-LL | fn a_fn3<'a,'b>(e: a_class<'a>) -> a_class<'b> {
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     return e; //~ ERROR mismatched types
-   |            ^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/regions-close-associated-type-into-object.nll.stderr b/src/test/ui/regions/regions-close-associated-type-into-object.nll.stderr
deleted file mode 100644
index 90d38a49c4a8..000000000000
--- a/src/test/ui/regions/regions-close-associated-type-into-object.nll.stderr
+++ /dev/null
@@ -1,36 +0,0 @@
-error[E0310]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:25:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'static`...
-
-error[E0310]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:32:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'static`...
-
-error[E0309]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:38:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'a`...
-
-error[E0309]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:45:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'a`...
-
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0309, E0310.
-For more information about an error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-close-object-into-object-2.nll.stderr b/src/test/ui/regions/regions-close-object-into-object-2.nll.stderr
deleted file mode 100644
index c073e3728e70..000000000000
--- a/src/test/ui/regions/regions-close-object-into-object-2.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-close-object-into-object-2.rs:20:5
-   |
-LL | fn g<'a, T: 'static>(v: Box<A<T>+'a>) -> Box<X+'static> {
-   |      -- lifetime `'a` defined here
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error[E0597]: `*v` does not live long enough
-  --> $DIR/regions-close-object-into-object-2.rs:20:11
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |           ^^^ borrowed value does not live long enough
-LL | }
-   | - `*v` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/regions/regions-close-object-into-object-4.nll.stderr b/src/test/ui/regions/regions-close-object-into-object-4.nll.stderr
deleted file mode 100644
index 4b47b951d771..000000000000
--- a/src/test/ui/regions/regions-close-object-into-object-4.nll.stderr
+++ /dev/null
@@ -1,38 +0,0 @@
-error[E0310]: the parameter type `U` may not live long enough
-  --> $DIR/regions-close-object-into-object-4.rs:20:5
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |     ^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `U: 'static`...
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-close-object-into-object-4.rs:20:5
-   |
-LL | fn i<'a, T, U>(v: Box<A<U>+'a>) -> Box<X+'static> {
-   |      -- lifetime `'a` defined here
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error[E0310]: the parameter type `U` may not live long enough
-  --> $DIR/regions-close-object-into-object-4.rs:20:9
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |         ^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `U: 'static`...
-
-error[E0597]: `*v` does not live long enough
-  --> $DIR/regions-close-object-into-object-4.rs:20:11
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |           ^^^ borrowed value does not live long enough
-LL | }
-   | - `*v` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0310, E0597.
-For more information about an error, try `rustc --explain E0310`.
diff --git a/src/test/ui/regions/regions-close-object-into-object-5.nll.stderr b/src/test/ui/regions/regions-close-object-into-object-5.nll.stderr
deleted file mode 100644
index 8ef80fd775bf..000000000000
--- a/src/test/ui/regions/regions-close-object-into-object-5.nll.stderr
+++ /dev/null
@@ -1,31 +0,0 @@
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-object-into-object-5.rs:27:5
-   |
-LL |     box B(&*v) as Box<X>
-   |     ^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-object-into-object-5.rs:27:9
-   |
-LL |     box B(&*v) as Box<X>
-   |         ^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0597]: `*v` does not live long enough
-  --> $DIR/regions-close-object-into-object-5.rs:27:11
-   |
-LL |     box B(&*v) as Box<X>
-   |           ^^^ borrowed value does not live long enough
-...
-LL | }
-   | - `*v` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 3 previous errors
-
-Some errors occurred: E0310, E0597.
-For more information about an error, try `rustc --explain E0310`.
diff --git a/src/test/ui/regions/regions-close-over-type-parameter-1.nll.stderr b/src/test/ui/regions/regions-close-over-type-parameter-1.nll.stderr
deleted file mode 100644
index 6b8406cdb6e5..000000000000
--- a/src/test/ui/regions/regions-close-over-type-parameter-1.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error[E0310]: the parameter type `A` may not live long enough
-  --> $DIR/regions-close-over-type-parameter-1.rs:20:5
-   |
-LL |     box v as Box<SomeTrait+'static>
-   |     ^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'static`...
-
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-close-over-type-parameter-1.rs:30:5
-   |
-LL |     box v as Box<SomeTrait+'b>
-   |     ^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'b`...
-
-error: aborting due to 2 previous errors
-
-Some errors occurred: E0309, E0310.
-For more information about an error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-close-over-type-parameter-multiple.nll.stderr b/src/test/ui/regions/regions-close-over-type-parameter-multiple.nll.stderr
deleted file mode 100644
index 017e91268884..000000000000
--- a/src/test/ui/regions/regions-close-over-type-parameter-multiple.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-close-over-type-parameter-multiple.rs:30:5
-   |
-LL |     box v as Box<SomeTrait+'a> //~ ERROR cannot infer an appropriate lifetime
-   |     ^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'c`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-close-param-into-object.nll.stderr b/src/test/ui/regions/regions-close-param-into-object.nll.stderr
deleted file mode 100644
index c1c7e1b71c98..000000000000
--- a/src/test/ui/regions/regions-close-param-into-object.nll.stderr
+++ /dev/null
@@ -1,36 +0,0 @@
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:16:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:22:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:28:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'a`...
-
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:34:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'a`...
-
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0309, E0310.
-For more information about an error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-creating-enums3.nll.stderr b/src/test/ui/regions/regions-creating-enums3.nll.stderr
deleted file mode 100644
index aeb4fc67f55e..000000000000
--- a/src/test/ui/regions/regions-creating-enums3.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-creating-enums3.rs:17:5
-   |
-LL | fn mk_add_bad1<'a,'b>(x: &'a ast<'a>, y: &'b ast<'b>) -> ast<'a> {
-   |                -- -- lifetime `'b` defined here
-   |                |
-   |                lifetime `'a` defined here
-LL |     ast::add(x, y) //~ ERROR 17:5: 17:19: lifetime mismatch [E0623]
-   |     ^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-creating-enums4.nll.stderr b/src/test/ui/regions/regions-creating-enums4.nll.stderr
deleted file mode 100644
index 9c68c9bca49f..000000000000
--- a/src/test/ui/regions/regions-creating-enums4.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-creating-enums4.rs:17:5
-   |
-LL | fn mk_add_bad2<'a,'b>(x: &'a ast<'a>, y: &'a ast<'a>, z: &ast) -> ast<'b> {
-   |                -- -- lifetime `'b` defined here
-   |                |
-   |                lifetime `'a` defined here
-LL |     ast::add(x, y) //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-early-bound-error-method.nll.stderr b/src/test/ui/regions/regions-early-bound-error-method.nll.stderr
deleted file mode 100644
index e6c60b301a04..000000000000
--- a/src/test/ui/regions/regions-early-bound-error-method.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-early-bound-error-method.rs:30:9
-   |
-LL | impl<'a> Box<'a> {
-   |      -- lifetime `'a` defined here
-LL |     fn or<'b,G:GetRef<'b>>(&self, g2: G) -> &'a isize {
-   |           -- lifetime `'b` defined here
-LL |         g2.get()
-   |         ^^^^^^^^ returning this value requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-early-bound-error.nll.stderr b/src/test/ui/regions/regions-early-bound-error.nll.stderr
deleted file mode 100644
index 3c95e977fb36..000000000000
--- a/src/test/ui/regions/regions-early-bound-error.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-early-bound-error.rs:29:5
-   |
-LL | fn get<'a,'b,G:GetRef<'a, isize>>(g1: G, b: &'b isize) -> &'b isize {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |     g1.get()
-   |     ^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-escape-method.nll.stderr b/src/test/ui/regions/regions-escape-method.nll.stderr
deleted file mode 100644
index ffcd1b6bd7b3..000000000000
--- a/src/test/ui/regions/regions-escape-method.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-escape-method.rs:25:13
-   |
-LL |     s.f(|p| p) //~ ERROR cannot infer
-   |          -- ^ returning this value requires that `'1` must outlive `'2`
-   |          ||
-   |          |return type of closure is &'2 i32
-   |          has type `&'1 i32`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-escape-via-trait-or-not.nll.stderr b/src/test/ui/regions/regions-escape-via-trait-or-not.nll.stderr
deleted file mode 100644
index 36a79d52fd00..000000000000
--- a/src/test/ui/regions/regions-escape-via-trait-or-not.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-escape-via-trait-or-not.rs:28:14
-   |
-LL |     with(|o| o) //~ ERROR cannot infer
-   |           -- ^ returning this value requires that `'1` must outlive `'2`
-   |           ||
-   |           |return type of closure is &'2 isize
-   |           has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-free-region-ordering-callee.nll.stderr b/src/test/ui/regions/regions-free-region-ordering-callee.nll.stderr
deleted file mode 100644
index d06062957131..000000000000
--- a/src/test/ui/regions/regions-free-region-ordering-callee.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-callee.rs:23:5
-   |
-LL | fn ordering2<'a, 'b>(x: &'a &'b usize, y: &'a usize) -> &'b usize {
-   |              --  -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-LL |     // However, it is not safe to assume that 'b <= 'a
-LL |     &*y //~ ERROR 23:5: 23:8: lifetime mismatch [E0623]
-   |     ^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-callee.rs:28:24
-   |
-LL | fn ordering3<'a, 'b>(x: &'a usize, y: &'b usize) -> &'a &'b usize {
-   |              --  -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-LL |     // Do not infer an ordering from the return value.
-LL |     let z: &'b usize = &*x;
-   |                        ^^^ assignment requires that `'a` must outlive `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/regions-free-region-ordering-caller.nll.stderr b/src/test/ui/regions/regions-free-region-ordering-caller.nll.stderr
deleted file mode 100644
index 8d4f3d1e87fb..000000000000
--- a/src/test/ui/regions/regions-free-region-ordering-caller.nll.stderr
+++ /dev/null
@@ -1,33 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-caller.rs:18:12
-   |
-LL | fn call2<'a, 'b>(a: &'a usize, b: &'b usize) {
-   |          --  -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     let z: Option<&'b &'a usize> = None;//~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-caller.rs:23:12
-   |
-LL | fn call3<'a, 'b>(a: &'a usize, b: &'b usize) {
-   |          --  -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     let y: Paramd<'a> = Paramd { x: a };
-LL |     let z: Option<&'b Paramd<'a>> = None;//~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-caller.rs:27:12
-   |
-LL | fn call4<'a, 'b>(a: &'a usize, b: &'b usize) {
-   |          --  -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     let z: Option<&'a &'b usize> = None;//~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to 3 previous errors
-
diff --git a/src/test/ui/regions/regions-free-region-ordering-incorrect.nll.stderr b/src/test/ui/regions/regions-free-region-ordering-incorrect.nll.stderr
deleted file mode 100644
index 10259ccf270e..000000000000
--- a/src/test/ui/regions/regions-free-region-ordering-incorrect.nll.stderr
+++ /dev/null
@@ -1,15 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-incorrect.rs:25:5
-   |
-LL |   impl<'b, T> Node<'b, T> {
-   |        -- lifetime `'b` defined here
-LL |     fn get<'a>(&'a self) -> &'b T {
-   |            -- lifetime `'a` defined here
-LL | /     match self.next {
-LL | |       Some(ref next) => next.get(),
-LL | |       None => &self.val //~ ERROR cannot infer
-LL | |     }
-   | |_____^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-implied-bounds-projection-gap-1.nll.stderr b/src/test/ui/regions/regions-implied-bounds-projection-gap-1.nll.stderr
deleted file mode 100644
index 2eb4ccf1c35f..000000000000
--- a/src/test/ui/regions/regions-implied-bounds-projection-gap-1.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-implied-bounds-projection-gap-1.rs:26:5
-   |
-LL |     wf::<&'x T>();
-   |     ^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'x`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-infer-bound-from-trait-self.nll.stderr b/src/test/ui/regions/regions-infer-bound-from-trait-self.nll.stderr
deleted file mode 100644
index 9fc58273c941..000000000000
--- a/src/test/ui/regions/regions-infer-bound-from-trait-self.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the parameter type `Self` may not live long enough
-  --> $DIR/regions-infer-bound-from-trait-self.rs:56:9
-   |
-LL |         check_bound(x, self)
-   |         ^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `Self: 'a`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-infer-bound-from-trait.nll.stderr b/src/test/ui/regions/regions-infer-bound-from-trait.nll.stderr
deleted file mode 100644
index ace8f14c734a..000000000000
--- a/src/test/ui/regions/regions-infer-bound-from-trait.nll.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-infer-bound-from-trait.rs:43:5
-   |
-LL |     check_bound(x, a) //~ ERROR parameter type `A` may not live long enough
-   |     ^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'a`...
-
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-infer-bound-from-trait.rs:47:5
-   |
-LL |     check_bound(x, a) //~ ERROR parameter type `A` may not live long enough
-   |     ^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'a`...
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-infer-call-3.nll.stderr b/src/test/ui/regions/regions-infer-call-3.nll.stderr
deleted file mode 100644
index 30b892d3710f..000000000000
--- a/src/test/ui/regions/regions-infer-call-3.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-call-3.rs:18:24
-   |
-LL |     let z = with(|y| { select(x, y) });
-   |                   --   ^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'2`
-   |                   ||
-   |                   |return type of closure is &'2 isize
-   |                   has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-contravariance-due-to-decl.nll.stderr b/src/test/ui/regions/regions-infer-contravariance-due-to-decl.nll.stderr
deleted file mode 100644
index aba285d427b4..000000000000
--- a/src/test/ui/regions/regions-infer-contravariance-due-to-decl.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-contravariance-due-to-decl.rs:35:12
-   |
-LL | fn use_<'short,'long>(c: Contravariant<'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Contravariant<'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-covariance-due-to-decl.nll.stderr b/src/test/ui/regions/regions-infer-covariance-due-to-decl.nll.stderr
deleted file mode 100644
index 8bc6d565cf1b..000000000000
--- a/src/test/ui/regions/regions-infer-covariance-due-to-decl.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-covariance-due-to-decl.rs:32:12
-   |
-LL | fn use_<'short,'long>(c: Covariant<'long>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Covariant<'short> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-invariance-due-to-decl.nll.stderr b/src/test/ui/regions/regions-infer-invariance-due-to-decl.nll.stderr
deleted file mode 100644
index 23a719e5503a..000000000000
--- a/src/test/ui/regions/regions-infer-invariance-due-to-decl.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-invariance-due-to-decl.rs:22:5
-   |
-LL | fn to_longer_lifetime<'r>(b_isize: invariant<'r>) -> invariant<'static> {
-   |                       -- lifetime `'r` defined here
-LL |     b_isize //~ ERROR mismatched types
-   |     ^^^^^^^ returning this value requires that `'r` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-3.nll.stderr b/src/test/ui/regions/regions-infer-invariance-due-to-mutability-3.nll.stderr
deleted file mode 100644
index ff0a6adec049..000000000000
--- a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-3.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-invariance-due-to-mutability-3.rs:21:5
-   |
-LL | fn to_longer_lifetime<'r>(b_isize: invariant<'r>) -> invariant<'static> {
-   |                       -- lifetime `'r` defined here
-LL |     b_isize //~ ERROR mismatched types
-   |     ^^^^^^^ returning this value requires that `'r` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-4.nll.stderr b/src/test/ui/regions/regions-infer-invariance-due-to-mutability-4.nll.stderr
deleted file mode 100644
index c296397954a7..000000000000
--- a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-4.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-invariance-due-to-mutability-4.rs:21:5
-   |
-LL | fn to_longer_lifetime<'r>(b_isize: Invariant<'r>) -> Invariant<'static> {
-   |                       -- lifetime `'r` defined here
-LL |     b_isize //~ ERROR mismatched types
-   |     ^^^^^^^ returning this value requires that `'r` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-not-param.nll.stderr b/src/test/ui/regions/regions-infer-not-param.nll.stderr
deleted file mode 100644
index faeaa5eda02c..000000000000
--- a/src/test/ui/regions/regions-infer-not-param.nll.stderr
+++ /dev/null
@@ -1,26 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-not-param.rs:25:54
-   |
-LL | fn take_direct<'a,'b>(p: direct<'a>) -> direct<'b> { p } //~ ERROR mismatched types
-   |                -- -- lifetime `'b` defined here      ^ returning this value requires that `'a` must outlive `'b`
-   |                |
-   |                lifetime `'a` defined here
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-not-param.rs:29:63
-   |
-LL | fn take_indirect2<'a,'b>(p: indirect2<'a>) -> indirect2<'b> { p } //~ ERROR mismatched types
-   |                   -- -- lifetime `'b` defined here            ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-   |                   |
-   |                   lifetime `'a` defined here
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-not-param.rs:29:63
-   |
-LL | fn take_indirect2<'a,'b>(p: indirect2<'a>) -> indirect2<'b> { p } //~ ERROR mismatched types
-   |                   -- -- lifetime `'b` defined here            ^ returning this value requires that `'a` must outlive `'b`
-   |                   |
-   |                   lifetime `'a` defined here
-
-error: aborting due to 3 previous errors
-
diff --git a/src/test/ui/regions/regions-infer-paramd-indirect.nll.stderr b/src/test/ui/regions/regions-infer-paramd-indirect.nll.stderr
deleted file mode 100644
index 7558c5caa0e2..000000000000
--- a/src/test/ui/regions/regions-infer-paramd-indirect.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-paramd-indirect.rs:33:9
-   |
-LL | impl<'a> set_f<'a> for c<'a> {
-   |      -- lifetime `'a` defined here
-...
-LL |     fn set_f_bad(&mut self, b: Box<b>) {
-   |                             - has type `std::boxed::Box<std::boxed::Box<&'1 isize>>`
-LL |         self.f = b;
-   |         ^^^^^^ assignment requires that `'1` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-lifetime-bounds-on-fns.nll.stderr b/src/test/ui/regions/regions-lifetime-bounds-on-fns.nll.stderr
deleted file mode 100644
index d1d98a26a41f..000000000000
--- a/src/test/ui/regions/regions-lifetime-bounds-on-fns.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/regions-lifetime-bounds-on-fns.rs:30:43
-   |
-LL |     let _: fn(&mut &isize, &mut &isize) = a; //~ ERROR mismatched types
-   |                                           ^ expected concrete lifetime, found bound lifetime parameter
-   |
-   = note: expected type `for<'r, 's, 't0, 't1> fn(&'r mut &'s isize, &'t0 mut &'t1 isize)`
-              found type `for<'r, 's> fn(&'r mut &isize, &'s mut &isize) {a::<'_, '_>}`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/regions/regions-nested-fns.nll.stderr b/src/test/ui/regions/regions-nested-fns.nll.stderr
deleted file mode 100644
index cbc1e6b787db..000000000000
--- a/src/test/ui/regions/regions-nested-fns.nll.stderr
+++ /dev/null
@@ -1,49 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-nested-fns.rs:20:9
-   |
-LL |     let mut ay = &y; //~ ERROR E0495
-   |         ------ `ay` is declared here, outside of the closure body
-LL | 
-LL |     ignore::<Box<for<'z> FnMut(&'z isize)>>(Box::new(|z| {
-   |                                                       - `z` is a reference that is only valid in the closure body
-...
-LL |         ay = z;
-   |         ^^^^^^ `z` escapes the closure body here
-
-error[E0597]: `y` does not live long enough
-  --> $DIR/regions-nested-fns.rs:15:18
-   |
-LL |     let mut ay = &y; //~ ERROR E0495
-   |                  ^^ borrowed value does not live long enough
-...
-LL | }
-   | - `y` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error[E0597]: `y` does not live long enough
-  --> $DIR/regions-nested-fns.rs:19:15
-   |
-LL |     ignore::<Box<for<'z> FnMut(&'z isize)>>(Box::new(|z| {
-   |                                                      --- value captured here
-LL |         ay = x;
-LL |         ay = &y;
-   |               ^ borrowed value does not live long enough
-...
-LL | }
-   | - `y` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-nested-fns.rs:24:27
-   |
-LL | fn nested<'x>(x: &'x isize) {
-   |           -- lifetime `'x` defined here
-...
-LL |         if false { return x; } //~ ERROR E0312
-   |                           ^ returning this value requires that `'x` must outlive `'static`
-
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/regions/regions-outlives-projection-container-hrtb.nll.stderr b/src/test/ui/regions/regions-outlives-projection-container-hrtb.nll.stderr
deleted file mode 100644
index 6db1f6f4e78a..000000000000
--- a/src/test/ui/regions/regions-outlives-projection-container-hrtb.nll.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error: compilation successful
-  --> $DIR/regions-outlives-projection-container-hrtb.rs:68:1
-   |
-LL | / fn main() {
-LL | | }
-   | |_^
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr b/src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr
deleted file mode 100644
index 836f8c28a737..000000000000
--- a/src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container-wc.rs:46:13
-   |
-LL | fn with_assoc<'a,'b>() {
-   |               -- -- lifetime `'b` defined here
-   |               |
-   |               lifetime `'a` defined here
-...
-LL |     let _x: &'a WithAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-outlives-projection-container.nll.stderr b/src/test/ui/regions/regions-outlives-projection-container.nll.stderr
deleted file mode 100644
index 126f50577c84..000000000000
--- a/src/test/ui/regions/regions-outlives-projection-container.nll.stderr
+++ /dev/null
@@ -1,46 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:50:13
-   |
-LL | fn with_assoc<'a,'b>() {
-   |               -- -- lifetime `'b` defined here
-   |               |
-   |               lifetime `'a` defined here
-...
-LL |     let _x: &'a WithAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:68:13
-   |
-LL | fn without_assoc<'a,'b>() {
-   |                  -- -- lifetime `'b` defined here
-   |                  |
-   |                  lifetime `'a` defined here
-...
-LL |     let _x: &'a WithoutAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:77:5
-   |
-LL | fn call_with_assoc<'a,'b>() {
-   |                    -- -- lifetime `'b` defined here
-   |                    |
-   |                    lifetime `'a` defined here
-...
-LL |     call::<&'a WithAssoc<TheType<'b>>>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:84:5
-   |
-LL | fn call_without_assoc<'a,'b>() {
-   |                       -- -- lifetime `'b` defined here
-   |                       |
-   |                       lifetime `'a` defined here
-...
-LL |     call::<&'a WithoutAssoc<TheType<'b>>>(); //~ ERROR reference has a longer lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'b` must outlive `'a`
-
-error: aborting due to 4 previous errors
-
diff --git a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr b/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr
deleted file mode 100644
index 48cd2d5a60bc..000000000000
--- a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-reborrow-from-shorter-mut-ref-mut-ref.rs:14:5
-   |
-LL | fn copy_borrowed_ptr<'a, 'b, 'c>(p: &'a mut &'b mut &'c mut isize) -> &'b mut isize {
-   |                      --  -- lifetime `'b` defined here
-   |                      |
-   |                      lifetime `'a` defined here
-LL |     &mut ***p //~ ERROR 14:5: 14:14: lifetime mismatch [E0623]
-   |     ^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref.nll.stderr b/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref.nll.stderr
deleted file mode 100644
index 02c7ce33aaba..000000000000
--- a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-reborrow-from-shorter-mut-ref.rs:16:5
-   |
-LL | fn copy_borrowed_ptr<'a, 'b>(p: &'a mut &'b mut isize) -> &'b mut isize {
-   |                      --  -- lifetime `'b` defined here
-   |                      |
-   |                      lifetime `'a` defined here
-LL |     &mut **p //~ ERROR 16:5: 16:13: lifetime mismatch [E0623]
-   |     ^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-ret-borrowed-1.nll.stderr b/src/test/ui/regions/regions-ret-borrowed-1.nll.stderr
deleted file mode 100644
index 5df6bca72fa0..000000000000
--- a/src/test/ui/regions/regions-ret-borrowed-1.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-ret-borrowed-1.rs:20:14
-   |
-LL |     with(|o| o)
-   |           -- ^ returning this value requires that `'1` must outlive `'2`
-   |           ||
-   |           |return type of closure is &'2 isize
-   |           has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-ret-borrowed.nll.stderr b/src/test/ui/regions/regions-ret-borrowed.nll.stderr
deleted file mode 100644
index b36191ada61c..000000000000
--- a/src/test/ui/regions/regions-ret-borrowed.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-ret-borrowed.rs:23:14
-   |
-LL |     with(|o| o)
-   |           -- ^ returning this value requires that `'1` must outlive `'2`
-   |           ||
-   |           |return type of closure is &'2 isize
-   |           has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.nll.stderr b/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.nll.stderr
deleted file mode 100644
index 300a56398225..000000000000
--- a/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: captured variable cannot escape `FnMut` closure body
-  --> $DIR/regions-return-ref-to-upvar-issue-17403.rs:17:24
-   |
-LL |         let mut f = || &mut x; //~ ERROR cannot infer
-   |                      - ^^^^^^ returns a reference to a captured variable which escapes the closure body
-   |                      |
-   |                      inferred to be a `FnMut` closure
-   |
-   = note: `FnMut` closures only have access to their captured variables while they are executing...
-   = note: ...therefore, they cannot allow references to captured variables to escape
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-static-bound.ll.nll.stderr b/src/test/ui/regions/regions-static-bound.ll.nll.stderr
deleted file mode 100644
index dc3a32cec6ac..000000000000
--- a/src/test/ui/regions/regions-static-bound.ll.nll.stderr
+++ /dev/null
@@ -1,49 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-static-bound.rs:19:5
-   |
-LL | fn static_id_wrong_way<'a>(t: &'a ()) -> &'static () where 'static: 'a {
-   |                        -- lifetime `'a` defined here
-LL |     t //[ll]~ ERROR E0312
-   |     ^ returning this value requires that `'a` must outlive `'static`
-
-error[E0621]: explicit lifetime required in the type of `u`
-  --> $DIR/regions-static-bound.rs:24:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |             --- help: add explicit lifetime `'static` to the type of `u`: `&'static ()`
-LL |     static_id(&u); //[ll]~ ERROR explicit lifetime required in the type of `u` [E0621]
-   |     ^^^^^^^^^^^^^ lifetime `'static` required
-
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/regions-static-bound.rs:27:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |                     --- help: add explicit lifetime `'static` to the type of `v`: `&'static ()`
-...
-LL |     static_id_indirect(&v); //[ll]~ ERROR explicit lifetime required in the type of `v` [E0621]
-   |     ^^^^^^^^^^^^^^^^^^^^^^ lifetime `'static` required
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-static-bound.rs:24:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |             -       - let's call the lifetime of this reference `'2`
-   |             |
-   |             let's call the lifetime of this reference `'1`
-LL |     static_id(&u); //[ll]~ ERROR explicit lifetime required in the type of `u` [E0621]
-   |     ^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-static-bound.rs:27:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |             -       - let's call the lifetime of this reference `'1`
-   |             |
-   |             let's call the lifetime of this reference `'2`
-...
-LL |     static_id_indirect(&v); //[ll]~ ERROR explicit lifetime required in the type of `v` [E0621]
-   |     ^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 5 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/regions/regions-trait-object-subtyping.nll.stderr b/src/test/ui/regions/regions-trait-object-subtyping.nll.stderr
deleted file mode 100644
index 0a9bcee1ce29..000000000000
--- a/src/test/ui/regions/regions-trait-object-subtyping.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-trait-object-subtyping.rs:25:5
-   |
-LL | fn foo3<'a,'b>(x: &'a mut Dummy) -> &'b mut Dummy {
-   |         -- -- lifetime `'b` defined here
-   |         |
-   |         lifetime `'a` defined here
-LL |     // Without knowing 'a:'b, we can't coerce
-LL |     x //~ ERROR lifetime bound not satisfied
-   |     ^ cast requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-trait-object-subtyping.rs:32:5
-   |
-LL | fn foo4<'a:'b,'b>(x: Wrapper<&'a mut Dummy>) -> Wrapper<&'b mut Dummy> {
-   |         --    -- lifetime `'b` defined here
-   |         |
-   |         lifetime `'a` defined here
-LL |     // We can't coerce because it is packed in `Wrapper`
-LL |     x //~ ERROR mismatched types
-   |     ^ returning this value requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/regions-variance-contravariant-use-covariant-in-second-position.nll.stderr b/src/test/ui/regions/regions-variance-contravariant-use-covariant-in-second-position.nll.stderr
deleted file mode 100644
index 668b75f5733a..000000000000
--- a/src/test/ui/regions/regions-variance-contravariant-use-covariant-in-second-position.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-contravariant-use-covariant-in-second-position.rs:35:12
-   |
-LL | fn use_<'short,'long>(c: S<'long, 'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: S<'long, 'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-contravariant-use-covariant.nll.stderr b/src/test/ui/regions/regions-variance-contravariant-use-covariant.nll.stderr
deleted file mode 100644
index 5d787e6dab69..000000000000
--- a/src/test/ui/regions/regions-variance-contravariant-use-covariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-contravariant-use-covariant.rs:33:12
-   |
-LL | fn use_<'short,'long>(c: Contravariant<'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Contravariant<'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-covariant-use-contravariant.nll.stderr b/src/test/ui/regions/regions-variance-covariant-use-contravariant.nll.stderr
deleted file mode 100644
index 3fb290096686..000000000000
--- a/src/test/ui/regions/regions-variance-covariant-use-contravariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-covariant-use-contravariant.rs:33:12
-   |
-LL | fn use_<'short,'long>(c: Covariant<'long>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Covariant<'short> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-invariant-use-contravariant.nll.stderr b/src/test/ui/regions/regions-variance-invariant-use-contravariant.nll.stderr
deleted file mode 100644
index fb59ec1ca100..000000000000
--- a/src/test/ui/regions/regions-variance-invariant-use-contravariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-invariant-use-contravariant.rs:30:12
-   |
-LL | fn use_<'short,'long>(c: Invariant<'long>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Invariant<'short> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr b/src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr
deleted file mode 100644
index daf6a79136a5..000000000000
--- a/src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-invariant-use-covariant.rs:27:12
-   |
-LL | fn use_<'b>(c: Invariant<'b>) {
-   |         -- lifetime `'b` defined here
-...
-LL |     let _: Invariant<'static> = c; //~ ERROR mismatched types
-   |            ^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/static/static-items-cant-move.nll.stderr b/src/test/ui/static/static-items-cant-move.nll.stderr
new file mode 100644
index 000000000000..35a400b15089
--- /dev/null
+++ b/src/test/ui/static/static-items-cant-move.nll.stderr
@@ -0,0 +1,18 @@
+error[E0507]: cannot move out of static item
+  --> $DIR/static-items-cant-move.rs:28:10
+   |
+LL |     test(BAR); //~ ERROR cannot move out of static item
+   |          ^^^ cannot move out of static item
+
+error[E0507]: cannot move out of immutable static item `BAR`
+  --> $DIR/static-items-cant-move.rs:28:10
+   |
+LL |     test(BAR); //~ ERROR cannot move out of static item
+   |          ^^^
+   |          |
+   |          cannot move out of immutable static item `BAR`
+   |          cannot move
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/std-uncopyable-atomics.nll.stderr b/src/test/ui/std-uncopyable-atomics.nll.stderr
index e6b612fed858..d2576a4baf36 100644
--- a/src/test/ui/std-uncopyable-atomics.nll.stderr
+++ b/src/test/ui/std-uncopyable-atomics.nll.stderr
@@ -7,6 +7,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:19:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/std-uncopyable-atomics.rs:21:13
    |
@@ -16,6 +25,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:21:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/std-uncopyable-atomics.rs:23:13
    |
@@ -25,6 +43,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:23:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/std-uncopyable-atomics.rs:25:13
    |
@@ -34,6 +61,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:25:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
+error: aborting due to 8 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/thread-local-in-ctfe.nll.stderr b/src/test/ui/thread-local-in-ctfe.nll.stderr
index c9c0ac2b2d94..05f8f3433800 100644
--- a/src/test/ui/thread-local-in-ctfe.nll.stderr
+++ b/src/test/ui/thread-local-in-ctfe.nll.stderr
@@ -10,13 +10,17 @@ error[E0625]: thread-local statics cannot be accessed at compile-time
 LL | static C: &u32 = &A;
    |                  ^^
 
-error[E0712]: thread-local variable borrowed past end of function
+warning[E0712]: thread-local variable borrowed past end of function
   --> $DIR/thread-local-in-ctfe.rs:19:18
    |
 LL | static C: &u32 = &A;
    |                  ^^- end of enclosing function is here
    |                  |
    |                  thread-local variables cannot be borrowed beyond the end of the function
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0625]: thread-local statics cannot be accessed at compile-time
   --> $DIR/thread-local-in-ctfe.rs:22:16
@@ -30,13 +34,17 @@ error[E0625]: thread-local statics cannot be accessed at compile-time
 LL | const E: &u32 = &A;
    |                 ^^
 
-error[E0712]: thread-local variable borrowed past end of function
+warning[E0712]: thread-local variable borrowed past end of function
   --> $DIR/thread-local-in-ctfe.rs:25:17
    |
 LL | const E: &u32 = &A;
    |                 ^^- end of enclosing function is here
    |                 |
    |                 thread-local variables cannot be borrowed beyond the end of the function
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0625]: thread-local statics cannot be accessed at compile-time
   --> $DIR/thread-local-in-ctfe.rs:29:5
@@ -44,7 +52,7 @@ error[E0625]: thread-local statics cannot be accessed at compile-time
 LL |     A
    |     ^
 
-error: aborting due to 7 previous errors
+error: aborting due to 5 previous errors
 
 Some errors occurred: E0625, E0712.
 For more information about an error, try `rustc --explain E0625`.
diff --git a/src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr b/src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr
new file mode 100644
index 000000000000..9f56bf053843
--- /dev/null
+++ b/src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr
@@ -0,0 +1,20 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/trivial-bounds-leak-copy.rs:19:5
+   |
+LL |     *t //~ ERROR
+   |     ^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of `*t` which is behind a `&` reference
+  --> $DIR/trivial-bounds-leak-copy.rs:19:5
+   |
+LL | fn move_out_string(t: &String) -> String {
+   |                       ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     *t //~ ERROR
+   |     ^^
+   |     |
+   |     cannot move out of `*t` which is behind a `&` reference
+   |     `t` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr
index 4baa54e34c75..625084efec2f 100644
--- a/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr
@@ -6,6 +6,21 @@ LL |         let x = Box::new(0);
 LL |         let f = to_fn(|| drop(x)); //~ ERROR cannot move
    |                               ^ cannot move out of captured variable in an `Fn` closure
 
+error[E0507]: cannot move out of `x`, as it is a captured variable in a `Fn` closure
+  --> $DIR/unboxed-closure-illegal-move.rs:25:31
+   |
+LL |         let f = to_fn(|| drop(x)); //~ ERROR cannot move
+   |                               ^
+   |                               |
+   |                               cannot move out of `x`, as it is a captured variable in a `Fn` closure
+   |                               cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/unboxed-closure-illegal-move.rs:25:23
+   |
+LL |         let f = to_fn(|| drop(x)); //~ ERROR cannot move
+   |                       ^^^^^^^^^^
+
 error[E0507]: cannot move out of captured variable in an `FnMut` closure
   --> $DIR/unboxed-closure-illegal-move.rs:29:35
    |
@@ -22,6 +37,21 @@ LL |         let x = Box::new(0);
 LL |         let f = to_fn(move || drop(x)); //~ ERROR cannot move
    |                                    ^ cannot move out of captured variable in an `Fn` closure
 
+error[E0507]: cannot move out of `x`, as it is a captured variable in a `Fn` closure
+  --> $DIR/unboxed-closure-illegal-move.rs:38:36
+   |
+LL |         let f = to_fn(move || drop(x)); //~ ERROR cannot move
+   |                                    ^
+   |                                    |
+   |                                    cannot move out of `x`, as it is a captured variable in a `Fn` closure
+   |                                    cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/unboxed-closure-illegal-move.rs:38:23
+   |
+LL |         let f = to_fn(move || drop(x)); //~ ERROR cannot move
+   |                       ^^^^^^^^^^^^^^^
+
 error[E0507]: cannot move out of captured variable in an `FnMut` closure
   --> $DIR/unboxed-closure-illegal-move.rs:42:40
    |
@@ -30,6 +60,6 @@ LL |         let x = Box::new(0);
 LL |         let f = to_fn_mut(move || drop(x)); //~ ERROR cannot move
    |                                        ^ cannot move out of captured variable in an `FnMut` closure
 
-error: aborting due to 4 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr
index 084d7ff3bcd6..ee91ea3b66f3 100644
--- a/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr
@@ -33,7 +33,7 @@ LL |     let x = 0;
 LL |     move || set(&mut x); //~ ERROR cannot borrow
    |                 ^^^^^^ cannot borrow as mutable
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:23:8
    |
 LL |     let x = 0;
@@ -41,8 +41,12 @@ LL |     let x = 0;
 ...
 LL |     || x = 1; //~ ERROR cannot assign
    |        ^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:25:12
    |
 LL |     let x = 0;
@@ -50,8 +54,12 @@ LL |     let x = 0;
 ...
 LL |     || set(&mut x); //~ ERROR cannot assign
    |            ^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:26:8
    |
 LL |     let x = 0;
@@ -59,8 +67,12 @@ LL |     let x = 0;
 ...
 LL |     || x = 1; //~ ERROR cannot assign
    |        ^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:28:12
    |
 LL |     let x = 0;
@@ -68,8 +80,12 @@ LL |     let x = 0;
 ...
 LL |     || set(&mut x); //~ ERROR cannot assign
    |            ^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error: aborting due to 8 previous errors
+error: aborting due to 4 previous errors
 
 Some errors occurred: E0594, E0596.
 For more information about an error, try `rustc --explain E0594`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr
deleted file mode 100644
index a3501290cd60..000000000000
--- a/src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/unboxed-closures-infer-argument-types-two-region-pointers.rs:27:9
-   |
-LL |     doit(0, &|x, y| {
-   |               -  - has type `&'1 i32`
-   |               |
-   |               has type `&std::cell::Cell<&'2 i32>`
-LL |         x.set(y); //~ ERROR E0312
-   |         ^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr
index 718c3a19938c..fa0aba96e18b 100644
--- a/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr
@@ -1,4 +1,4 @@
-error[E0596]: cannot borrow `tick1` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `tick1` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.rs:27:9
    |
 LL |     let tick1 = || {
@@ -6,6 +6,10 @@ LL |     let tick1 = || {
 ...
 LL |         tick1();
    |         ^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0596]: cannot borrow `tick2` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.rs:30:5
@@ -16,6 +20,6 @@ LL |     let tick2 = || { //~ ERROR closure cannot assign to immutable local var
 LL |     tick2(); //~ ERROR cannot borrow
    |     ^^^^^ cannot borrow as mutable
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0596`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr
index f765f207303d..9858b8db2112 100644
--- a/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr
@@ -1,4 +1,4 @@
-error[E0594]: cannot assign to `n`, as it is not declared as mutable
+warning[E0594]: cannot assign to `n`, as it is not declared as mutable
   --> $DIR/unboxed-closures-mutate-upvar.rs:25:9
    |
 LL |     let n = 0;
@@ -6,6 +6,10 @@ LL |     let n = 0;
 LL |     let mut f = to_fn_mut(|| { //~ ERROR closure cannot assign
 LL |         n += 1;
    |         ^^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0594]: cannot assign to `n`, as it is not declared as mutable
   --> $DIR/unboxed-closures-mutate-upvar.rs:42:9
@@ -40,6 +44,6 @@ LL | |         n += 1; //~ ERROR cannot assign
 LL | |     });
    | |_____^
 
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0594`.
diff --git a/src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr b/src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr
deleted file mode 100644
index 7adb195b7d02..000000000000
--- a/src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/dyn-trait-underscore.rs:18:5
-   |
-LL | fn a<T>(items: &[T]) -> Box<dyn Iterator<Item=&T>> {
-   |                - let's call the lifetime of this reference `'1`
-LL |     //                      ^^^^^^^^^^^^^^^^^^^^^ bound *here* defaults to `'static`
-LL |     Box::new(items.iter()) //~ ERROR cannot infer an appropriate lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr b/src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr
deleted file mode 100644
index eedbfbf5f61a..000000000000
--- a/src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/underscore-lifetime-elison-mismatch.rs:11:42
-   |
-LL | fn foo(x: &mut Vec<&'_ u8>, y: &'_ u8) { x.push(y); } //~ ERROR lifetime mismatch
-   |                    -           -         ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-   |                    |           |
-   |                    |           let's call the lifetime of this reference `'1`
-   |                    let's call the lifetime of this reference `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/unop-move-semantics.nll.stderr b/src/test/ui/unop-move-semantics.nll.stderr
index 111940aab2c3..8112ddbe2f16 100644
--- a/src/test/ui/unop-move-semantics.nll.stderr
+++ b/src/test/ui/unop-move-semantics.nll.stderr
@@ -21,7 +21,19 @@ error[E0507]: cannot move out of borrowed content
 LL |     !*n;  //~ ERROR: cannot move out of borrowed content
    |      ^^ cannot move out of borrowed content
 
-error: aborting due to 3 previous errors
+error[E0507]: cannot move out of `*n` which is behind a `&` reference
+  --> $DIR/unop-move-semantics.rs:36:6
+   |
+LL |     let n = &y;
+   |             -- help: consider changing this to be a mutable reference: `&mut y`
+...
+LL |     !*n;  //~ ERROR: cannot move out of borrowed content
+   |      ^^
+   |      |
+   |      cannot move out of `*n` which is behind a `&` reference
+   |      `n` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 4 previous errors
 
 Some errors occurred: E0382, E0507.
 For more information about an error, try `rustc --explain E0382`.
diff --git a/src/test/ui/variance/variance-btree-invariant-types.nll.stderr b/src/test/ui/variance/variance-btree-invariant-types.nll.stderr
deleted file mode 100644
index f09dcdf25dac..000000000000
--- a/src/test/ui/variance/variance-btree-invariant-types.nll.stderr
+++ /dev/null
@@ -1,106 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:16:5
-   |
-LL | fn iter_cov_key<'a, 'new>(v: IterMut<'a, &'static (), ()>) -> IterMut<'a, &'new (), ()> {
-   |                     ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:19:5
-   |
-LL | fn iter_cov_val<'a, 'new>(v: IterMut<'a, (), &'static ()>) -> IterMut<'a, (), &'new ()> {
-   |                     ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:22:5
-   |
-LL | fn iter_contra_key<'a, 'new>(v: IterMut<'a, &'new (), ()>) -> IterMut<'a, &'static (), ()> {
-   |                        ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:25:5
-   |
-LL | fn iter_contra_val<'a, 'new>(v: IterMut<'a, (), &'new ()>) -> IterMut<'a, (), &'static ()> {
-   |                        ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:30:5
-   |
-LL | fn occ_cov_key<'a, 'new>(v: OccupiedEntry<'a, &'static (), ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> OccupiedEntry<'a, &'new (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:34:5
-   |
-LL | fn occ_cov_val<'a, 'new>(v: OccupiedEntry<'a, (), &'static ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> OccupiedEntry<'a, (), &'new ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:38:5
-   |
-LL | fn occ_contra_key<'a, 'new>(v: OccupiedEntry<'a, &'new (), ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> OccupiedEntry<'a, &'static (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:42:5
-   |
-LL | fn occ_contra_val<'a, 'new>(v: OccupiedEntry<'a, (), &'new ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> OccupiedEntry<'a, (), &'static ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:47:5
-   |
-LL | fn vac_cov_key<'a, 'new>(v: VacantEntry<'a, &'static (), ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> VacantEntry<'a, &'new (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:51:5
-   |
-LL | fn vac_cov_val<'a, 'new>(v: VacantEntry<'a, (), &'static ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> VacantEntry<'a, (), &'new ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:55:5
-   |
-LL | fn vac_contra_key<'a, 'new>(v: VacantEntry<'a, &'new (), ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> VacantEntry<'a, &'static (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:59:5
-   |
-LL | fn vac_contra_val<'a, 'new>(v: VacantEntry<'a, (), &'new ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> VacantEntry<'a, (), &'static ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: aborting due to 12 previous errors
-
diff --git a/src/test/ui/variance/variance-cell-is-invariant.nll.stderr b/src/test/ui/variance/variance-cell-is-invariant.nll.stderr
deleted file mode 100644
index eb01c2bbb05b..000000000000
--- a/src/test/ui/variance/variance-cell-is-invariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-cell-is-invariant.rs:24:12
-   |
-LL | fn use_<'short,'long>(c: Foo<'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Foo<'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/variance/variance-contravariant-arg-object.nll.stderr b/src/test/ui/variance/variance-contravariant-arg-object.nll.stderr
deleted file mode 100644
index a30720dc6ba8..000000000000
--- a/src/test/ui/variance/variance-contravariant-arg-object.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-object.rs:24:5
-   |
-LL | fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-object.rs:32:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr b/src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr
deleted file mode 100644
index 69981699da8f..000000000000
--- a/src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-trait-match.rs:23:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'min i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-trait-match.rs:31:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'max i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-contravariant-self-trait-match.nll.stderr b/src/test/ui/variance/variance-contravariant-self-trait-match.nll.stderr
deleted file mode 100644
index a8566814c645..000000000000
--- a/src/test/ui/variance/variance-contravariant-self-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-self-trait-match.rs:23:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'min G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-self-trait-match.rs:32:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'max G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-covariant-arg-object.nll.stderr b/src/test/ui/variance/variance-covariant-arg-object.nll.stderr
deleted file mode 100644
index 26699a537e81..000000000000
--- a/src/test/ui/variance/variance-covariant-arg-object.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-object.rs:25:5
-   |
-LL | fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-object.rs:32:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-covariant-arg-trait-match.nll.stderr b/src/test/ui/variance/variance-covariant-arg-trait-match.nll.stderr
deleted file mode 100644
index bb3f5f5711cb..000000000000
--- a/src/test/ui/variance/variance-covariant-arg-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-trait-match.rs:24:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'min i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-trait-match.rs:30:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'max i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr b/src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr
deleted file mode 100644
index 3bbf9c0d3f5d..000000000000
--- a/src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-self-trait-match.rs:24:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'min G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-self-trait-match.rs:30:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'max G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-invariant-arg-object.nll.stderr b/src/test/ui/variance/variance-invariant-arg-object.nll.stderr
deleted file mode 100644
index 20ab64859861..000000000000
--- a/src/test/ui/variance/variance-invariant-arg-object.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-object.rs:21:5
-   |
-LL | fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-object.rs:28:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr b/src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr
deleted file mode 100644
index be9f5a632dd6..000000000000
--- a/src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-trait-match.rs:20:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'min i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-trait-match.rs:26:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'max i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr b/src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr
deleted file mode 100644
index f5827856a1bd..000000000000
--- a/src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-self-trait-match.rs:20:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'min G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-self-trait-match.rs:26:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'max G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-trait-matching.nll.stderr b/src/test/ui/variance/variance-trait-matching.nll.stderr
deleted file mode 100644
index 14b42585d6e2..000000000000
--- a/src/test/ui/variance/variance-trait-matching.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `get`
-  --> $DIR/variance-trait-matching.rs:34:5
-   |
-LL | fn get<'a, G>(get: &G) -> i32
-   |                    -- help: add explicit lifetime `'a` to the type of `get`: `&'a G`
-...
-LL |     pick(get, &22) //~ ERROR 34:5: 34:9: explicit lifetime required in the type of `get` [E0621]
-   |     ^^^^^^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr b/src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr
deleted file mode 100644
index 37604af50632..000000000000
--- a/src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-contravariant-struct-1.rs:22:5
-   |
-LL | fn foo<'min,'max>(v: SomeStruct<&'max ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr b/src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr
deleted file mode 100644
index c7fd60301c83..000000000000
--- a/src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-covariant-struct-1.rs:20:5
-   |
-LL | fn foo<'min,'max>(v: SomeStruct<&'min ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr b/src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr
deleted file mode 100644
index 1638d5ec4fb7..000000000000
--- a/src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-invariant-struct-1.rs:22:5
-   |
-LL | fn foo<'min,'max>(v: SomeStruct<&'max ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-invariant-struct-1.rs:29:5
-   |
-LL | fn bar<'min,'max>(v: SomeStruct<&'min ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/wf/wf-static-method.nll.stderr b/src/test/ui/wf/wf-static-method.nll.stderr
deleted file mode 100644
index bfcb16c654ff..000000000000
--- a/src/test/ui/wf/wf-static-method.nll.stderr
+++ /dev/null
@@ -1,55 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:27:9
-   |
-LL | impl<'a, 'b> Foo<'a, 'b, Evil<'a, 'b>> for () {
-   |      --  -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-...
-LL |         u //~ ERROR E0312
-   |         ^ returning this value requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:36:18
-   |
-LL | impl<'a, 'b> Foo<'a, 'b, ()> for IndirectEvil<'a, 'b> {
-   |      --  -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-...
-LL |         let me = Self::make_me(); //~ ERROR lifetime bound not satisfied
-   |                  ^^^^^^^^^^^^^^^ requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:43:9
-   |
-LL | impl<'a, 'b> Evil<'a, 'b> {
-   |      --  -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-LL |     fn inherent_evil(u: &'b u32) -> &'a u32 {
-LL |         u //~ ERROR E0312
-   |         ^ returning this value requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:51:5
-   |
-LL | fn evil<'a, 'b>(b: &'b u32) -> &'a u32 {
-   |         --  -- lifetime `'b` defined here
-   |         |
-   |         lifetime `'a` defined here
-LL |     <()>::static_evil(b) //~ ERROR cannot infer an appropriate lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:55:5
-   |
-LL | fn indirect_evil<'a, 'b>(b: &'b u32) -> &'a u32 {
-   |                  --  -- lifetime `'b` defined here
-   |                  |
-   |                  lifetime `'a` defined here
-LL |     <IndirectEvil>::static_evil(b)
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'b` must outlive `'a`
-
-error: aborting due to 5 previous errors
-