Store Option<Region> as value for RegionVid

src/test/ui/associated-types/associated-types-eq-hr.rs

@@ -102,6 +102,8 @@ pub fn call_tuple_two() {
     tuple_two::<Tuple>();
     //~^ ERROR implementation of `TheTrait` is not general enough
     //~| ERROR implementation of `TheTrait` is not general enough
+    //~| ERROR mismatched types
+    //~| ERROR mismatched types
 }
 
 pub fn call_tuple_three() {

src/test/ui/associated-types/associated-types-eq-hr.stderr

@@ -46,6 +46,34 @@ LL |     tuple_one::<Tuple>();
    = note: `Tuple` must implement `TheTrait<(&'0 isize, &'1 isize)>`, for any two lifetimes `'0` and `'1`...
    = note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
 
+error[E0308]: mismatched types
+  --> $DIR/associated-types-eq-hr.rs:102:5
+   |
+LL |     tuple_two::<Tuple>();
+   |     ^^^^^^^^^^^^^^^^^^ lifetime mismatch
+   |
+   = note: expected reference `&'x isize`
+              found reference `&'y isize`
+note: the lifetime requirement is introduced here
+  --> $DIR/associated-types-eq-hr.rs:66:53
+   |
+LL |     T: for<'x, 'y> TheTrait<(&'x isize, &'y isize), A = &'y isize>,
+   |                                                     ^^^^^^^^^^^^^
+
+error[E0308]: mismatched types
+  --> $DIR/associated-types-eq-hr.rs:102:5
+   |
+LL |     tuple_two::<Tuple>();
+   |     ^^^^^^^^^^^^^^^^^^ lifetime mismatch
+   |
+   = note: expected reference `&'x isize`
+              found reference `&'y isize`
+note: the lifetime requirement is introduced here
+  --> $DIR/associated-types-eq-hr.rs:66:53
+   |
+LL |     T: for<'x, 'y> TheTrait<(&'x isize, &'y isize), A = &'y isize>,
+   |                                                     ^^^^^^^^^^^^^
+
 error: implementation of `TheTrait` is not general enough
   --> $DIR/associated-types-eq-hr.rs:102:5
    |
@@ -65,7 +93,7 @@ LL |     tuple_two::<Tuple>();
    = note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
 
 error: implementation of `TheTrait` is not general enough
-  --> $DIR/associated-types-eq-hr.rs:112:5
+  --> $DIR/associated-types-eq-hr.rs:114:5
    |
 LL |     tuple_four::<Tuple>();
    |     ^^^^^^^^^^^^^^^^^^^ implementation of `TheTrait` is not general enough
@@ -73,6 +101,7 @@ LL |     tuple_four::<Tuple>();
    = note: `Tuple` must implement `TheTrait<(&'0 isize, &'1 isize)>`, for any two lifetimes `'0` and `'1`...
    = note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
 
-error: aborting due to 7 previous errors
+error: aborting due to 9 previous errors
 
-For more information about this error, try `rustc --explain E0271`.
+Some errors have detailed explanations: E0271, E0308.
+For more information about an error, try `rustc --explain E0271`.

src/test/ui/hrtb/issue-62203-hrtb-ice.stderr

@@ -9,7 +9,7 @@ LL |     let v = Unit2.m(
    = help: consider constraining the associated type `<_ as Ty<'_>>::V` to `Unit4`
    = note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
 
-error[E0271]: type mismatch resolving `<[closure@$DIR/issue-62203-hrtb-ice.rs:42:17: 42:39] as FnOnce<((&u8,),)>>::Output == Unit3`
+error[E0271]: type mismatch resolving `<[closure@$DIR/issue-62203-hrtb-ice.rs:42:17: 42:39] as FnOnce<((&'r u8,),)>>::Output == Unit3`
   --> $DIR/issue-62203-hrtb-ice.rs:38:19
    |
 LL |     let v = Unit2.m(

src/test/ui/rfc1623.rs

@@ -23,6 +23,10 @@ static SOME_STRUCT: &SomeStruct = &SomeStruct {
     bar: &Bar { bools: &[true, true] },
     f: &id,
     //~^ ERROR implementation of `FnOnce` is not general enough
+    //~^^ mismatched types
+    //~^^^ mismatched types
+    //~^^^^ mismatched types
+    //~^^^^^ mismatched types
 };
 
 // very simple test for a 'static static with default lifetime

src/test/ui/rfc1623.stderr

@@ -1,3 +1,39 @@
+error[E0308]: mismatched types
+  --> $DIR/rfc1623.rs:24:8
+   |
+LL |     f: &id,
+   |        ^^^ one type is more general than the other
+   |
+   = note: expected reference `&'a Foo<'b>`
+              found reference `&'a Foo<'b>`
+
+error[E0308]: mismatched types
+  --> $DIR/rfc1623.rs:24:8
+   |
+LL |     f: &id,
+   |        ^^^ one type is more general than the other
+   |
+   = note: expected reference `&'a Foo<'b>`
+              found reference `&'a Foo<'b>`
+
+error[E0308]: mismatched types
+  --> $DIR/rfc1623.rs:24:8
+   |
+LL |     f: &id,
+   |        ^^^ one type is more general than the other
+   |
+   = note: expected reference `&'a Foo<'b>`
+              found reference `&'a Foo<'b>`
+
+error[E0308]: mismatched types
+  --> $DIR/rfc1623.rs:24:8
+   |
+LL |     f: &id,
+   |        ^^^ one type is more general than the other
+   |
+   = note: expected reference `&'a Foo<'b>`
+              found reference `&'a Foo<'b>`
+
 error: implementation of `FnOnce` is not general enough
   --> $DIR/rfc1623.rs:24:8
    |
@@ -7,5 +43,6 @@ LL |     f: &id,
    = note: `fn(&'2 Foo<'_>) -> &'2 Foo<'_> {id::<&'2 Foo<'_>>}` must implement `FnOnce<(&'1 Foo<'b>,)>`, for any lifetime `'1`...
    = note: ...but it actually implements `FnOnce<(&'2 Foo<'_>,)>`, for some specific lifetime `'2`
 
-error: aborting due to previous error
+error: aborting due to 5 previous errors
 
+For more information about this error, try `rustc --explain E0308`.

src/test/ui/traits/inductive-overflow/lifetime.rs

@@ -26,6 +26,4 @@ fn main() {
     // Should only be a few notes.
     is_send::<X<C<'static>>>();
     //~^ ERROR overflow evaluating
-    //~^^ 2 redundant
-    //~^^^ required because of
 }

src/test/ui/traits/inductive-overflow/lifetime.stderr

@@ -1,4 +1,4 @@
-error[E0275]: overflow evaluating the requirement `Box<X<C<'_>>>: NotAuto`
+error[E0275]: overflow evaluating the requirement `Box<X<C<'static>>>: NotAuto`
   --> $DIR/lifetime.rs:27:5
    |
 LL | fn is_send<S: NotAuto>() {}
@@ -7,13 +7,11 @@ LL | fn is_send<S: NotAuto>() {}
 LL |     is_send::<X<C<'static>>>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
    |
-note: required because of the requirements on the impl of `NotAuto` for `X<C<'_>>`
+note: required because of the requirements on the impl of `NotAuto` for `X<C<'static>>`
   --> $DIR/lifetime.rs:19:12
    |
 LL | impl<T: Y> NotAuto for X<T> where T::P: NotAuto {}
    |            ^^^^^^^     ^^^^
-   = note: 2 redundant requirements hidden
-   = note: required because of the requirements on the impl of `NotAuto` for `X<C<'static>>`
 
 error: aborting due to previous error
 

src/test/ui/type-alias-impl-trait/issue-60371.rs

@@ -9,7 +9,7 @@ trait Bug {
 impl Bug for &() {
     type Item = impl Bug; //~ ERROR `impl Trait` in type aliases is unstable
     //~^ ERROR the trait bound `(): Bug` is not satisfied
-    //~^^ ERROR could not find defining uses
+    //~^^ ERROR the trait bound
 
     const FUN: fn() -> Self::Item = || ();
     //~^ ERROR type alias impl trait is not permitted here

src/test/ui/type-alias-impl-trait/issue-60371.stderr

@@ -25,11 +25,14 @@ LL |     type Item = impl Bug;
    = help: the following implementations were found:
              <&() as Bug>
 
-error: could not find defining uses
+error[E0277]: the trait bound `(): Bug` is not satisfied
   --> $DIR/issue-60371.rs:10:17
    |
 LL |     type Item = impl Bug;
-   |                 ^^^^^^^^
+   |                 ^^^^^^^^ the trait `Bug` is not implemented for `()`
+   |
+   = help: the following implementations were found:
+             <&() as Bug>
 
 error: aborting due to 4 previous errors