From b39ba21fcbf262b94bc8b7c20310fc7fb923d53c Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Wed, 15 Jun 2022 11:02:46 -0400
Subject: [PATCH] tests H.R. `T: 'a` bounds proving themselves

---
 src/test/ui/regions/forall-wf-ref-reflexive.rs | 18 ++++++++++++++++++
 .../ui/regions/forall-wf-ref-reflexive.stderr  |  8 ++++++++
 src/test/ui/regions/forall-wf-reflexive.rs     | 15 +++++++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 src/test/ui/regions/forall-wf-ref-reflexive.rs
 create mode 100644 src/test/ui/regions/forall-wf-ref-reflexive.stderr
 create mode 100644 src/test/ui/regions/forall-wf-reflexive.rs

diff --git a/src/test/ui/regions/forall-wf-ref-reflexive.rs b/src/test/ui/regions/forall-wf-ref-reflexive.rs
new file mode 100644
index 000000000000..9c37d72d56b6
--- /dev/null
+++ b/src/test/ui/regions/forall-wf-ref-reflexive.rs
@@ -0,0 +1,18 @@
+// Test that we consider `for<'a> &'a T: 'a` to be sufficient to prove
+// that `for<'a> &'a T: 'a`.
+//
+// FIXME. Except we don't!
+
+#![allow(warnings)]
+
+fn self_wf2<T>()
+where
+    for<'a> &'a T: 'a,
+{
+    self_wf2::<T>();
+    //~^ ERROR `T` does not live long enough
+    //
+    // FIXME. This ought to be accepted, presumably.
+}
+
+fn main() {}
diff --git a/src/test/ui/regions/forall-wf-ref-reflexive.stderr b/src/test/ui/regions/forall-wf-ref-reflexive.stderr
new file mode 100644
index 000000000000..3d059ccec729
--- /dev/null
+++ b/src/test/ui/regions/forall-wf-ref-reflexive.stderr
@@ -0,0 +1,8 @@
+error: `T` does not live long enough
+  --> $DIR/forall-wf-ref-reflexive.rs:12:5
+   |
+LL |     self_wf2::<T>();
+   |     ^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+
diff --git a/src/test/ui/regions/forall-wf-reflexive.rs b/src/test/ui/regions/forall-wf-reflexive.rs
new file mode 100644
index 000000000000..8e6b8224b318
--- /dev/null
+++ b/src/test/ui/regions/forall-wf-reflexive.rs
@@ -0,0 +1,15 @@
+// Test that we consider `for<'a> T: 'a` to be sufficient to prove
+// that `for<'a> T: 'a`.
+//
+// check-pass
+
+#![allow(warnings)]
+
+fn self_wf1<T>()
+where
+    for<'a> T: 'a,
+{
+    self_wf1::<T>();
+}
+
+fn main() {}