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-rw-r--r--src/test/compile-fail/issue-30580.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/test/compile-fail/issue-30580.rs b/src/test/compile-fail/issue-30580.rs
index 908a2d47401..88d4aef6d9d 100644
--- a/src/test/compile-fail/issue-30580.rs
+++ b/src/test/compile-fail/issue-30580.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// Test that we do not see uninformative region-related errors
+// when we get some basic type-checking failure. See #30580.
+
 pub struct Foo { a: u32 }
 pub struct Pass<'a, 'tcx: 'a>(&'a mut &'a (), &'a &'tcx ());