1 files changed, 29 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-37534.stderr b/tests/ui/issues/issue-37534.stderr
new file mode 100644
index 000000000..895479986
--- /dev/null
+++ b/tests/ui/issues/issue-37534.stderr
@@ -0,0 +1,29 @@
+error[E0404]: expected trait, found derive macro `Hash`
+  --> $DIR/issue-37534.rs:1:16
+   |
+LL | struct Foo<T: ?Hash> { }
+   |                ^^^^ not a trait
+   |
+help: consider importing this trait instead
+   |
+LL | use std::hash::Hash;
+   |
+
+warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported
+  --> $DIR/issue-37534.rs:1:12
+   |
+LL | struct Foo<T: ?Hash> { }
+   |            ^
+
+error[E0392]: parameter `T` is never used
+  --> $DIR/issue-37534.rs:1:12
+   |
+LL | struct Foo<T: ?Hash> { }
+   |            ^ unused parameter
+   |
+   = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+
+error: aborting due to 2 previous errors; 1 warning emitted
+
+Some errors have detailed explanations: E0392, E0404.
+For more information about an error, try `rustc --explain E0392`.