1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/wf/wf-trait-fn-arg.stderr b/src/test/ui/wf/wf-trait-fn-arg.stderr
new file mode 100644
index 000000000..3bd1f4892
--- /dev/null
+++ b/src/test/ui/wf/wf-trait-fn-arg.stderr
@@ -0,0 +1,19 @@
+error[E0277]: the trait bound `Self: Eq` is not satisfied
+  --> $DIR/wf-trait-fn-arg.rs:10:23
+   |
+LL |     fn bar(&self, x: &Bar<Self>);
+   |                       ^^^^^^^^^ the trait `Eq` is not implemented for `Self`
+   |
+note: required by a bound in `Bar`
+  --> $DIR/wf-trait-fn-arg.rs:7:14
+   |
+LL | struct Bar<T:Eq+?Sized> { value: Box<T> }
+   |              ^^ required by this bound in `Bar`
+help: consider further restricting `Self`
+   |
+LL |     fn bar(&self, x: &Bar<Self>) where Self: Eq;
+   |                                  ++++++++++++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.