1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/wf/wf-trait-fn-arg.rs b/tests/ui/wf/wf-trait-fn-arg.rs
new file mode 100644
index 000000000..044569942
--- /dev/null
+++ b/tests/ui/wf/wf-trait-fn-arg.rs
@@ -0,0 +1,16 @@
+// Check that we test WF conditions for fn arguments in a trait definition.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+struct Bar<T:Eq+?Sized> { value: Box<T> }
+
+trait Foo {
+    fn bar(&self, x: &Bar<Self>);
+        //~^ ERROR E0277
+        //
+        // Here, Eq ought to be implemented.
+}
+
+fn main() { }