1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/wf/wf-trait-default-fn-ret.rs b/tests/ui/wf/wf-trait-default-fn-ret.rs
new file mode 100644
index 00000000000..2103dae8d23
--- /dev/null
+++ b/tests/ui/wf/wf-trait-default-fn-ret.rs
@@ -0,0 +1,19 @@
+// Check that we test WF conditions for fn arguments. Because the
+// current code is so goofy, this is only a warning for now.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+struct Bar<T:Eq+?Sized> { value: Box<T> }
+
+trait Foo {
+    fn bar(&self) -> Bar<Self> {
+        //~^ ERROR E0277
+        //
+        // Here, Eq ought to be implemented.
+        loop { }
+    }
+}
+
+fn main() { }