1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/wf/wf-trait-bound.rs b/src/test/ui/wf/wf-trait-bound.rs
new file mode 100644
index 000000000..62a1eb5b0
--- /dev/null
+++ b/src/test/ui/wf/wf-trait-bound.rs
@@ -0,0 +1,15 @@
+// Test that we check supertrait bounds for WFedness.
+
+#![feature(associated_type_defaults)]
+
+#![allow(dead_code)]
+
+trait ExtraCopy<T:Copy> { }
+
+trait SomeTrait<T,U>
+    where T: ExtraCopy<U> //~ ERROR E0277
+{
+}
+
+
+fn main() { }