1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/wf/wf-trait-superbound.stderr b/src/test/ui/wf/wf-trait-superbound.stderr
new file mode 100644
index 000000000..cd49243a4
--- /dev/null
+++ b/src/test/ui/wf/wf-trait-superbound.stderr
@@ -0,0 +1,19 @@
+error[E0277]: the trait bound `T: Copy` is not satisfied
+  --> $DIR/wf-trait-superbound.rs:9:21
+   |
+LL | trait SomeTrait<T>: ExtraCopy<T> {
+   |                     ^^^^^^^^^^^^ the trait `Copy` is not implemented for `T`
+   |
+note: required by a bound in `ExtraCopy`
+  --> $DIR/wf-trait-superbound.rs:7:19
+   |
+LL | trait ExtraCopy<T:Copy> { }
+   |                   ^^^^ required by this bound in `ExtraCopy`
+help: consider restricting type parameter `T`
+   |
+LL | trait SomeTrait<T: std::marker::Copy>: ExtraCopy<T> {
+   |                  +++++++++++++++++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.