1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/never_type/impl_trait_fallback3.rs b/src/test/ui/never_type/impl_trait_fallback3.rs
new file mode 100644
index 000000000..ed645b823
--- /dev/null
+++ b/src/test/ui/never_type/impl_trait_fallback3.rs
@@ -0,0 +1,15 @@
+#![feature(type_alias_impl_trait)]
+
+fn main() {}
+
+trait T {
+    type Assoc;
+}
+
+type Foo = impl T;
+
+fn a() -> Foo {
+    //~^ ERROR the trait bound `(): T` is not satisfied
+    // This is not a defining use, it doesn't actually constrain the opaque type.
+    panic!()
+}