1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence_copy_like_err_tuple.rs b/src/test/ui/coherence/coherence_copy_like_err_tuple.rs
new file mode 100644
index 000000000..f63e205c9
--- /dev/null
+++ b/src/test/ui/coherence/coherence_copy_like_err_tuple.rs
@@ -0,0 +1,21 @@
+// Test that we are able to introduce a negative constraint that
+// `MyType: !MyTrait` along with other "fundamental" wrappers.
+
+// aux-build:coherence_copy_like_lib.rs
+
+extern crate coherence_copy_like_lib as lib;
+
+struct MyType { x: i32 }
+
+trait MyTrait { fn foo() {} }
+impl<T: lib::MyCopy> MyTrait for T { }
+
+// Tuples are not fundamental, therefore this would require that
+//
+//     (MyType,): !MyTrait
+//
+// which we cannot approve.
+impl MyTrait for (MyType,) { }
+//~^ ERROR E0119
+
+fn main() { }