1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence_local_err_tuple.rs b/src/test/ui/coherence/coherence_local_err_tuple.rs
new file mode 100644
index 000000000..f4033862a
--- /dev/null
+++ b/src/test/ui/coherence/coherence_local_err_tuple.rs
@@ -0,0 +1,18 @@
+// 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
+#![allow(dead_code)]
+
+extern crate coherence_copy_like_lib as lib;
+
+struct MyType { x: i32 }
+
+// These are all legal because they are all fundamental types:
+
+// Tuples are not fundamental, so this is not a local impl.
+impl lib::MyCopy for (MyType,) { }
+//~^ ERROR E0117
+
+
+fn main() { }