1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/coherence/coherence-overlap-upstream.rs b/tests/ui/coherence/coherence-overlap-upstream.rs
new file mode 100644
index 00000000000..8f1e6558b15
--- /dev/null
+++ b/tests/ui/coherence/coherence-overlap-upstream.rs
@@ -0,0 +1,16 @@
+// Tests that we consider `i16: Remote` to be ambiguous, even
+// though the upstream crate doesn't implement it for now.
+
+// aux-build:coherence_lib.rs
+
+
+extern crate coherence_lib;
+
+use coherence_lib::Remote;
+
+trait Foo {}
+impl<T> Foo for T where T: Remote {}
+impl Foo for i16 {}
+//~^ ERROR E0119
+
+fn main() {}