1 files changed, 29 insertions, 0 deletions
diff --git a/tests/ui/coherence/coherence-cow.rs b/tests/ui/coherence/coherence-cow.rs
new file mode 100644
index 000000000..86a8d0963
--- /dev/null
+++ b/tests/ui/coherence/coherence-cow.rs
@@ -0,0 +1,29 @@
+// revisions: re_a re_b re_c
+
+#![cfg_attr(any(), re_a, re_b, re_c)]
+
+// aux-build:coherence_lib.rs
+
+// Test that the `Pair` type reports an error if it contains type
+// parameters, even when they are covered by local types. This test
+// was originally intended to test the opposite, but the rules changed
+// with RFC 1023 and this became illegal.
+
+extern crate coherence_lib as lib;
+use lib::{Remote,Pair};
+
+pub struct Cover<T>(T);
+
+#[cfg(any(re_a))]
+impl<T> Remote for Pair<T,Cover<T>> { }
+//[re_a]~^ ERROR E0117
+
+#[cfg(any(re_b))]
+impl<T> Remote for Pair<Cover<T>,T> { }
+//[re_b]~^ ERROR E0117
+
+#[cfg(any(re_c))]
+impl<T,U> Remote for Pair<Cover<T>,U> { }
+//[re_c]~^ ERROR E0117
+
+fn main() { }