1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/ui/traits/reservation-impl/coherence-conflict.rs b/src/test/ui/traits/reservation-impl/coherence-conflict.rs
new file mode 100644
index 000000000..fa4a30931
--- /dev/null
+++ b/src/test/ui/traits/reservation-impl/coherence-conflict.rs
@@ -0,0 +1,14 @@
+// check that reservation impls are accounted for in negative reasoning.
+
+#![feature(rustc_attrs)]
+
+trait MyTrait {}
+#[rustc_reservation_impl="this impl is reserved"]
+impl MyTrait for () {}
+
+trait OtherTrait {}
+impl OtherTrait for () {}
+impl<T: MyTrait> OtherTrait for T {}
+//~^ ERROR conflicting implementations
+
+fn main() {}