1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence-overlap-trait-alias.rs b/src/test/ui/coherence/coherence-overlap-trait-alias.rs
new file mode 100644
index 000000000..9d9c76af9
--- /dev/null
+++ b/src/test/ui/coherence/coherence-overlap-trait-alias.rs
@@ -0,0 +1,20 @@
+#![feature(rustc_attrs)]
+#![feature(trait_alias)]
+#![feature(with_negative_coherence)]
+
+trait A {}
+trait B {}
+trait AB = A + B;
+
+impl A for u32 {}
+impl B for u32 {}
+
+#[rustc_strict_coherence]
+trait C {}
+impl<T: AB> C for T {}
+impl C for u32 {}
+//~^ ERROR
+// FIXME it's giving an ungreat error but unsure if we care given that it's using an internal rustc
+// attribute and an artificial code path for testing purposes
+
+fn main() {}