1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/specialization/specialization-projection-alias.rs b/src/test/ui/specialization/specialization-projection-alias.rs
new file mode 100644
index 000000000..f1f0b47bb
--- /dev/null
+++ b/src/test/ui/specialization/specialization-projection-alias.rs
@@ -0,0 +1,26 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+
+// Regression test for ICE when combining specialized associated types and type
+// aliases
+
+trait Id_ {
+    type Out;
+}
+
+type Id<T> = <T as Id_>::Out;
+
+impl<T> Id_ for T {
+    default type Out = T;
+}
+
+fn test_proection() {
+    let x: Id<bool> = panic!();
+}
+
+fn main() {
+
+}