1 files changed, 17 insertions, 0 deletions
diff --git a/tests/crashes/118987.rs b/tests/crashes/118987.rs
new file mode 100644
index 00000000000..4382a7bcb63
--- /dev/null
+++ b/tests/crashes/118987.rs
@@ -0,0 +1,17 @@
+//@ known-bug: #118987
+#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+
+trait Assoc {
+    type Output;
+}
+
+default impl<T: Clone> Assoc for T {
+    type Output = bool;
+}
+
+impl Assoc for u8 {}
+
+trait Foo {}
+
+impl Foo for <u8 as Assoc>::Output {}
+impl Foo for <u16 as Assoc>::Output {}