1 files changed, 19 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-19479.rs b/tests/ui/issues/issue-19479.rs
new file mode 100644
index 000000000..70bfe7213
--- /dev/null
+++ b/tests/ui/issues/issue-19479.rs
@@ -0,0 +1,19 @@
+// check-pass
+// pretty-expanded FIXME #23616
+
+trait Base {
+    fn dummy(&self) { }
+}
+trait AssocA {
+    type X: Base;
+    fn dummy(&self) { }
+}
+trait AssocB {
+    type Y: Base;
+    fn dummy(&self) { }
+}
+impl<T: AssocA> AssocB for T {
+    type Y = <T as AssocA>::X;
+}
+
+fn main() {}