1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/issue-87429-specialization.rs b/src/test/ui/generic-associated-types/issue-87429-specialization.rs
new file mode 100644
index 000000000..b365e07fe
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-87429-specialization.rs
@@ -0,0 +1,25 @@
+// check-fail
+
+#![feature(specialization)]
+//~^ WARN incomplete
+#![feature(generic_associated_types)]
+
+trait Family {
+    type Member<'a>: for<'b> PartialEq<Self::Member<'b>>;
+}
+
+struct I32Family;
+
+impl Family for I32Family {
+    default type Member<'a> = i32;
+}
+
+struct Foo;
+struct FooFamily;
+
+impl Family for FooFamily {
+    default type Member<'a> = Foo;
+    //~^ ERROR can't compare
+}
+
+fn main() {}