Add test for issue-67424

Author: JohnTitor

src/test/ui/generic-associated-types/issue-67424.rs

@@ -0,0 +1,13 @@
+// Fixed by #67160
+
+trait Trait1 {
+    type A;
+}
+
+trait Trait2 {
+    type Type1<B>: Trait1<A=B>;
+    //~^ ERROR: generic associated types are unstable
+    //~| ERROR: type-generic associated types are not yet implemented
+}
+
+fn main() {}

src/test/ui/generic-associated-types/issue-67424.stderr

@@ -0,0 +1,20 @@
+error[E0658]: generic associated types are unstable
+  --> $DIR/issue-67424.rs:8:5
+   |
+LL |     type Type1<B>: Trait1<A=B>;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: for more information, see https://github.com/rust-lang/rust/issues/44265
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
+
+error: type-generic associated types are not yet implemented
+  --> $DIR/issue-67424.rs:8:5
+   |
+LL |     type Type1<B>: Trait1<A=B>;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: for more information, see https://github.com/rust-lang/rust/issues/44265
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0658`.