Add test case for #22434

Closes #22434

Author: Stebalien

src/test/compile-fail/issue-22434.rs

@@ -0,0 +1,18 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub trait Foo {
+    type A;
+}
+
+type I<'a> = &'a (Foo + 'a);
+//~^ ERROR the value of the associated type `A` (from the trait `Foo`) must be specified
+
+fn main() {}