Add test for #24227

Author: Munksgaard

src/test/run-pass/issue-24227.rs

@@ -0,0 +1,27 @@
+// 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.
+
+// This resulted in an ICE. Test for future-proofing
+// Issue #24227
+
+#![allow(unused)]
+
+struct Foo<'a> {
+    x: &'a u8
+}
+
+impl<'a> Foo<'a> {
+    fn foo() {
+        let mut tmp: Self;
+    }
+
+}
+
+fn main() {}