From a6cc4dd308213390a53a53101424ca4ef2e351ab Mon Sep 17 00:00:00 2001
From: Nick Hamann <nick@wabbo.org>
Date: Sat, 20 Jun 2015 01:31:31 -0500
Subject: [PATCH] Add a regression test for #18058.

Fixes #18058.
---
 src/test/compile-fail/issue-18058.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/test/compile-fail/issue-18058.rs

diff --git a/src/test/compile-fail/issue-18058.rs b/src/test/compile-fail/issue-18058.rs
new file mode 100644
index 000000000000..bbb540200b43
--- /dev/null
+++ b/src/test/compile-fail/issue-18058.rs
@@ -0,0 +1,14 @@
+// Copyright 2015 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.
+
+impl Undefined {}
+//~^ ERROR use of undeclared type name `Undefined`
+
+fn main() {}