From ee737c73a2ac2d02420df812ad36cf16856da67a Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Fri, 2 Feb 2018 12:11:16 +0530
Subject: [PATCH] Add regression test

---
 src/test/rustdoc/issue-47639.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 src/test/rustdoc/issue-47639.rs

diff --git a/src/test/rustdoc/issue-47639.rs b/src/test/rustdoc/issue-47639.rs
new file mode 100644
index 00000000000..167c3aaec4a
--- /dev/null
+++ b/src/test/rustdoc/issue-47639.rs
@@ -0,0 +1,16 @@
+// Copyright 2018 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 should not ICE
+pub fn test() {
+    macro_rules! foo {
+        () => ()
+    }
+}