From 8715b81f37cf3d6960f3f8c0360ffda6bf268d1d Mon Sep 17 00:00:00 2001
From: Jeffrey Seyfried <jeffrey.seyfried@gmail.com>
Date: Thu, 8 Feb 2018 15:55:35 -0800
Subject: [PATCH] Add test.

---
 src/test/run-pass/hygiene/issue-47311.rs | 26 ++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/test/run-pass/hygiene/issue-47311.rs

diff --git a/src/test/run-pass/hygiene/issue-47311.rs b/src/test/run-pass/hygiene/issue-47311.rs
new file mode 100644
index 000000000000..3b6890cdce63
--- /dev/null
+++ b/src/test/run-pass/hygiene/issue-47311.rs
@@ -0,0 +1,26 @@
+// 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.
+
+// ignore-pretty pretty-printing is unhygienic
+
+#![feature(decl_macro)]
+#![allow(unused)]
+
+macro m($S:ident, $x:ident) {
+    $S { $x: 0 }
+}
+
+mod foo {
+    struct S { x: i32 }
+
+    fn f() { ::m!(S, x); }
+}
+
+fn main() {}