1 files changed, 18 insertions, 0 deletions
diff --git a/libcxx/test/std/extensions/hash_map/const_iterator.fail.cpp b/libcxx/test/std/extensions/hash_map/const_iterator.fail.cpp
new file mode 100644
index 00000000000..e4c536e8f33
--- /dev/null
+++ b/libcxx/test/std/extensions/hash_map/const_iterator.fail.cpp
@@ -0,0 +1,18 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <ext/hash_map>
+
+int main()
+{
+    __gnu_cxx::hash_map<int, int> m;
+    m[1] = 1;
+    const __gnu_cxx::hash_map<int, int> &cm = m;
+    cm.find(1)->second = 2;  // error
+}