1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include <assert.h>
11#include <ext/hash_map>
12#include <string>
13
14int main()
15{
16    assert(__gnu_cxx::hash<std::string>()(std::string()) == 0);  // error
17}
18