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// UNSUPPORTED: libcpp-has-no-threads 11// REQUIRES: thread-safety 12 13// <mutex> 14 15// MODULES_DEFINES: _LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS 16#define _LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS 17 18#include <mutex> 19 20std::mutex m; 21 22int main() { 23 m.lock(); 24} // expected-error {{mutex 'm' is still held at the end of function}} 25