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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <mutex>
// struct once_flag;
// once_flag& operator=(const once_flag&) = delete;
#include <mutex>
int main()
{
std::once_flag f;
std::once_flag f2;
f2 = f;
}
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