[Boost-users] Signal with return value will crash

Hi, I tried the signals, the code below will crash #include int _tmain(int argc, _TCHAR* argv[]) { boost::signal _sig; _sig(10); return 0; } but code below works well #include int _tmain(int argc, _TCHAR* argv[]) { boost::signal _sig; _sig(10); return 0; } The only difference is one has return value, the other doesn't, is this a bug or by design? Thanks, Wang Yun