On 5 March 2015 at 23:06, Maik Zumstrull wrote: > Does, in fact, compile on gcc 4.9.2 (Fedora). However, based on > http://en.cppreference.com/w/cpp/atomic/atomic I would expect this to > error out, since std::shared_ptr is surely not TriviallyCopyable. Can Violating the precondition is undefined behaviour, so there's no guarantee it will fail to compile. > somebody in the know (jwakely?) comment whether this is supposed to > compile, and would work as implied? Anyway, with current trunk it fails: /home/jwakely/gcc/5/include/c++/5.0.0/atomic:170:7: error: static assertion failed: std::atomic requires a trivially copyable type That wasn't possible previously because we didn't support the is_trivially_copyable trait.
