On 5 March 2015 at 23:29, Jonathan Wakely wrote: > 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. This was https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63322
