[Bug c++/50871] [C++0x] G++ fails to reject explicitly-defaulted function definition with different exception spec in system headers

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50871

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-10-26 
13:46:45 UTC ---
Yes they are. Not doing that would be a good idea