[Bug c++/57178] bogus warning with -O3 using boost::optional

[eda-qa at disemia dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57178

--- Comment #1 from eda-qa at disemia dot com 2013-05-05 14:56:35 UTC ---
Created attachment 30034
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30034
example