http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59075
--- Comment #2 from Tom Tromey <tromey at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #1) > Tom, do you know why this would be true on OS X? Offhand I do not know. I think there are a few things that could help us find out, though. One would be to see the gdb session. This would tell us which libstdc++ is being loaded. Another would be to attach the executable to the bug, assuming it is small enough (if too large -- write a minimal reproducer and attach it). Then I could look at the DWARF. I'm also curious exactly what options were used to build the executable. This can matter sometimes.