[Bug libstdc++/50348] -fvisibility=hidden doesn't hide stl implementation details.

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50348

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-22 13:45:10 UTC ---
I think before the default visibility was added everywhere it was pretty easy
to cause segfaults by using -fvisibility=hidden