https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69191
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to eyenseo from comment #7) > (In reply to Jonathan Wakely from comment #6) > > Thanks for letting me know of the "importance-ignoring" one two less clicks > next time ;) Yes, you don't need to bother with that :-) > I didn't include the segfault in the precompiled file as I would not be able > to get the full output that describes the bug better than the segfault. Ah yes, so that will be why I didn't see a segfault when mixing GCC 4.9 and GCC 5. > So in the end we have to assume that the travis setup and my system get the > error because the Ubuntu guys build gcc wrong - but not recognisable in the > build settings I included in comment #1 ? That only shows how your gcc compiler was built. If I understand correctly the Ubuntu packages that provide libstdc++.so.6 come from a different build (of a different version) from the gcc compiler executables.