https://bugs.freedesktop.org/show_bug.cgi?id=78242
--- Comment #1 from Laurent carlier lordheavym@gmail.com --- rm /media/bigdata/games/.steam/steam/ubuntu12_32/steam-runtime/i386/lib/i386-linux-gnu/libgcc_s.so.1
should fix the problem. It's a steam bug, not a mesa one