https://bugs.freedesktop.org/show_bug.cgi?id=75211
--- Comment #2 from Christoph Haag haagch.christoph@googlemail.com --- Created attachment 94380 --> https://bugs.freedesktop.org/attachment.cgi?id=94380&action=edit last few lines before crash with MESA_GLSL=dump
So because it looks like it happens when compiling shaders I ran it with MESA_GLSL=dump. It loads and compiles most shaders at the beginning, that worked fine so I cut it off.
It occassionally seems to load new shaders, so after a while of gameplay with no output the attached stuff was printed and then immediately after that the game crashed.