https://bugs.freedesktop.org/show_bug.cgi?id=64471
--- Comment #5 from Zoltán Böszörményi zboszor@pr.hu --- The lockup also happens with mesa commit 0b5b3f8816f9cb5a2b2259176b4c7dd9e4d31233 and llvm-3.3, whatever commit it is at in current Fedora 19 beta.