the last apitrace is not crashing anymore with newest mesa (10.4.3) and kernel
3.19, llvm 3.5.1

but the game still has the same hardlockup a few seconds later when running the
game.

I have uploaded a new apitrace at https://djinvi.net/jirafeau/f.php?h=35NcHizE
I checked that with glretrace, the hard lockup is reproductible.

I used to install mesa-git, but I get too much regressions, with the system
unable to boot, so I'm sticking with stable mesa on archlinux.