(In reply to comment #18)
> https://bugs.freedesktop.org/attachment.cgi?id=74306

I've tried quite hard on both 64 bit and 32 bit setups and with both patches
applied can no longer get any corruption.

One thing I did notice is that there is a slight difference between running the
sdl and glx versions, in that the sdl has a few strange chars in console - but
it's the same with llvmpipe.

Are you running glx or sdl?

Can you get any corruption if you run it with the env

LIBGL_ALWAYS_SOFTWARE=1