https://bugs.freedesktop.org/show_bug.cgi?id=73528
--- Comment #45 from MirceaKitsune sonichedgehog_hyperblast00@yahoo.com --- I apologize for my stupidity: I just noticed the commit mentioned above is dated 02-08-2015, meaning more than 3 months ago. I have MESA 11.0.5 installed, which is very recent so it must include that commit. There are indeed no problems with the shaders and the problem stays fixed, so all is good :)