https://bugs.freedesktop.org/show_bug.cgi?id=57888
--- Comment #6 from Scott Moreau oreaus@gmail.com --- (In reply to comment #5)
Created attachment 71019 [details] [review] Possible fix
Does this patch help?
Yes this fixes the problem. The shaders work without error and the content is rendered which makes the game playable. Thanks for the quick help. I will leave this open until upstream gets the fix.