https://bugs.freedesktop.org/show_bug.cgi?id=97524
--- Comment #9 from Matias N. Goldberg dark_sylinc@yahoo.com.ar --- Oh I see what's happening.
That's my fault.
The paths to the shader files were hardcoded as absolute paths.
Look for: readFile( "/home/matias/Projects/MesaRing0Bug/src/VertexShader_vs.glsl", data, FILE_BUF );
and: readFile( "/home/matias/Projects/MesaRing0Bug/src/PixelShader_ps.glsl", data, FILE_BUF );
Change the hardcoded paths, and try again. Sorry about that.