https://bugs.freedesktop.org/show_bug.cgi?id=111241
--- Comment #7 from Dieter Nützel Dieter@nuetzel-hh.de --- Works for me with commit #
glsl: replace 'x + (-x)' with constant 0 https://cgit.freedesktop.org/mesa/mesa/commit/?id=47cc660d9c19572e5ef2dce7c8...
Thanks Pierre-Eric!