https://bugs.freedesktop.org/show_bug.cgi?id=74718
--- Comment #7 from Török Edwin edwin+mesa@etorok.net --- (In reply to comment #6)
BTW I've found another bug (failing assertion in mesa core on debug builds) when replaying your trace file (attachment 93670 [details]). see bug 74723
After the fix in c325ec896545cc909f2f0e359f0bb0513a8a53b5 I don't get any assertion with --enable-debug, only these messages:
669: glDebugOutputCallback: High severity Shader Compiler unknown issue 1, 0:2(12): warning: extension `GL_EXT_gpu_shader4' unsupported in geometry shader 673: glDebugOutputCallback: High severity Shader Compiler unknown issue 2, 0:2(12): warning: extension `GL_EXT_gpu_shader4' unsupported in fragment shader