https://bugs.freedesktop.org/show_bug.cgi?id=66632
--- Comment #3 from Lauri Kasanen curaga@operamail.com --- No, I'm afraid you need git + patches to test.
You can build a local mesa and test it without installing, that way your system is not at risk.
./configure --etc etc && make export LD_LIBRARY_PATH=lib export LIBGL_DRIVERS_PATH=lib/gallium # now everything in this shell will use the new driver
glxinfo # check the output xonotic --etc-etc