https://bugs.freedesktop.org/show_bug.cgi?id=91985
--- Comment #4 from Kai kai@dev.carbon-project.org --- I've sent a patch to the mailing list: http://thread.gmane.org/gmane.comp.video.mesa3d.devel/112810
It at least compiles again for me, but I can't say for sure, if this is the correct fix.