https://bugs.freedesktop.org/show_bug.cgi?id=90202
--- Comment #6 from Michel Dänzer michel@daenzer.net --- (In reply to Ernst Sjöstrand from comment #5)
The backtraces are when using DRI2.
What do you mean by that? As you pointed out yourself in comment #3, that backtrace is clearly from running with DRI3 enabled.