https://bugs.freedesktop.org/show_bug.cgi?id=111077
--- Comment #14 from Matt Turner mattst88@gmail.com --- (In reply to roland@rptd.ch from comment #13)
I checked out the 18.2 branch which I assume should work (if the theory is correct).
Modifying files won't work with bisecting, right?
You'll probably have to 'git apply' the patch after each step, and 'git checkout -f' before each time you do 'git bisect good/bad'