I noticed the problem even with Fedora 28 when I installed mesa-18.2.3 from a copr repository. At that time I treated it as a defect of the unofficial package. Now after the update to F29 I installed mesa-18.2.3 from "updates-testing" and it exhibits the very same problem. Attempts to bisect the issue did not get me anywhere because the issue does not seem to be a mesa issue. If I compile mesa -18.2.2 locally on my machine it misbehaves in exactly the same way as mesa-18.2.3. The only workaround for this issue is a downgrade to official mesa-18.2.2 packages. It would appear that some mesa dependency has changes at some point between mesa-18.2.2 and mesa-18.2.3 release and mesa packages built after this change are defective.
Relevant Freedesktop bugreport: https://bugs.freedesktop.org/show_bug.cgi?id=108646
Seems the culprit is gcc: compiled with gcc-8.2.1-2 it works, with gcc-8.2.1-4 it doesn't.
Confirmed. Rolling back to gcc-8.2.1-2 and rebuilding mesa (18.2.4 in my case) gets things back in order for me too. The amount of changes between the -2 and -4 releases seems to be too big for me to bisect this.
8.2.1-3 works. I'll try to svn-bisect the thingie. Why GNU isn't using GIT in 2018.
(In reply to Robert-André Mauchin from comment #3)
> 8.2.1-3 works. I'll try to svn-bisect the thingie. Why GNU isn't using GIT
> in 2018.
FWIW there's a git mirror of gcc svn:
*** This bug has been marked as a duplicate of bug 1645400 ***