https://bugzilla.kernel.org/show_bug.cgi?id=205049
--- Comment #17 from Pierre-Eric Pelloux-Prayer (pierre-eric.pelloux-prayer@amd.com) --- This bug has been fixed in Mesa, but is not part of a release yet.
So the 3 possible fixes are: - compile Mesa from git - or find a package for your distribution that contains Mesa git - or define this environment variable system-wide "AMD_DEBUG=nodcc" until Mesa 20 is released and your distribution is updated.