Comment # 1 on bug 71050 from Caolán McNamara

If you are on a rpm using system can we get the output of...
rpm -qf /usr/lib/dri/r600_dri.so
and try debuginfo-install mesa-dri-drivers and get the backtrace again so we
can see the details down in r600_dri.so

I suspect this happens on certain transitions and not all of them ?