Comment 6 for bug 348428

log snippet that show the bug

"exaCopyDirty: Pending damage region empty!
*** glibc detected *** /usr/bin/X: double free or corruption (out): 0x0d73de98 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7ba8604]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb7baa5b6]
/usr/lib/libdrm_intel.so.1[0xb77e6837]
/usr/lib/libdrm_intel.so.1[0xb77e6bca]
/usr/lib/libdrm_intel.so.1[0xb77e6bf4]
/usr/lib/libdrm_intel.so.1[0xb77e6cb2]
/usr/lib/libdrm_intel.so.1(drm_intel_bo_unreference+0x16)[0xb77e5336]
/usr/lib/xorg/modules/drivers//intel_drv.so(gen4_render_state_cleanup+0x5c)[0xb78561dc]
/usr/lib/xorg/modules/drivers//intel_drv.so[0xb782965d]
/usr/bin/X[0x80de20a]
/usr/bin/X(xf86Wakeup+0x287)[0x80c82a7]
/usr/bin/X(WakeupHandler+0x52)[0x8091352]
/usr/bin/X(WaitForSomething+0x1bb)[0x813284b]
/usr/bin/X(Dispatch+0x7e)[0x808d2ee]
/usr/bin/X(main+0x3bd)[0x807231d]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5)[0xb7b4f775]
/usr/bin/X[0x80717d1]"