Instead of using sharedDisplay() GLContextGLX releases the context with the m_display member which is uninitialized. This apparently doesn't cause an issue on most machines, but has the potential to create a nasty crash.
Created attachment 141058 [details] Patch
Comment on attachment 141058 [details] Patch Good catch, Martin!
Comment on attachment 141058 [details] Patch Clearing flags on attachment: 141058 Committed r116585: <http://trac.webkit.org/changeset/116585>
All reviewed patches have been landed. Closing bug.