Comment 3 for bug 1017914

On followings calls to the program, it generates core dumps or this message:

prepare-window-handle
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
python: ../../src/xcb_io.c:273: poll_for_event: La declaración `!xcb_xlib_threads_sequence_lost' no se cumple.

It is difficult to reproduce, but there are some memory corruption, probably with some module that try to release memory twice