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[Chase Douglas <chase.douglas@xxxxxxxxxxxxx>]

According to the core dump, the gesture code was doing window hit-
testing, but the gesture code runs in a signal handler. If a gesture is
started while the window tree is being modified the server may crash.

My related branch above includes a new patch to block the SIGIO signal
while the window tree is being modified.

-- 
Xorg crashes when performing gesture
https://bugs.launchpad.net/bugs/670016
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