[Bugs] #4061 sugar-toolkit-gtk3 IMME: Global gesture: can crash Sugar under certain circumstances

[Sugar Labs Bugs]

#4061: Global gesture: can crash Sugar under certain circumstances
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    Reporter:  erikos              |          Owner:  erikos  
        Type:  defect              |         Status:  new     
    Priority:  Immediate           |      Milestone:  0.98    
   Component:  sugar-toolkit-gtk3  |        Version:  0.97.x  
    Severity:  Blocker             |       Keywords:          
Distribution:  OLPC                |   Status_field:  Assigned
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Comment(by garnacho):

 Apparently we've been looking things from the wrong perspective... I
 traced that error so completely legit pipe errors due to X crashing :).
 From what I can see it always crashes around libc memory functions
 (malloc/calloc/free) in random (although related to touch) places.

 From my experience this is a memory corruption issue, it would be great to
 be able to start X under valgrind, although I need to learn 1) how to
 disable X autorestart and 2) start manually everything as if running from
 the session script, I'll be trying to replicate on my development machine
 too, looks like the presence of both a passive touch grab and an active
 grab have this triggered.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4061#comment:3>
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