[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):

 I've made some mild progress throughout the day, was able to get valgrind
 logs of the crashing operation, and there are certainly invalid writes on
 dix/touch.c and Xi/exevents.c, concretely around the TouchListener array
 in the TouchPointInfoPtr struct, possibly something's going out of bounds
 and stepping over other memory. I'm compiling an xserver with extra
 debugging traces

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4061#comment:5>
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