[Bugs] #1334 UNSP: Exposed secondary toolbar causes intermittent Activity lockup on "Stop" requiring a force-quit

[SugarLabs Bugs]

#1334: Exposed secondary toolbar causes intermittent Activity lockup on "Stop"
requiring a force-quit
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    Reporter:  garycmartin                |          Owner:  tomeu            
        Type:  defect                     |         Status:  new              
    Priority:  Unspecified by Maintainer  |      Milestone:  0.86             
   Component:  sugar                      |        Version:  Git as of bugdate
    Severity:  Critical                   |       Keywords:                   
Distribution:  Unspecified                |   Status_field:  Unconfirmed      
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 F11 sugar-jhbuild environment:

 Having an exposed secondary toolbar causes intermittent Activity lockup
 when you try and Stop it. The activity will just stop responding to all UI
 attempts, but if you use the Frame Activitytray palette and issue a second
 Stop from there, after 5-10sec Metacity will pop-up a dialogue "<activity
 name> is not responding (force-quit) (wait)" (see attached screen shots).

 I was intermittently seeing this while working on Write toolbars (I
 launched that a 100 or so times while working/testing, perhaps saw 5-10
 lockups) . Then I saw the same thing intermittently while working on
 Calculate toolbars. Panicking that it's something I might be doing I've
 just tested the latest Browse and after 6 resume -> expose a secondary
 palette -> stop cycles, it just locked up a well requiring a force-quit,
 also just tested the same thing in Terminal on the 6th attempt.

 To reproduce:

 1) Resume any activity with new toolbars from home (e.g. Terminal)
 2) Click to lock open one of the secondary toolbars (e.g. Tab toolbar)
 3) Click the Stop icon
 4) Repeat from step 1 until activity fails to stop

 Once the activity has locked up, top shows it running at 50% cpu load, the
 activity icon in the top frame can be used to stop the activity, after
 5-10sec Metacity will provide a force quit dialogue.

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Ticket URL: <http://dev.sugarlabs.org/ticket/1334>
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