[Bugs] #4989 Sugar UNSP: Can't stop sugar

[Sugar Labs Bugs]

#4989: Can't stop sugar
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       Reporter:  FGrose                     |       Owner:
           Type:  defect                     |      Status:  new
       Priority:  Unspecified by Maintainer  |   Milestone:  Unspecified
      Component:  Sugar                      |     Version:  Unspecified
       Severity:  Unspecified                |    Keywords:
Distribution/OS:  Fedora                     |  Bug Status:  Unconfirmed
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 Observed in SoaS 26 alpha dnf upgraded to 09-Jun-2017.

 Observed after a testing session where an Activity was downgraded and then
 later upgraded (among other things).

 On trying to shutdown an alert message appeared:
   An activity is not responding.
   You may lose unsaved work if you continue.    (nn) Continue  (x) Cancel
 Pressing the Continue button closed the alert but had no other effect.
 This was attempted several times. Also tried Cancel.  Also tried restart.

 After capturing a log and preparing a bug report and testing again I got
 into a state with no Activity icons in the Frame and no access to the
 Journal.  A subsequent restart allowed me to capture another log and
 recreate a bug ticket.

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Ticket URL: <https://bugs.sugarlabs.org/ticket/4989>
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