[tor-bugs] #23393 [Applications/Tor Browser]: All tabs often crash when closing one tab

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#23393: All tabs often crash when closing one tab
-------------------------------------------------+-------------------------
 Reporter:  SaturnusDJ                           |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-e10s, tbb-crash,                 |  Actual Points:
  TorBrowserTeam201709R, GeorgKoppen201709       |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by arthuredelstein):

 Looks good to me too. I wonder if there's an advantage in keeping this
 commit separate, because the main canvas patch is in the process of
 getting uplifted and we don't want to lose track of this extra fix. Though
 I'm not sure if this fix is relevant to the Mozilla version.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23393#comment:18>
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