[tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed while trying to download a file

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#21766: Tor Browser based on ESR52 with e10s enabled crashed while trying to
download a file
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 Reporter:  gk                                   |          Owner:  mcs
     Type:  defect                               |         Status:
                                                 |  assigned
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Critical                             |     Resolution:
 Keywords:  ff52-esr, tbb-e10s, tbb-crash,       |  Actual Points:
  TorBrowserTeam201705, tbb-7.0-must             |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
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Comment (by mcs):

 Update: The fix works for Kathy and me on Linux as well, unless the file
 being downloaded is so small that the network traffic is finished before
 we try to call `Suspend()` (Kathy and I happen to have a tiny 344 byte zip
 file that we were testing with among other larger files). We are now
 trying to modify the patch so that it only suspends if necessary.

 Any takers for testing on Windows, or should we simply wait for a nightly
 build? Kathy and I don't have a good standlone (non-gitian) Windows build
 setup, or at least we have not tried to build an ESR52-based browser
 there. But we should be able to do a gitian-based build if necessary.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21766#comment:32>
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