[tbb-bugs] #26514 [Applications/Tor Browser]: intermittent updater failures on Win64 (Error 19)

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#26514: intermittent updater failures on Win64 (Error 19)
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 Reporter:  mcs                       |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Very High                 |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  TorBrowserTeam201807      |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by mcs):

 So far, after many attempts, we have not reproduced this bug in an
 ESR60-based build. However, since it seems to be timing related, maybe we
 are just getting lucky (that no failures occur).

 Investigating the failures with the ESR52-based Tor Browser, we found that
 it is easy to reproduce in an optimized build. But we found that we cannot
 reproduce the problem after adding some logging to the libmar code.  We
 are now going to be smarter about the logging, e.g., we will not execute
 any additional code (and especially we will not log anything) until after
 an error occurs within libmar's signature verification code.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26514#comment:6>
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