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

Tor Bug Tracker & Wiki blackhole at torproject.org
Tue Aug 14 15:02:05 UTC 2018

#26514: intermittent updater failures on Win64 (Error 19)
 Reporter:  mcs                       |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_review
 Priority:  Very High                 |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  TorBrowserTeam201808R     |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
Changes (by mcs):

 * status:  new => needs_review
 * keywords:  TorBrowserTeam201808 => TorBrowserTeam201808R


 Replying to [comment:19 jacek]:
 > As a less radical solution could be using fseek64 and ftello64. Those
 are much thinner wrappers in mingw-64 around msvcrt.dll. You could try
 that by changing defines in mar_private.h

 Thank you for your analysis and for this suggestion. It appears to solve
 the problem nicely. After reading the other code (ftelli64 and _fseeki64),
 it is difficult to say where the problem is but some aspects seem to rely
 on internal Microsoft flags, etc. and certainly there is complexity there
 (as you said). Anyway, here is a patch that works for Kathy and me:

 We tested on an up-to-date Windows 10 system. 200 incremental updates and
 200 complete updates all completed without any signature verification

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26514#comment:20>
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