[tbb-bugs] #31567 [Applications/Tor Browser]: NS_tsnprintf() does not handle %s correctly on Windows

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#31567: NS_tsnprintf() does not handle %s correctly on Windows
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 Reporter:  mcs                                  |          Owner:  gk
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Critical                             |     Resolution:
 Keywords:  ff68-esr, tbb-9.0-must-alpha,        |  Actual Points:
  TorBrowserTeam201908                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by mcs):

 Replying to [comment:28 gk]:
 > mcs/brade: Oh, and don't let my above comment stop you from debugging if
 you have the time and energy for that. :) Or let me know about some
 shortcuts I could take to figure out what is going on.

 OK. The thing that does not make sense to me is that on 2019-08-29 Kathy
 and I were able to successfully run an update with our own Windows build
 after we replaced all of the `%s` format specifiers with `%S`. That test
 was interactive (using our own mar file and update server, and with tor-
 browser just patched for our own signing certificate and to use a
 different `app.update.url`). If there was another mingw-w64 bug we should
 have encountered it during that test.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31567#comment:29>
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