[tor-bugs] #29645 [Core Tor/Tor]: test.exe hangs on Appveyor CI

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#29645: test.exe hangs on Appveyor CI
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.4.1.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.4.1-alpha
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-ci, tor-windows, tor-test,       |  Actual Points:  0.3
  hang, tor-ci-fail-sometimes, 034-backport,     |
  035-backport, 040-backport                     |
Parent ID:                                       |         Points:  1
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * status:  new => needs_review
 * milestone:  Tor: unspecified => Tor: 0.4.1.x-final
 * priority:  Medium => High
 * version:   => Tor: 0.3.4.1-alpha
 * actualpoints:   => 0.3
 * keywords:  tor-ci, tor-windows, tor-test, hang, tor-ci-fail-sometimes =>
     tor-ci, tor-windows, tor-test, hang, tor-ci-fail-sometimes,
     034-backport, 035-backport, 040-backport


Comment:

 We've seen this issue on maint-0.3.5 and maint-0.4.0, so I'm going to
 assume that it affects all appveyor tests (0.3.4 and later).

 I've added a diagnostic that runs "make test", so we can see which test
 hangs:
 0.3.4: https://github.com/torproject/tor/pull/894
 0.3.5: https://github.com/torproject/tor/pull/895
   * testing only, clean merge
 0.4.0: https://github.com/torproject/tor/pull/896
   * line-based merge
 master: https://github.com/torproject/tor/pull/897
   * testing only, clean merge

 Please don't close after merging, we still need to fix the bug!

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29645#comment:6>
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