[tor-bugs] #27073 [Core Tor/Tor]: conditionvar_timeout intermittently fails on maint-0.3.3

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#27073: conditionvar_timeout intermittently fails on maint-0.3.3
------------------------------+-----------------------------------
     Reporter:  teor          |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: unspecified
    Component:  Core Tor/Tor  |    Version:  Tor: 0.3.3.8
     Severity:  Normal        |   Keywords:  regression?, tor-test
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+-----------------------------------
 util/thread/conditionvar_timeout failed in the last maint-0.3.3 build:
 https://travis-ci.org/torproject/tor/builds/411701508

 With the following message:
 {{{
 util/thread/conditionvar_timeout: [forking]
   FAIL src/test/test_threads.c:285: assert(ti->n_timeouts OP_EQ 2): 1 vs
 2Aug 03 13:03:59.190 [err] Error 16 destroying a mutex.
 Aug 03 13:03:59.190 [err] tor_assertion_failed_(): Bug:
 src/common/compat_pthreads.c:172: tor_mutex_uninit: Assertion 0 failed;
 aborting. (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug: Assertion 0 failed in tor_mutex_uninit at
 src/common/compat_pthreads.c:172. Stack trace: (on Tor 0.3.3.8-dev
 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(log_backtrace+0x46)
 [0x55cd7c253ec6] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:
 ./src/test/test(tor_assertion_failed_+0xe4) [0x55cd7c294434] (on Tor
 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(tor_mutex_uninit+0xa6)
 [0x55cd7c29d736] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(tor_mutex_free_+0x25)
 [0x55cd7c262dc5] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(+0x54508a)
 [0x55cd7bed908a] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(+0x5c840d)
 [0x55cd7bf5c40d] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(testcase_run_one+0x310)
 [0x55cd7bf5c7d0] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(tinytest_main+0x1eb)
 [0x55cd7bf5d58b] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(main+0x4e9)
 [0x55cd7bbb61b9] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     /lib/x86_64-linux-
 gnu/libc.so.6(__libc_start_main+0xf5) [0x2b2813951f45] (on Tor 0.3.3.8-dev
 2a6c1585b0f13e03)
 Aug 03 13:03:59.191 [err] Bug:     ./src/test/test(+0x224fdb)
 [0x55cd7bbb8fdb] (on Tor 0.3.3.8-dev 2a6c1585b0f13e03)
 [Lost connection!]
   [conditionvar_timeout FAILED]
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27073>
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