Re: [tor-bugs] #18116 [Tor]: abort in circuitmux_detach_all_circuits on Tor Browser exit with stem scripts running

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#18116: abort in circuitmux_detach_all_circuits on Tor Browser exit with stem
scripts running
-------------------------------------+------------------------------------
 Reporter:  teor                     |          Owner:  andrea
     Type:  defect                   |         Status:  assigned
 Priority:  Medium                   |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor                      |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:  crash TorCoreTeam201602  |  Actual Points:
Parent ID:                           |         Points:
  Sponsor:                           |
-------------------------------------+------------------------------------

Comment (by andrea):

 Is this reproducible? It sounds like something screwed up some cmux-
 internal data structures and it quite plausibly has the same cause as the
 line right above it:

 {{{
 00:12.000 [warn] Couldn't find circuit 2162585894 (for channel 599)
 }}}

 To find the cause of this, it'd be most helpful to figure out exactly
 where that warning came from; I suspect something destroyed a circuit
 without telling cmux about it.  IIRC I had to fix a few like this while
 writing cmux by finding everywhere we were doing anything like that and
 making sure they went through proper interfaces - perhaps something new
 was introduced recently that doesn't do that?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18116#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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