[tor-bugs] #2933 [Tor Client]: Error from libevent: evdns.c:1360: Assertion req != port->pending_replies failed in server_port_flush

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#2933: Error from libevent: evdns.c:1360: Assertion req != port->pending_replies
failed in server_port_flush
------------------------+---------------------------------------------------
 Reporter:  mr-4        |          Owner:                     
     Type:  defect      |         Status:  needs_review       
 Priority:  normal      |      Milestone:                     
Component:  Tor Client  |        Version:  Tor: 0.2.2.24-alpha
 Keywords:              |         Parent:                     
   Points:              |   Actualpoints:                     
------------------------+---------------------------------------------------

Comment(by mr-4):

 Replying to [comment:9 nickm]:
 > Yup.  Apply it to libevent-2.0.10, and make sure that the version of tor
 you're using is really linked against the updated libevent.
 >
 > If the patch *doesn't* work, and you know how to use gdb, it would be
 good to get a stack trace here, and to see the values of "port",
 "port->pending_replies", and *port->pending_replies".
 >
 > Otherwise, if the patch doesn't work, and you *don't* know how to use
 gdb, I'll try to come up with another patch to dump a bunch of debugging
 info or something.
 OK, I now inadvertently changed the description of this bug :((( Sorry
 about that, is there any way I could restore the previous description?
 Originally, I meant to post this instead:

 Damn!

 I just realised that I have to build this from source! Nick, if you are
 reading this I would (possibly) need some assistance!

 The machine on which all this is going to run is very old i686 (Pentium2)
 box, which has a read-only (locked up) kernel code and libraries (it runs
 as part of my dmz). I normally build the entire image for this machine
 (Fedora kickstart file) on my dev machine (x86_64 Core2).

 That means I would need to 1) be able to cross-compile libevent2 (never
 attempted that before); and 2) build Fedora rpm so that my kickstart could
 use it.

 From what I remember Rawhide for FC15 has libevent2 (2.0.10), which means
 that I would be able to grab the source rpm. Even though I have
 successfully altered the .spec file for quite a few packages to enable
 them to cross-compile successfully (one reason I am banging on about
 libevent-devel to be changed to enable cross-compilation!) it is not a
 precise science.

 Are there any peculiarities in libevent2 I should be aware of before I
 attempt to do cross-compilation of libevent2 (I will, of course, report
 back here if there are problems)?

 As for your request above Nick, I haven't used gdb for about 8 years, so
 it is safe to say that I wouldn't be able to use it (grumble).

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2933#comment:10>
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