[tor-dev] Tor crash debug

[Nurmi, Juha]

Thanks for debugging help! I created a ticket:

https://trac.torproject.org/projects/tor/ticket/18930#ticket

-Juha

On Fri, Apr 29, 2016 at 7:28 AM, Roger Dingledine <arma at mit.edu> wrote:

> On Fri, Apr 29, 2016 at 02:24:20PM +1000, Tim Wilson-Brown - teor wrote:
> > > Program received signal SIGSEGV, Segmentation fault.
> > > 0x00005555555c02d6 in rend_client_get_random_intro_impl (
> > >    entry=0x5555555bf1bf <rend_client_fetch_v2_desc+114>, strict=0,
> warnings=0)
> > >    at src/or/rendclient.c:1353
> > > 1353      smartlist_add_all(usable_nodes, entry->parsed->intro_nodes);
> > >
> > > Any ideas what is the problem? Is there anything more I could do to
> debug this?
> >
> > Looks like either "entry" or "parsed" is NULL.
> >
> > You could tell us what version of tor you're running (it's not master,
> the line numbers are wrong), and give us the last few log messages before
> the crash.
>
> Yep! Also, the output of 'bt all' could be useful.
>
> See https://www.torproject.org/docs/faq#TorCrash for more things
> to think about -- the debug-level log right before it happens will
> be useful, and also knowing when during operation it happens (soon
> after? reliably? etc), and also your torrc.
>
> But most importantly, you should open a ticket on trac and start
> accumulating details there. That way the history will be on the
> trac ticket, and people can follow it there rather than here.
>
> Thanks,
> --Roger
>
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