Bug#944915: libldap-2.4-2: Segmentation fault in "ldap_unbind_ext"

[devel at sumpfralle.de]

Hello Bernhard,


Am Tue, 19 Nov 2019 11:55:54 +0100
schrieb Bernhard Übelacker <bernhardu at mailbox.org>:

> just a wild guess - is claws-mail doing these ldap queries
> in parallel in different threads? This in combination with
> the unsteady connection to the server could make two threads
> operate on the same structures?

An interesting idea!
I could imagine, that claws-mail's maintainer will appreciate this hint.
(I guess, I will open a bug report against claws-mail upstream)


> In that case following gdb output would show all
> threads with their backtraces:
>     (gdb) thread apply all bt

indeed this was the command, that I used to generate the gdb output.


> Or with showing also the variables:
>     (gdb) thread apply all bt full

Next time I will also use this one.


> And how do you get the backtraces? Are you running
> with a gdb attached to it permanently?

Yes, I am doing this for claws-mail at the moment.


> Then you could create a core when the crash happened with
>     (gdb) generate-core-file /home/someone/corefile

Good point - I will try this next time.


Thank you for your hints!

Cheers,
Lars