[Dovecot] assertion failed and debugging dovecot

[Timo Sirainen]

On 12.10.2004, at 08:17, Doug Luce wrote:

> I'm getting this error on a particular message in my Maildir:
>
>   Oct 11 21:59:48 aurora dovecot: IMAP(doug): file ostream-file.c: 
> line 646 (_send_istream): assertion failed: (instream->v_offset <= 
> in_size)

I heard about the same problem today from someone else. Apparently this 
can be reproduced every time with some mail. Still waiting for that 
mail :)

> To me, more import than the question "why is this happening" is "how 
> can I debug this?"  Attaching gdb to the running imap process doesn't 
> give me access to the proper function names to set up breakpoints and 
> get a stack trace.
>
> Can someone with the experience give a quick how-to on debugging 
> functions deep in dovecot?

You should be able to attach gdb normally into it, as long as the 
binary isn't stripped, ie.:

gdb /usr/local/libexec/dovecot/imap pid
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