[Dovecot] Bug report - crash on group lookup

[Timo Sirainen]

On Fri, 2012-05-25 at 18:52 +0200, Peter Meier wrote:

> I was doing some migration from a 1.2 installation to a 2.1. While
> testing my new installation dovecot crashed at two test-cases constantly
> with with a "Panic: Trying to allocate 0 bytes" message.
..
> I see two problems:
> 
> 1. Don't panic while "looking" up a group
> 2. Give a meaningful error messages.

Asserts/Panics can't give very meaningful error messages to users,
because they only happen when there's a bug in the code. The resulting
raw backtrace is helpful to coders though :) Fixed:
http://hg.dovecot.org/dovecot-2.1/rev/fe688ecd7564