[Dovecot] Index corruption causes child process to die

[Timo Sirainen]

On Sun, 2006-11-12 at 16:02 +0200, Timo Sirainen wrote:
> On Sun, 2006-11-12 at 15:52 +0200, Timo Sirainen wrote:
> > On Wed, 2006-11-08 at 20:46 +0100, Luigi Rosa wrote:
> > > Timo Sirainen said the following On 7/11/2006 22:39:
> > > 
> > > > Oh, right, the patch.
> > > 
> > > It happened again ad was more serious.
> > > 
> > > {two mail arrived from two different mailing lists, Thunderbirds moves 
> > > them in their mailbox but...}
> > > 
> > > Nov  8 20:36:44 mail dovecot: IMAP(lrosa): Fixed index file 
> > > /var/spool/mail2/lrosa/.Postfix/dovecot.index: 
> > > first_recent_uid_lowwater 10272 -> 10271
> > > Nov  8 20:36:44 mail dovecot: IMAP(lrosa): Corrupted index file 
> > > /var/spool/mail2/lrosa/.Postfix/dovecot.index: Duplicate header 
> > > extension keywords
> > > Nov  8 20:36:44 mail dovecot: child 12176 (imap) killed with signal 11
> ..
> > I tried reproducing this for a while with Thunderbird, but couldn't get
> > these kind of errors.
> 
> No, forget it. I was finally able to reproduce this myself after setting
> maildir_copy_with_hardlinks=yes. :) Now lets try to fix it..

Annoying. I tried to debug this for two hours, and it happened maybe 5
times, but after I had added enough debugging code it stopped doing it
completely (even without the debugging code).

I guess I'll have to write some test program which tries to emulate
Thunderbird and make this crash happen more easily.

I did anyway see that the index file gets about 13 of these keyword
extensions in it. Originally I thought there'd be just one extra, but
this is weird..
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