dovecot - Oct 2012 - Problems with Virtual and mail-search.c

First, I don't know why but dovecot gots this error.
Oct 15 13:24:02 widder dovecot: imap(limon): Panic: file mail-search.c: 
line 90 (mail_search_args_init_sub): assertion failed: 
(arg->value.keywords == NULL)
Then, when I tried to run
SELECT "INBOX/Code" (UNSEEN)
virtual plugin got a segfault.
Oct 15 13:24:03 widder kernel: imap[22749]: segfault at 2c ip b757f8ec 
sp bfa3a160 error 4 in 
lib20_virtual_plugin.so[b7579000+d000][b74b0000+d000]

I'm running gentoo with kernel 2.6.32.12. My dovecot version is 2.1.10. 
I applied

http://hg.dovecot.org/dovecot-2.1/raw-diff/0306792cc843/src/lib-storage/mail-search.c

But still, i'm getting this problem.

Thanks,
Levent Dane

On 18.10.2012, at 1.40, Levent Dane wrote:
> First, I don't know why but dovecot gots this error.
> Oct 15 13:24:02 widder dovecot: imap(limon): Panic: file mail-search.c:
line 90 (mail_search_args_init_sub): assertion failed: (arg->value.keywords
== NULL)
> Then, when I tried to run
> SELECT "INBOX/Code" (UNSEEN)
> virtual plugin got a segfault.
> Oct 15 13:24:03 widder kernel: imap[22749]: segfault at 2c ip b757f8ec sp
bfa3a160 error 4 in lib20_virtual_plugin.so[b7579000+d000][b74b0000+d000]
I can't reproduce this. What contents do you have in dovecot-virtual files?
Also doveconf -n output and gdb backtrace would be helpful:
http://dovecot.org/bugreport.html