dovecot - Oct 2007 - Segfault by asking for a folder?

I 'hg pull'ed and now my Dovecot segfaults when I select a particular 
folder.  I've removed all files with 'index' in the name, so I
don't think
it's due to bad indexes.

 	Oct 21 09:18:40 alchemy dovecot: Dovecot v1.1.beta3 starting up
 	Oct 21 09:18:47 alchemy dovecot: imap-login: Login: user=<paulproteus>,
 	method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, TLS
 	Oct 21 09:18:47 alchemy dovecot: child 28714 (imap) killed with signal 11

is in syslog.

I haven't stripped the binaries as far as I know, yet here's what seems
to
happen in gdb:

 	paulproteus at alchemy:~/dovecot.rawlog $ gdb dovecot
[snip]
 	This GDB was configured as "i486-linux-gnu"...
 	Using host libthread_db library
"/lib/tls/i686/cmov/libthread_db.so.1".
 	(gdb) set args --exec-mail imap
 	(gdb) run
 	Starting program: /usr/local/sbin/dovecot --exec-mail imap
 	* PREAUTH [CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES MULTIAPPEND
 	UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS UIDPLUS
 	LIST-EXTENDED] Logged in as paulproteus
 	01 SELECT pinerc

 	Program received signal SIGSEGV, Segmentation fault.
 	Cannot remove breakpoints because program is no longer writable.
 	It might be running in another process.
 	Further execution is probably impossible.
 	0x08073d0d in ?? ()
 	(gdb) bt
 	#0  0x08073d0d in ?? ()
 	#1  0xbff92f70 in ?? ()
 	#2  0x00000000 in ?? ()
 	(gdb) bt full
 	#0  0x08073d0d in ?? ()
 	No symbol table info available.
 	#1  0xbff92f70 in ?? ()
 	No symbol table info available.
 	#2  0x00000000 in ?? ()
 	No symbol table info available.
 	(gdb)

Uh?  It seems to also segfault the same way if I select INBOX.

-- Asheesh.

--
You'll never see all the places, or read all the books, but fortunately,
they're not all recommended.

On Sun, 21 Oct 2007, Asheesh Laroia wrote:
> I 'hg pull'ed and now my Dovecot segfaults when I select a
particular folder.
> I've removed all files with 'index' in the name, so I don't
think it's due to
> bad indexes.
I 'hg bisect'ed between 1.1.beta3 and the tip with this as my test:

sh autogen.sh && ./configure && make && sudo make
install && echo 'lol SELECT pinerc' | dovecot --exec-mail imap

If it didn't segfault, I would tell hg 'hg bisect good'; if it did,
I did
'hg bisect bad'.  At the end of it all, hg told me:

paulproteus at alchemy:~/dnlds/dovecot $ hg bisect good
The first bad revision is:
changeset:   6599:a6f51026b969
branch:      HEAD
user:        Timo Sirainen <tss at iki.fi>
date:        Sun Oct 21 18:54:32 2007 +0300
summary:     Added maildir_uidlist_init_readonly() and 
maildir_uidlist_get_uid().

I haven't actually examined this changeset (yet? perhaps tomorrow), but 
hopefully finding it as the problem will help figure out what's up.

This was my first VCS-coordinated bisection.  Yippee!

-- Asheesh.

--
"Being against torture ought to be sort of a multipartisan thing."
		-- Karl Lehenbauer, as amended by Jeff Daiell, a Libertarian