[Dovecot] Dovecot raw backtrace when copying to folder

[Julian Cowley]

Seeing a problem with a certain user causing dovecot to crash when copying 
mail to a folder.  This looks similar to a bug someone on the mailing list 
posted recently.

Since the backtrace mentions the index, I tried deleting all of the index 
files for the user (including subfolders) but it had no effect. Seems that 
the bug still happens when creating the index for the first time.

Unfortunately, I can't pin down if there is a particular message causing 
the problem but I'll see if I can track it using strace.

Lines are broken for clarity.  This is dovecot 1.0.5 on CentOS 4.5.

Sep 27 16:41:42 cookie dovecot: imap-login: Login: user=<user at domain>,
     method=PLAIN, rip=::ffff:xx.xx.xx.xx, lip=::ffff:yy.yy.yy.yy, TLS
Sep 27 16:41:53 cookie dovecot: IMAP(user at domain): Trying to allocate 0 bytes
Sep 27 16:41:53 cookie dovecot: IMAP(user at domain): Raw backtrace:
     imap [0x80ad7d4] ->
     imap [0x80ad239] ->
     imap [0x80b5624] ->
     imap(i_malloc+0x1b) [0x80b0e1b] ->
     imap [0x8083037] ->
     imap [0x80833e6] ->
     imap(index_storage_search_init+0xf4) [0x80836f4] ->
     imap(cmd_copy+0x145) [0x8056d15] ->
     imap(cmd_uid+0x7c) [0x805a74c] ->
     imap [0x805b2d5] ->
     imap [0x805b25e] ->
     imap(_client_input+0x8c) [0x805b43c] ->
     imap(io_loop_handler_run+0x169) [0x80b3e09] ->
     imap(io_loop_run+0x28) [0x80b3178] ->
     imap(main+0x49f) [0x806384f] ->
     /lib/tls/libc.so.6(__libc_start_main+0xd3) [0x506de3] ->
     imap [0x8055db1]
Sep 27 16:41:53 cookie dovecot: child 26079 (imap) killed with signal 6