[Dovecot] dovecot-1.1.rc3 assertion failure in index-sync.c

[richs at whidbey.net]

We just came across a mailbox today that, when accessed via POP3 or 
IMAP, crashes Dovecot.  It seems to be another index-related corruption 
issue (as removing "dovecot.index" for INBOX fixed it);

Using POP3:

dovecot: Apr 09 10:28:14 Warning: POP3(USERNAME): Maildir 
/mail/USERNAME/Maildir: UIDVALIDITY changed (1145576765 -> 1207677483)

dovecot: Apr 09 10:28:14 Panic: POP3(USERNAME): file index-sync.c: line 
39 (index_mailbox_set_recent_uid): assertion failed: 
(seq_range_exists(&ibox->recent_flags, uid))

dovecot: Apr 09 10:28:14 Error: POP3(USERNAME): Raw backtrace: pop3 
[0x80c04e4] -> pop3 [0x80c013c] -> pop3 [0x808eb9a] -> 
pop3(index_mailbox_set_recent_seq+0x3e) [0x808ebde] -> 
pop3(maildir_sync_index+0x923) [0x8064173] -> pop3 [0x8062e22] -> 
pop3(maildir_storage_sync_init+0x58) [0x8062f98] -> 
pop3(mailbox_sync+0x1f) [0x80912af] -> pop3(client_create+0x1de) 
[0x805968e] -> pop3(main+0x403) [0x805b503] -> 
/lib/libc.so.6(__libc_start_main+0xdc) [0x707dec] -> pop3 [0x8058e71]

dovecot: Apr 09 10:28:14 Error: child 28169 (pop3) killed with signal 6



Using IMAP (after "SELECT INBOX"):

dovecot: Apr 09 10:56:31 Warning: IMAP(USERNAME): Maildir 
/mail/USERNAME/Maildir: UIDVALIDITY changed (1145576765 -> 1207677483)

dovecot: Apr 09 10:56:31 Panic: IMAP(USERNAME): file index-sync.c: line 
39 (index_mailbox_set_recent_uid): assertion failed: 
(seq_range_exists(&ibox->recent_flags, uid))

dovecot: Apr 09 10:56:31 Error: IMAP(USERNAME): Raw backtrace: imap 
[0x80cd564] -> imap [0x80cd1bc] -> imap [0x809b32a] -> 
imap(index_mailbox_set_recent_seq+0x3e) [0x809b36e] -> 
imap(maildir_sync_index+0x923) [0x8070903] -> imap [0x806f5b2] -> 
imap(maildir_storage_sync_init+0x58) [0x806f728] -> 
imap(mailbox_sync+0x1f) [0x809da3f] -> imap(cmd_select_full+0xd5) 
[0x805dec5] -> imap(cmd_select+0x19) [0x805e069] -> imap [0x805f799] -> 
imap [0x805f827] -> imap [0x805ffb5] -> imap(client_input+0x5e) 
[0x80601ce] -> imap(io_loop_handler_run+0x100) [0x80d4d50] -> 
imap(io_loop_run+0x28) [0x80d42e8] -> imap(main+0x4ac) [0x8067bdc] -> 
/lib/libc.so.6(__libc_start_main+0xdc) [0x125dec] -> imap [0x8059d61]

dovecot: Apr 09 10:56:31 Error: child 7057 (imap) killed with signal 6


We made a copy of the mailbox and index in case any further testing 
would be helpful,

-Rich