[Dovecot] Panic from 1.1.7

[Mike Abbott]

dovecot: Nov 24 12:49:06 Panic: IMAP(user): file ioloop-notify- 
kqueue.c: line 66 (event_callback): assertion failed: (io->refcount ==  
1)
dovecot: Nov 24 12:49:06 Error: IMAP(user): Raw backtrace:
  2   imap    0x0000000100068e82 default_fatal_finish + 41 ->
  3   imap    0x0000000100068eed i_syslog_fatal_handler + 0 ->
  4   imap    0x0000000100068687 i_info + 0 ->
  5   imap    0x000000010006fc0a event_callback + 216 ->
  6   imap    0x000000010006fdea io_loop_handler_run + 272 ->
  7   imap    0x000000010006f1bf io_loop_run + 38 ->
  8   imap    0x000000010006a319 dotlock_create + 532 ->
  9   imap    0x000000010006ac0f file_dotlock_create + 177 ->
  10  imap    0x000000010001a925 maildir_uidlist_lock_timeout + 169 ->
  11  imap    0x000000010001aa14 maildir_uidlist_sync_init + 66 ->
  12  imap    0x0000000100017d48 maildir_sync_context + 299 ->
  13  imap    0x000000010001809a maildir_storage_sync_init + 104 ->
  14  imap    0x000000010003e183 mailbox_sync + 31 ->
  15  imap    0x000000010000bcca imap_status_get + 132 ->
  16  imap    0x0000000100005355 cmd_status + 230 ->
  17  imap    0x0000000100006cb5 client_command_input + 33 ->
  18  imap    0x0000000100006e62 client_command_input + 462 ->
  19  imap    0x0000000100006f61 client_handle_input + 239 ->
  20  imap    0x00000001000070e8 client_input + 151 ->
  21  imap    0x000000010006fdea io_loop_handler_run + 272 ->
  22  imap    0x000000010006f1bf io_loop_run + 38 ->
  23  imap    0x000000010000e046 main + 1671 ->
  24  imap    0x0000000100001558 start + 52 ->
  25  ???     0x0000000000000001 0x0 + 1

Dovecot-1.1.7 on Mac OS X.

Fixed by http://hg.dovecot.org/dovecot-1.2/rev/2c111b572eee ?  (Just  
guessing.)