[Dovecot] Index corruption causes child process to die

[bofh list]

I am seeing the following errors with vanilla RC13 (two servers, nfs,
mmap_disable=yes, lock_method=fnctl, Maildir).  These only manifested after
the upgrade to 1.0RC13



server1:
dovecot: Nov 09 15:44:08 Error: IMAP(user1): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 15:44:08 Error: child 2920 (imap) killed with signal 6
dovecot: Nov 09 16:09:47 Error: IMAP(user2): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 16:09:47 Error: child 1894 (imap) killed with signal 6
dovecot: Nov 09 16:09:49 Error: IMAP(user2): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 16:09:49 Error: child 1887 (imap) killed with signal 6
dovecot: Nov 09 16:49:15 Error: IMAP(user3): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 16:49:15 Error: child 495 (imap) killed with signal 6
dovecot: Nov 09 17:51:36 Error: IMAP(user4): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 17:51:36 Error: child 7154 (imap) killed with signal 6
dovecot: Nov 09 19:09:21 Error: IMAP(user5): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 19:09:21 Error: child 6289 (imap) killed with signal 6
dovecot: Nov 09 22:56:31 Error: IMAP(user6): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 22:56:31 Error: child 13968 (imap) killed with signal 6
dovecot: Nov 10 11:17:41 Error: IMAP(user7): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 11:17:41 Error: child 25516 (imap) killed with signal 6
dovecot: Nov 10 12:34:10 Error: IMAP(user4): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 12:34:10 Error: child 24433 (imap) killed with signal 6
dovecot: Nov 10 12:34:26 Error: IMAP(user4): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 12:34:26 Error: child 25041 (imap) killed with signal 6
dovecot: Nov 10 13:06:36 Error: IMAP(user8): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 13:06:36 Error: child 29278 (imap) killed with signal 6


server2:
dovecot: Nov 09 14:42:39 Error: IMAP(user9): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 14:42:39 Error: child 31506 (imap) killed with signal 6
dovecot: Nov 09 14:47:36 Error: IMAP(user10): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 14:47:36 Error: child 30492 (imap) killed with signal 6
dovecot: Nov 09 16:01:33 Error: IMAP(user8): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 16:01:33 Error: child 31884 (imap) killed with signal 6
dovecot: Nov 09 17:51:36 Error: IMAP(user4): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 17:51:36 Error: child 5648 (imap) killed with signal 6
dovecot: Nov 09 20:08:26 Error: IMAP(user1): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 09 20:08:26 Error: child 5344 (imap) killed with signal 6
dovecot: Nov 10 10:11:12 Error: IMAP(user1): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 10:11:12 Error: child 25314 (imap) killed with signal 6
dovecot: Nov 10 10:17:35 Error: IMAP(user10): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 10:17:35 Error: child 25997 (imap) killed with signal 6
dovecot: Nov 10 10:35:19 Error: IMAP(user8): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 10:35:19 Error: child 25964 (imap) killed with signal 6
dovecot: Nov 10 11:14:31 Error: IMAP(user11): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 11:14:31 Error: child 24501 (imap) killed with signal 6
dovecot: Nov 10 11:41:49 Error: IMAP(user10): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 11:41:49 Error: child 28684 (imap) killed with signal 6
dovecot: Nov 10 13:07:12 Error: IMAP(user8): file ioloop.c: line 22
(io_add): assertion failed: (fd >= 0)
dovecot: Nov 10 13:07:12 Error: child 26323 (imap) killed with signal 6
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