FreeBSD 4.10-RELEASE, dovecot-1.0-test29 crashes on sort and thread commands:

Jul 25 15:12:08 owl dovecot: imap-login: Login: dima [81.19.64.101] Jul 25 15:12:26 owl dovecot: IMAP(dima): file index-mail-headers.c: line 408 (index_mail_get_header): assertion failed: (ret != 0) Jul 25 15:12:26 owl dovecot: child 20384 (imap) killed with signal 6

(gdb) bt #0 0x281e0fc4 in kill () from /usr/lib/libc.so.4 #1 0x2822293e in abort () from /usr/lib/libc.so.4 #2 0x8086c73 in i_internal_panic_handler ( fmt=0x8095720 "file %s: line %d (%s): assertion failed: (%s)", args=0xbfbff8cc "\tW\t\b\230\001") at failures.c:374 #3 0x8086827 in i_panic ( format=0x8095720 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:173 #4 0x806d0f9 in index_mail_get_header (_mail=0x80bf41c, field=0x80955ce "Date") at index-mail-headers.c:408 #5 0x806b8fd in index_mail_get_date (_mail=0x80bf41c, timezone=0x0) at index-mail.c:218 #6 0x8059b1c in mail_sort_input (ctx=0x80a1150, mail=0x80bf41c) at imap-sort.c:420 #7 0x80596ae in imap_sort (client=0x80ad180, charset=0x80b1180 "US-ASCII", args=0x80c8010, sort_program=0x80a10d0) at imap-sort.c:252 #8 0x8054ec8 in cmd_sort (client=0x80ad180) at cmd-sort.c:123 #9 0x80560ae in client_handle_input (client=0x80ad180) at client.c:318 #10 0x805614d in _client_input (context=0x80ad180) at client.c:354 #11 0x808a852 in io_loop_handler_run (ioloop=0x80ab040) at ioloop-poll.c:193 #12 0x808a245 in io_loop_run (ioloop=0x80ab040) at ioloop.c:248 #13 0x805bc5b in main (argc=1, argv=0xbfbffbb0, envp=0xbfbffbb8) at main.c:217 (gdb)