Timo,

I saw a couple of these cores over the weekend. The syslog says:

May 21 19:04:48 emerald dovecot: [ID 107833 mail.error] IMAP(user): Corrupted index cache file /home/students/s/user/.imap/sent-mail-apr-2004/dovecot.index.cache: indexid changed

With a resulting core file from imap at this time. I also discovered a remaining lock file on the person's imap file:

-rw------- 1 user user 3088940 May 10 2004 sent-mail-apr-2004 -rw------- 1 user user 13 May 21 19:04 sent-mail-apr-2004.lock

The lockfile contains the pid of the process that cores:

May 21 19:04:48 emerald dovecot: [ID 684838 mail.error] child 17480 (imap) killed with signal 11

The gdb output of the core file is attached.

Jeff Earickson Colby College