[Dovecot] 1.0-test53, sig11 when sorting by thread

Hello.

When trying to sort a folder by thread (with pine4.61), I get a sig11. The mailstore is Maildir, indexes stored in /var/indexes/%u.

The syslog on the server shows this:

Nov 29 11:37:55 olan dovecot: IMAP(kowalski): Corrupted index cache file /var/indexes/kowalski/.INBOX/dovecot.index.cache: record points outside file Nov 29 11:37:56 olan dovecot: child 14344 (imap) killed with signal 11

A backtrace of the core is attached.

Thanks.

PS: I tried with mbox mailstore, and got the same sig11.

-- Nicolas