[Dovecot] imap: assertion failed

This error is returned when reading a certain message using Squirrelmail.

Any help on tracing the cause of this is greatly appreciated.

From the logs:

dovecot: Nov 20 13:00:29 Error: IMAP(kimc): file ostream-file.c: line 643 (_send_istream): assertion failed: (instream->v_offset <= in_size) dovecot: Nov 20 13:00:29 Error: child 27873 (imap) killed with signal6

-kim

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