[Dovecot] rc17: child 15802 (auth) killed with signal 6

[Chris Laif]

I'm using dovecot (rc17) in POP3/IMAP server _and_ proxy mode (pgsql
backend). Everything works fine but occasionally I get these messages
in the log:

dovecot: auth(default): file passdb.c: line 126
(passdb_handle_credentials): assertion failed: (password != NULL)
dovecot: auth(default): Raw backtrace: dovecot-auth [0x8062b2b] ->
dovecot-auth [0x8062599] -> dovecot-auth [0x805a6ae] -> dovecot-auth
[0x805b3b8] -> dovecot-auth [0x8060350] ->
dovecot-auth(io_loop_handler_run+0x118) [0x8066458] ->
dovecot-auth(io_loop_run+0x28) [0x80658e8] -> dovecot-auth(main+0x78)
[0x8057028] -> /lib/libc.so.6(__libc_start_main+0xc6) [0x4007ee36] ->
dovecot-auth [0x804f591]
dovecot: child 15802 (auth) killed with signal 6

I seems (!) that these messages only appear when someone uses dovecot
in in IMAP proxy mode.

As I said before, everything works fine -- even reading emails via
IMAP-proxy works.

Chris