[Dovecot] lmtp proxy signal 11 in dovecot 2.0.6

[Oliver Eales]

Hello,

i am using the lmtp proxy and dovecot 2.0.6
When (in my case caused by an erroneous config in the backend lmtp 
server), the backend lmtp cannot find the user, the proxy dies with a 
signal 11.

220 backend Dovecot LMTP ready
LHLO proxy
MAIL FROM:<user at domain>
250-backend
250-8BITMIME
250-ENHANCEDSTATUSCODES
250 PIPELINING
250 2.1.0 OK
RCPT TO:<user>
550 5.1.1 <user> User doesn't exist: user

..signal 11 within the LMTP proxy.

Trace from lmtp proxy:

#0  0x00007f7a979f24d3 in i_stream_next_line () from 
/usr/lib64/dovecot/libdovecot.so.0
No symbol table info available.
#1  0x00007f7a979f25b8 in i_stream_read_next_line () from 
/usr/lib64/dovecot/libdovecot.so.0
No symbol table info available.
#2  0x00007f7a97c3125c in lmtp_client_input () from 
/usr/lib64/dovecot/libdovecot-lda.so.0
No symbol table info available.
#3  0x00007f7a979f75db in io_loop_handler_run () from 
/usr/lib64/dovecot/libdovecot.so.0
No symbol table info available.
#4  0x00007f7a979f66f8 in io_loop_run () from 
/usr/lib64/dovecot/libdovecot.so.0
No symbol table info available.
#5  0x00007f7a979e4f53 in master_service_run () from 
/usr/lib64/dovecot/libdovecot.so.0
No symbol table info available.
#6  0x00007f7a98330933 in main () from /usr/lib/dovecot/lmtp
No symbol table info available.

Regards,
Oliver