lmtp segfault after upgrade

[Tom Sommer]

On 2017-05-01 19:34, Aki Tuomi wrote:
>> On May 1, 2017 at 8:26 PM Aki Tuomi <aki.tuomi at dovecot.fi> wrote:
>> 
>> 
>> 
>> > On May 1, 2017 at 8:21 PM Tom Sommer <mail at tomsommer.dk> wrote:
>> >
>> >
>> > I just upgraded our Director to 2.2.29.1 from 2.2.26, and now my dmesg
>> > and /var/log/messages are getting flooded by these errors:
>> >
>> > lmtp[45758]: segfault at 21 ip 00007fb412d3ad11 sp 00007ffe83ad2df0
>> > error 4 in libdovecot.so.0.0.0[7fb412c95000+11c000]
>> >
>> > Any ideas?
>> >
>> > --
>> > Tom
>> 
>> Try get a core dump and run it thru gdb.
>> 
>> Aki
> 
> Also, dovecot should log some kind of trace and message into syslog or
> whatever log_path points to.

Only this:

May 02 09:00:34 lmtp(17467): Fatal: master: service(lmtp): child 17467 
killed with signal 11 (core dumps disabled)

.. and lots of them.