dovecot - Jan 2011 - master: Error: service(imap): child 40100 killed with signal 11

Hello,
I've just updated to 2.0.9 and I've got lots of these in the logs now.

Jan 13 18:57:13 master: Error: service(imap): child 40100 killed with
signal 11 (core not dumped - set service imap { drop_priv_before_exec=yes })

Is there a configuration change or something else I should have done
while updating?

I tried to get some information by loading the binary into gdb and got this:

(gdb) bt full
#0  0x00000008007c71fc in kevent () from /lib/libc.so.7
No symbol table info available.
#1  0x00000008005a8281 in io_loop_handler_run () from
/usr/lib/dovecot/libdovecot.so.0
No symbol table info available.
#2  0x0000000000000707 in ?? ()
No symbol table info available.
#3  0x00000000000f4138 in ?? ()
No symbol table info available.
#4  0x0000000000000707 in ?? ()
No symbol table info available.
#5  0x000000003b96c2c0 in ?? ()
No symbol table info available.
#6  0x0000000000000002 in ?? ()
No symbol table info available.
#7  0x0000000800a1f040 in ?? ()
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
#9  0x00007fffffffeccd in ?? ()
No symbol table info available.
#10 0x00007fffffffe7c0 in ?? ()
No symbol table info available.
#11 0x00000008005a83d8 in io_loop_run () from
/usr/lib/dovecot/libdovecot.so.0
No symbol table info available.
#12 0x0000000800a1a100 in ?? ()
No symbol table info available.
#13 0x00000008005a8823 in master_service_run () from
/usr/lib/dovecot/libdovecot.so.0
No symbol table info available.
#14 0x0000000800a0f840 in ?? ()
No symbol table info available.
#15 0x00000000004219d0 in main ()
No symbol table info available.


This is on FreeBSD 8.1 with the gold linker (which still can't be used
to compile pop3-login) and gcc 4.5.2.

Cheers,

Olivier

On 13.1.2011, at 20.45, interfaSys s?rl wrote:
> Hello,
> I've just updated to 2.0.9 and I've got lots of these in the logs
now.
From 2.0.8?
> Jan 13 18:57:13 master: Error: service(imap): child 40100 killed with
> signal 11 (core not dumped - set service imap { drop_priv_before_exec=yes
})
> 
> Is there a configuration change or something else I should have done
> while updating?
No.
> I tried to get some information by loading the binary into gdb and got
this:
> 
> (gdb) bt full
> #0  0x00000008007c71fc in kevent () from /lib/libc.so.7
It's difficult to guess what the problem could be without a usable gdb
backtrace, and you need a core file for that. In FreeBSD the easiest way would
probably be to enable kern.sugid_coredump sysctl.
http://dovecot.org/bugreport.html has more info.