dovecot - Oct 2014 - 2.2.14 and "Panic: file virtual-sync.c"

Hi,

after upgrading to 2.2.14 (debian wheezy with apt source from rename-it.nl) I?ve
got from time to time a panic in virtual plugin. Here are an excerpt from the
log file:

----------------------------------
Oct 21 20:44:15 mailserver dovecot: imap(michael at DOMAIN): flag_change:
box=Virtual.Ungelesen, uid=1, msgid=<54466F71.3050702 at makomi.de>,
size=1661, flags=(\Seen \Draft \Recent)
Oct 21 20:44:15 mailserver dovecot: imap(michael at DOMAIN): Panic: file
virtual-sync.c: line 1115 (virtual_sync_backend_box): assertion failed:
(array_count(&bbox->sync_pending_removes) == 0)
Oct 21 20:44:15 mailserver dovecot: imap(michael at DOMAIN): Error: Raw
backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x752af) [0x7f5f2630e2af] ->
/usr/lib/dovecot/libdovecot
.so.0(+0x7530e) [0x7f5f2630e30e] ->
/usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f5f262c05de] ->
/usr/lib/dovecot/modules/lib20_virtual_plugin.so(virtual_storage_sync_init+0x266c
) [0x7f5f24abb9cc] ->
/usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x35)
[0x7f5f26601195] -> dovecot/imap(imap_sync_init+0x7a) [0x41faaa] ->
dovecot/imap(cmd_sync_dela
yed+0x190) [0x420710] -> dovecot/imap(client_handle_input+0x1d5) [0x417a35]
-> dovecot/imap(client_input+0x72) [0x417d22] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x5b) [
0x7f5f263200fb] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbb)
[0x7f5f2632117b] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9)
[0x7f5f26320189]
 -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f5f26320208] ->
/usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f5f262c5ab3] ->
dovecot/imap(main+0x2a1) [0x
40c311] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)
[0x7f5f25f2bead] -> dovecot/imap() [0x40c475]
Oct 21 20:44:15 mailserver dovecot: imap(michael at DOMAIN): Fatal: master:
service(imap): child 31075 killed with signal 6 (core dumps disabled)
?????????????????

Are the problem well-known? And what could I do?

Thanks,
Michael

On 21 Oct 2014, at 12:01, Michael K?hler <dovecot-ml at makomi.de> wrote:
> after upgrading to 2.2.14 (debian wheezy with apt source from rename-it.nl)
I?ve got from time to time a panic in virtual plugin. Here are an excerpt from
the log file:
> 
> ----------------------------------
> Oct 21 20:44:15 mailserver dovecot: imap(michael at DOMAIN): flag_change:
box=Virtual.Ungelesen, uid=1, msgid=<54466F71.3050702 at makomi.de>,
size=1661, flags=(\Seen \Draft \Recent)
> Oct 21 20:44:15 mailserver dovecot: imap(michael at DOMAIN): Panic: file
virtual-sync.c: line 1115 (virtual_sync_backend_box): assertion failed:
(array_count(&bbox->sync_pending_removes) == 0)
Fixed: http://hg.dovecot.org/dovecot-2.2/rev/37a3c6c001b7