gistfile1.txt

what could this be?

Nov 25 16:02:41 imap-login: Info: Login: user=<pub.eltarf@xxx>, method=PLAIN, rip=10.10.10.19, lip=10.10.10.19, lport=143, service=imap
Nov 25 16:02:41 imap(pub.eltarf@xxx): Panic: file mail-index-sync-keywords.c: line 227 (keywords_update_records): assertion failed: (data_offset >= sizeof(struct mail_index_record))
Nov 25 16:02:41 imap(pub.eltarf@xxx): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x6c7ee) [0x7f1430b917ee] -> /usr/lib/dovecot/libdovecot.so.0(+0x6c8dc) [0x7f1430b918dc] -> /usr/lib/dovecot/libdovecot.so.0(i_fata
l+0) [0x7f1430b47b6b] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_keywords+0x828) [0x7f1430ecd058] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_record+0xf7) [0x7f1430ecd907] -> /usr/lib/dovecot/libdovecot-sto
rage.so.0(mail_index_sync_map+0x238) [0x7f1430ece8b8] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_map+0x21f) [0x7f1430ebef2f] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xba7dd) [0x7f1430eba7dd] -> /usr/lib/dovecot/libdovecot-
storage.so.0(+0xbae3b) [0x7f1430ebae3b] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_open+0x8c) [0x7f1430ebaf4c] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_mailbox_open+0xff) [0x7f1430eabcef] -> /usr/lib/dovecot/li
bdovecot-storage.so.0(+0x4def2) [0x7f1430e4def2] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x4dfd8) [0x7f1430e4dfd8] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x813c4) [0x7f1430e813c4] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail
box_open+0x20) [0x7f1430e81540] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_get_status+0x20) [0x7f1430eaade0] -> /usr/lib/dovecot/modules/lib10_quota_plugin.so(+0xbfcd) [0x7f142ff54fcd] -> /usr/lib/dovecot/modules/lib01_acl_p
lugin.so(+0xe3e5) [0x7f143036f3e5] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x31) [0x7f1430e818a1] -> dovecot/imap(imap_status_get+0x77) [0x7f1431363fa7] -> dovecot/imap(cmd_status+0x1a9) [0x7f1431358b79] -> dovecot/i
map(command_exec+0x3c) [0x7f143135d09c] -> dovecot/imap(+0x17fb2) [0x7f143135bfb2] -> dovecot/imap(+0x18066) [0x7f143135c066] -> dovecot/imap(client_handle_input+0x13d) [0x7f143135c39d] -> dovecot/imap(client_input+0x85) [0x7f143135c745] -
> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x3f) [0x7f1430ba2dff] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xf9) [0x7f1430ba3df9]
Nov 25 16:02:41 imap(pub.eltarf@xxx): Fatal: master: service(imap): child 27694 killed with signal 6 (core dumps disabled)