May 25 20:59:15 server dovecot: dsync-server(user): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x67f30) [0x7f8c41cd0f30] -> /usr/lib/dovecot/libdovecot.so.0(+0x6800e) [0x7f8c41cd100e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f8c41c84515] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0x2ad6a) [0x7f8c424a1d6a] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](dsync_mailbox_trees_sync_init+0x15c) [0x7f8c424a329c] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](dsync_brain_recv_mailbox_tree_deletes+0x1e8) [0x7f8c42497608] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](dsync_brain_run+0x48b) [0x7f8c424942cb] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0x1d680) [0x7f8c42494680] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0x3037f) [0x7f8c424a737f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x4c) [0x7f8c41ce265c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbb) [0x7f8c41ce35ab] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x7f8c41ce26c9] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f8c41ce2748] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0x108b8) [0x7f8c424878b8] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0x11dbb) [0x7f8c42488dbb] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0x1bd7f) [0x7f8c42492d7f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x4c) [0x7f8c41ce265c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbb) [0x7f8c41ce35ab] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x7f8c41ce26c9] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f8c41ce2748] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f8c41c89843] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](main+0x11b) [0x7f8c42485f3b] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f8c418c5ec5] -> dovecot/doveadm-server [192.168.0.1 user recv_mailbox_tree_deletes](+0xefa7) [0x7f8c42485fa7]

May 25 20:59:15 server dovecot: dsync-server(user): Fatal: master: service(doveadm): child 83257 killed with signal 6 (core dumps disabled)