#0  0x00007f75824f053f in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f75824da895 in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007f75826e156f in default_fatal_finish (status=0, type=LOG_TYPE_PANIC) at failures.c:460
        backtrace = 0x5600067a03a0 "/usr/lib64/dovecot/libdovecot.so.0(+0xe34fb) [0x7f75827734fb] -> /usr/lib64/dovecot/libdovecot.so.0(+0xe3597) [0x7f7582773597] -> /usr/lib64/dovecot/libdovecot.so.0(+0x51207) [0x7f75826e1207] -> /usr/"...
        backtrace = <optimized out>
        recursed = 0
#3  fatal_handler_real (ctx=<optimized out>, format=<optimized out>, args=<optimized out>) at failures.c:472
        status = 0
#4  0x00007f7582773597 in i_internal_fatal_handler (ctx=<optimized out>, format=<optimized out>, args=<optimized out>) at failures.c:849
No locals.
#5  0x00007f75826e1207 in i_panic (format=format@entry=0x7f75827ae0d8 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:524
        ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0, timestamp_usecs = 0, log_prefix = 0x0, log_prefix_type_pos = 0}
        args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fff6be37600, reg_save_area = 0x7fff6be37540}}
#6  0x00007f75826deeef in o_stream_dot_sendv (stream=0x560006904040, iov=0x7fff6be37710, iov_count=1) at ostream-dot.c:208
        iov_new = <optimized out>
        sent = <optimized out>
        count = <optimized out>
        i = <optimized out>
        ret = <optimized out>
        dstream = <optimized out>
        iov_arr = {arr = {buffer = 0x56000679c318, element_size = 16}, v = 0x56000679c318, v_modifiable = 0x56000679c318}
        max_bytes = <optimized out>
        added = <optimized out>
        iov = 0x7fff6be37710
        iov_new = <optimized out>
        sent = <optimized out>
        __func__ = "o_stream_dot_sendv"
        size = <optimized out>
        p = <optimized out>
        iov_count = 1
        stream = 0x560006904040
        max_bytes = <optimized out>
        pend = <optimized out>
        iovn = <optimized out>
        added = <optimized out>
        dstream = <optimized out>
        i = <optimized out>
        ret = <optimized out>
        data = <optimized out>
        add = <optimized out>
        iov_arr = <optimized out>
        count = <optimized out>
        chunk = <optimized out>
        dstream = 0x560006904040
        iov_arr = <optimized out>
        iov_new = <optimized out>
        max_bytes = <optimized out>
        sent = <optimized out>
        added = <optimized out>
        count = <optimized out>
        i = <optimized out>
        ret = <optimized out>
        __func__ = "o_stream_dot_sendv"
        size = <optimized out>
        chunk = <optimized out>
        data = <optimized out>
        p = <optimized out>
        pend = <optimized out>
        iovn = <optimized out>
        add = <optimized out>
#7  0x00007f7582797cf8 in o_stream_sendv_int (stream=0x5600069040e0, iov=<optimized out>, iov_count=<optimized out>, overflow_r=0x7fff6be376e7) at ostream.c:276
        _stream = <optimized out>
        i = <optimized out>
        total_size = 62459
        ret = <optimized out>
        __func__ = "o_stream_sendv_int"
#8  0x00007f75827982c2 in o_stream_sendv (stream=<optimized out>, iov=<optimized out>, iov_count=<optimized out>) at ostream.c:301
        overflow = false
#9  0x00007f7582798b6a in io_stream_copy (outstream=0x5600069040e0, instream=0x560006903eb0) at ostream.c:487
        iov = {iov_base = 0x7f75820baf64, iov_len = 62459}
        data = 0x7f75820baf64 "3mQIn [role=3Dbutton], ._3mQI=\r\nn [type=3Dbutton], ._3mQIn [type=3Dsubmit]=0A=\r\n\t{line-height:initial;=0A=\r\n\twhite-space:normal;=0A=\r\n\ttext-align:left;=0A=\r\n\tfloat:initial;=0A=\r\n\tclear:none;=0A=\r\n\tver"...
        ret = <optimized out>
#10 0x00007f7582798873 in o_stream_send_istream (outstream=outstream@entry=0x5600069040e0, instream=instream@entry=0x560006903eb0) at ostream.c:395
        _outstream = <optimized out>
        old_outstream_offset = <optimized out>
        old_instream_offset = <optimized out>
        res = <optimized out>
        __func__ = "o_stream_send_istream"
#11 0x00007f75826f0805 in smtp_client_command_send_stream (cmd=<optimized out>) at smtp-client-command.c:468
        conn = 0x560006800d08
        stream = 0x560006903eb0
        ret = <optimized out>
        output = 0x5600069040e0
        res = <optimized out>
        conn = <optimized out>
        stream = <optimized out>
        output = <optimized out>
        res = <optimized out>
        ret = <optimized out>
        __func__ = "smtp_client_command_send_stream"
#12 smtp_client_command_send_more (conn=0x560006800d08) at smtp-client-command.c:590
        cmd = 0x560006900a28
        data = <optimized out>
        size = <optimized out>
        sent = <optimized out>
        ret = <optimized out>
        __func__ = "smtp_client_command_send_more"
#13 0x00007f75826f60dd in smtp_client_connection_output (conn=<optimized out>) at smtp-client-connection.c:1085
        ret = 1
#14 0x00007f75824aa7e1 in plain_flush_callback (sstream=0x5600068cc150) at ostream-openssl.c:197
        ostream = 0x5600068cc1f0
        ret = 1
        ret2 = <optimized out>
#15 0x00007f758279a558 in stream_send_io (fstream=0x5600067ffa70) at ostream-file.c:482
        ostream = 0x5600067ffb10
        iostream = 0x5600067ffa70
        use_cork = true
        ret = <optimized out>
#16 0x00007f758278a203 in io_loop_call_io (io=0x56000690e9c0) at ioloop.c:698
        ioloop = 0x5600067a2f00
        t_id = 2
        __func__ = "io_loop_call_io"
#17 0x00007f758278b8b6 in io_loop_handler_run_internal (ioloop=ioloop@entry=0x5600067a2f00) at ioloop-epoll.c:221
        ctx = 0x5600067ac120
        events = <optimized out>
        event = 0x5600067ac190
        list = 0x56000680d4f0
        io = <optimized out>
        tv = {tv_sec = 124, tv_usec = 998210}
        events_count = <optimized out>
        msecs = <optimized out>
        ret = <optimized out>
        i = 0
        j = <optimized out>
        call = <optimized out>
        __func__ = "io_loop_handler_run_internal"
#18 0x00007f758278a2b0 in io_loop_handler_run (ioloop=0x5600067a2f00) at ioloop.c:750
        __func__ = "io_loop_handler_run"
#19 0x00007f758278a418 in io_loop_run (ioloop=0x5600067a2f00) at ioloop.c:723
        __func__ = "io_loop_run"
#20 0x00007f75827095a7 in master_service_run (service=0x5600067a2d90, callback=callback@entry=0x560005e7d080 <client_connected>) at master-service.c:775
No locals.
#21 0x0000560005e7cea5 in main (argc=<optimized out>, argv=<optimized out>) at main.c:158
        set_roots = {0x560005e846e0 <smtp_submit_setting_parser_info>, 0x560005e84680 <lda_setting_parser_info>, 0x560005e84440 <lmtp_setting_parser_info>, 0x0}
        service_flags = <optimized out>
        storage_service_flags = (MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP | MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP | MAIL_STORAGE_SERVICE_FLAG_NO_LOG_INIT | MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT)
        tmp_base_dir = 0x56000679a288 " \\\202\202u\177"
        c = <optimized out>
        error = 0x7f75829dc718 "\360Ɲ\202u\177"