#0  event_unref (_event=_event@entry=0x781e3b828918) at lib-event.c:217
        event = 0x1400
        __func__ = "event_unref"
#1  0x000000ccbcdb0151 in driver_sqlite_exec (_db=0xccf6c3d438, query=0xccbcdb2fcd "BEGIN TRANSACTION") at driver-sqlite.c:186
        db = 0xccf6c3d438
        result = {v = {free = 0x0, next_row = 0x0, get_fields_count = 0x0, get_field_name = 0x0, find_field = 0x0, get_field_value = 0x0, get_field_value_binary = 0x0, find_field_value = 0x0, get_values = 0x0, get_error = 0x0, 
            more = 0x0}, refcount = 0, db = 0xccf6c3d438, fields = 0x0, map_size = 0, map = 0x0, fetch_dest = 0x0, event = 0xccf6c3e000, fetch_dest_size = 0, error_type = SQL_RESULT_ERROR_TYPE_UNKNOWN, failed = false, 
          failed_try_retry = false, callback = false}
        event = 0x1400
#2  0x000000ccbcdaf333 in driver_sqlite_transaction_begin (_db=0xccf6c3d438) at driver-sqlite.c:373
        ctx = 0xccf6c3db80
        db = 0xccf6c3d438
#3  0x000000ccbcda314d in sql_dict_transaction_init (_dict=0xccf6c3bf08) at dict-sql.c:913
        dict = 0xccf6c3bf08
        ctx = 0xccf6c3dae0
#4  0x0000604dd068f6f2 in dict_transaction_begin (dict=<optimized out>) at dict.c:234
        ctx = <optimized out>
#5  0x000000ccbcda1b06 in cmd_begin (cmd=0xccf6c3d9e0, line=<optimized out>) at dict-commands.c:371
        trans = 0xccf6c3da70
        id = 1
#6  0x000000ccbcda25ff in dict_command_input (conn=conn@entry=0xccf6c37a10, line=line@entry=0xccf6c39e79 "B1") at dict-commands.c:618
        cmd_func = <optimized out>
        cmd = 0xccf6c3d9e0
        ret = <optimized out>
#7  0x000000ccbcda0a31 in dict_connection_input_more (conn=0xccf6c37a10) at dict-connection.c:120
        _data_stack_cur_id = 3
        line = 0xccf6c39e79 "B1"
        ret = <optimized out>
#8  0x000000ccbcda0b35 in dict_connection_input (conn=0xccf6c37a10) at dict-connection.c:169
        line = <optimized out>
        line = <optimized out>
#9  dict_connection_input (conn=0xccf6c37a10) at dict-connection.c:134
        line = <optimized out>
#10 0x0000604dd06e4cfd in io_loop_call_io (io=0xccf6c37e30) at ioloop.c:698
        ioloop = 0xccf6c28d70
        t_id = 2
        __func__ = "io_loop_call_io"
#11 0x0000604dd06e6635 in io_loop_handler_run_internal (ioloop=ioloop@entry=0xccf6c28d70) at ioloop-epoll.c:221
        ctx = 0xccf6c2a910
        events = <optimized out>
        event = 0xccf6c2a980
        list = 0xccf6c37e90
        io = <optimized out>
        tv = {tv_sec = 2147483, tv_usec = 0}
        events_count = <optimized out>
        msecs = <optimized out>
        ret = <optimized out>
        i = 0
        j = <optimized out>
        call = <optimized out>
        __func__ = "io_loop_handler_run_internal"
#12 0x0000604dd06e4dc7 in io_loop_handler_run (ioloop=0xccf6c28d70) at ioloop.c:750
        __func__ = "io_loop_handler_run"
#13 0x0000604dd06e4f68 in io_loop_run (ioloop=0xccf6c28d70) at ioloop.c:723
        __func__ = "io_loop_run"
#14 0x0000604dd065536a in master_service_run (service=0xccf6c28c00, callback=callback@entry=0xccbcda2970 <client_connected>) at master-service.c:781
No locals.
#15 0x000000ccbcda0300 in main (argc=<optimized out>, argv=<optimized out>) at main.c:153
        set_roots = {0xccbcdb9cc0 <dict_setting_parser_info>, 0x0}
        error = 0x781e3b828cf6 ""
quit