Thread 43 "mariadbd" received signal SIGSEGV, Segmentation fault.
[Switching to LWP 11820]
st_join_table::choose_best_splitting (this=this@entry=0x7f57e01b79f0, idx=idx@entry=0, 
    remaining_tables=remaining_tables@entry=1, spl_pd_boundary=spl_pd_boundary@entry=0x7f5cacd86cd8)
    at ./sql/opt_split.cc:1047
1047    ./sql/opt_split.cc: No such file or directory.
(gdb) set print frame-arguments all
(gdb) bt full
#0  st_join_table::choose_best_splitting (this=this@entry=0x7f57e01b79f0, idx=idx@entry=0, 
    remaining_tables=remaining_tables@entry=1, spl_pd_boundary=spl_pd_boundary@entry=0x7f5cacd86cd8)
    at ./sql/opt_split.cc:1047
        pos = 0x809fe01b7e78
        last_found = 1
        spl_opt_info = 0x7f57e01778e8
        join = 0x7f57e0156e78
        thd = 0x7f57e0000c58
        tables_usable_for_splitting = 1
        keyuse_ext = 0x7f57e01cb9a0
        best_key_keyuse_ext_start = <optimized out>
        best_table = <optimized out>
        best_rec_per_key = <optimized out>
        spl_plan = 0x0
        best_key = <optimized out>
        best_key_parts = <optimized out>
        best_param_tables = <optimized out>
        trace_obj = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
        trace_arr = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d930 <vtable for Json_writer_array+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = true}, <No data fields>}
        refills = 1.7976931348623157e+308
        excluded_tables = 1
#1  0x0000556c517b2988 in best_access_path (join=0x7f57e01567e8, s=0x7f57e01b79f0, remaining_tables=1, 
    join_positions=0x7f57e01b7fc0, idx=0, disable_jbuf=true, record_count=1, pos=0x7f57e01b7fc0, 
    loose_scan_pos=0x7f5cacd86e60) at ./sql/sql_select.cc:7898
        thd = 0x7f57e0000c58
        use_cond_selectivity = 4
        best_key = 0x0
        best_max_key_part = 0
        found_constraint = 0 '\000'
        best = 1.7976931348623157e+308
        best_time = 1.7976931348623157e+308
        records = 1.7976931348623157e+308
        records_for_key = 0
        best_ref_depends_map = 0
        key_dependent = 0
        best_filter = 0x0
        tmp = <optimized out>
        keyread_tmp = 0
        rec = <optimized out>
        best_uses_jbuf = false
        eq_join_set = 0x7f57e0165120
        hj_start_key = 0x0
        spl_plan = 0x0
        spl_pd_boundary = 1
        filter = 0x0
        cause = 0x0
        best_type = JT_UNKNOWN
        type = JT_UNKNOWN
        loose_scan_opt = {try_loosescan = <optimized out>, bound_sj_equalities = 0, 
          handled_sj_equalities = <optimized out>, loose_scan_keyparts = <optimized out>, 
          max_loose_keypart = <optimized out>, part1_conds_met = <optimized out>, 
          quick_uses_applicable_index = <optimized out>, quick_max_loose_keypart = <optimized out>, 
          best_loose_scan_key = <optimized out>, best_loose_scan_cost = <optimized out>, 
          best_loose_scan_records = <optimized out>, best_loose_scan_start_key = <optimized out>, 
          best_max_loose_keypart = <optimized out>, best_ref_depend_map = <optimized out>}
        trace_wrapper = {<Json_writer_struct> = {
--Type <RET> for more, q to quit, c to continue without paging--
            _vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
        trace_paths = {<Json_writer_struct> = {_vptr.Json_writer_struct = 0x0, my_writer = 0x0, context = {
              writer = 0x556c525b4208 <vtable for Duplicate_weedout_picker+16>}, closed = 61}, <No data fields>}
        trace_access_scan = {<Json_writer_struct> = {_vptr.Json_writer_struct = 0x0, my_writer = 0xfffffffffffffe00, 
            context = {writer = 0x556c525b41c8 <vtable for Firstmatch_picker+16>}, closed = 61}, <No data fields>}
#2  0x0000556c517b671f in best_extension_by_limited_search (join=0x7f57e01567e8, remaining_tables=1, idx=0, 
    record_count=1, read_time=0, search_depth=62, prune_level=1, use_cond_selectivity=4) at ./sql/sql_select.cc:10334
        trace_one_table = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
        filter_cmp_gain = <optimized out>
        pushdown_cond_selectivity = <optimized out>
        current_record_count = 6.918698349246787e-310
        current_read_time = 6.9176798229926993e-310
        partial_join_cardinality = <optimized out>
        position = 0x7f57e01b7fc0
        loose_scan_pos = {table = 0x0, records_read = 0, cond_selectivity = 0, read_time = 0, prefix_record_count = 0, 
          key = 0x0, partial_join_cardinality = 4.6404486567798277e-310, spl_plan = 0x0, spl_pd_boundary = 0, 
          range_rowid_filter_info = 0x0, ref_depend_map = 0, key_dependent = 0, dups_producing_tables = 0, 
          inner_tables_handled_with_other_sjs = 0, dups_weedout_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b4208 <vtable for Duplicate_weedout_picker+16>}, 
            first_dupsweedout_table = 61, dupsweedout_tables = 0, is_used = false}, 
          firstmatch_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b41c8 <vtable for Firstmatch_picker+16>}, 
            first_firstmatch_table = 61, first_firstmatch_rtbl = 4222451713, firstmatch_need_tables = 140036013584720, 
            is_used = false}, loosescan_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b4188 <vtable for LooseScan_picker+16>}, 
            first_loosescan_table = 61, loosescan_need_tables = 140036013584724, loosescan_key = 2899865999, 
            loosescan_parts = 32604, is_used = false}, sjmat_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b4148 <vtable for Sj_materialization_picker+16>}, 
            is_used = false, sjm_scan_last_inner = 0, sjm_scan_need_tables = 0}, prefix_cost = {io_count = 0, 
            avg_io_cost = 1, idx_io_count = 0, idx_avg_io_cost = 1, cpu_cost = 0, idx_cpu_cost = 0, import_cost = 0, 
            mem_cost = 0, static IO_COEFF = 1, static CPU_COEFF = 1, static MEM_COEFF = 1, static IMPORT_COEFF = 1}, 
          sj_strategy = SJ_OPT_NONE, type = JT_UNKNOWN, n_sj_tables = 0, use_join_buffer = false}
        real_table_bit = 1
        thd = 0x7f57e0000c58
        s = 0x7f57e01b79f0
        pos = 0x7f57e01b7fa0
        best_record_count = 1.7976931348623157e+308
        best_read_time = 1.7976931348623157e+308
        disable_jbuf = <optimized out>
        best_res = <optimized out>
        allowed_tables = 18446744073709551615
#3  0x0000556c517b7534 in greedy_search (use_cond_selectivity=4, prune_level=1, search_depth=62, remaining_tables=1, 
    join=0x7f57e01567e8) at ./sql/sql_select.cc:9471
        is_interleave_error = <optimized out>
        pos = <optimized out>
        idx = 0
        best_idx = <optimized out>
        n_tables = 1
        record_count = 1
        read_time = 0
        size_remain = 1
        best_pos = {table = 0x0, records_read = 0, cond_selectivity = 0, read_time = 0, prefix_record_count = 0, 
          key = 0x0, partial_join_cardinality = 6.9186983492839407e-310, spl_plan = 0x0, spl_pd_boundary = 0, 
          range_rowid_filter_info = 0x0, ref_depend_map = 0, key_dependent = 0, dups_producing_tables = 0, 
          inner_tables_handled_with_other_sjs = 0, dups_weedout_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b4208 <vtable for Duplicate_weedout_picker+16>}, 
            first_dupsweedout_table = 61, dupsweedout_tables = 0, is_used = false}, 
--Type <RET> for more, q to quit, c to continue without paging--
          firstmatch_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b41c8 <vtable for Firstmatch_picker+16>}, 
            first_firstmatch_table = 61, first_firstmatch_rtbl = 0, firstmatch_need_tables = 0, is_used = false}, 
          loosescan_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b4188 <vtable for LooseScan_picker+16>}, 
            first_loosescan_table = 61, loosescan_need_tables = 0, loosescan_key = 0, loosescan_parts = 0, 
            is_used = false}, sjmat_picker = {<Semi_join_strategy_picker> = {
              _vptr.Semi_join_strategy_picker = 0x556c525b4148 <vtable for Sj_materialization_picker+16>}, 
            is_used = false, sjm_scan_last_inner = 0, sjm_scan_need_tables = 0}, prefix_cost = {io_count = 0, 
            avg_io_cost = 1, idx_io_count = 0, idx_avg_io_cost = 1, cpu_cost = 0, idx_cpu_cost = 0, import_cost = 0, 
            mem_cost = 0, static IO_COEFF = 1, static CPU_COEFF = 1, static MEM_COEFF = 1, static IMPORT_COEFF = 1}, 
          sj_strategy = SJ_OPT_NONE, type = JT_UNKNOWN, n_sj_tables = 0, use_join_buffer = false}
        best_table = <optimized out>
        record_count = <optimized out>
        read_time = <optimized out>
        idx = <optimized out>
        best_idx = <optimized out>
        size_remain = <optimized out>
        best_pos = {table = <optimized out>, records_read = <optimized out>, cond_selectivity = <optimized out>, 
          read_time = <optimized out>, prefix_record_count = <optimized out>, key = <optimized out>, 
          partial_join_cardinality = <optimized out>, spl_plan = <optimized out>, spl_pd_boundary = <optimized out>, 
          range_rowid_filter_info = <optimized out>, ref_depend_map = <optimized out>, key_dependent = <optimized out>, 
          dups_producing_tables = <optimized out>, inner_tables_handled_with_other_sjs = <optimized out>, 
          dups_weedout_picker = {<Semi_join_strategy_picker> = {_vptr.Semi_join_strategy_picker = <optimized out>}, 
            first_dupsweedout_table = <optimized out>, dupsweedout_tables = <optimized out>, is_used = <optimized out>}, 
          firstmatch_picker = {<Semi_join_strategy_picker> = {_vptr.Semi_join_strategy_picker = <optimized out>}, 
            first_firstmatch_table = <optimized out>, first_firstmatch_rtbl = <optimized out>, 
            firstmatch_need_tables = <optimized out>, is_used = <optimized out>}, 
          loosescan_picker = {<Semi_join_strategy_picker> = {_vptr.Semi_join_strategy_picker = <optimized out>}, 
            first_loosescan_table = <optimized out>, loosescan_need_tables = <optimized out>, 
            loosescan_key = <optimized out>, loosescan_parts = <optimized out>, is_used = <optimized out>}, 
          sjmat_picker = {<Semi_join_strategy_picker> = {_vptr.Semi_join_strategy_picker = <optimized out>}, 
            is_used = <optimized out>, sjm_scan_last_inner = <optimized out>, sjm_scan_need_tables = <optimized out>}, 
          prefix_cost = {io_count = <optimized out>, avg_io_cost = <optimized out>, idx_io_count = <optimized out>, 
            idx_avg_io_cost = <optimized out>, cpu_cost = <optimized out>, idx_cpu_cost = <optimized out>, 
            import_cost = <optimized out>, mem_cost = <optimized out>, static IO_COEFF = 1, static CPU_COEFF = 1, 
            static MEM_COEFF = 1, static IMPORT_COEFF = 1}, sj_strategy = <optimized out>, type = <optimized out>, 
          n_sj_tables = <optimized out>, use_join_buffer = <optimized out>}
        best_table = <optimized out>
        n_tables = <optimized out>
        is_interleave_error = <optimized out>
        pos = <optimized out>
#4  choose_plan (join=0x7f57e01567e8, join_tables=<optimized out>) at ./sql/sql_select.cc:9031
        search_depth = 62
        prune_level = 1
        use_cond_selectivity = 4
        straight_join = <optimized out>
        thd = <optimized out>
        jtab_sort_func = <optimized out>
        wrapper = {<Json_writer_struct> = {_vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, 
            my_writer = 0x0, context = {writer = 0x0}, closed = false}, <No data fields>}
        trace_plan = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d930 <vtable for Json_writer_array+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
#5  0x0000556c517e17b1 in make_join_statistics (join=0x7f57e01567e8, tables_list=
        @0x7f57e0015c88: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x7f57e015d4e0, last = 0x7f57e015d4e0, elements = 1}, <No data fields>}, keyuse_array=0x7f57e0156b08) at ./sql/sql_select.cc:5963
        records = 1
        unit = 0x7f57e00176a0
        error = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--
        error = 0
        table = <optimized out>
        i = <optimized out>
        table_count = <optimized out>
        const_count = 0
        key = <optimized out>
        found_const_table_map = 0
        all_table_map = <optimized out>
        const_ref = {static BITS_PER_ELEMENT = 64, static ARRAY_ELEMENTS = 1, 
          static ALL_BITS_SET = 18446744073709551615, buffer = {<optimized out>}}
        eq_part = {static BITS_PER_ELEMENT = 64, static ARRAY_ELEMENTS = 1, static ALL_BITS_SET = 18446744073709551615, 
          buffer = {<optimized out>}}
        has_expensive_keyparts = <optimized out>
        table_vector = 0x7f57e01b7fb0
        stat = 0x7f57e01b79f0
        stat_end = 0x7f57e01b7db8
        s = <optimized out>
        stat_ref = 0x7f57e01b7db8
        stat_vector = 0x7f57e01b7fa0
        keyuse = <optimized out>
        start_keyuse = <optimized out>
        outer_join = <optimized out>
        no_rows_const_tables = <optimized out>
        sargables = 0x7f57e0177aa8
        ti = {<base_list_iterator> = {list = 0x7f57e0015c88, el = <optimized out>, prev = <optimized out>, 
            current = <optimized out>}, <No data fields>}
        tables = <optimized out>
        thd = <optimized out>
        ref_changed = 0
#6  0x0000556c517e649c in JOIN::optimize_inner (this=0x7f57e01567e8) at ./sql/sql_select.cc:2509
        trace_wrapper = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
        trace_prepare = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
        trace_steps = {<Json_writer_struct> = {
            _vptr.Json_writer_struct = 0x556c5259d930 <vtable for Json_writer_array+16>, my_writer = 0x0, context = {
              writer = 0x0}, closed = false}, <No data fields>}
        sel = <optimized out>
        eq_list = {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x556c527a5b50 <end_of_list>, 
            last = 0x7f5cacd87660, elements = 0}, <No data fields>}
        ignore_on_expr = <optimized out>
#7  0x0000556c517e6ab0 in JOIN::optimize (this=this@entry=0x7f57e01567e8) at ./sql/sql_select.cc:1848
        res = 0
        init_state = <optimized out>
#8  0x0000556c51753868 in st_select_lex::optimize_unflattened_subqueries (this=0x7f57e0013930, 
    const_only=const_only@entry=false) at ./sql/sql_lex.cc:4925
        save_options = 2199023255552
        eq = <optimized out>
        inner_join = 0x7f57e01567e8
        save_select = 0x7f57e0013930
        res = <optimized out>
        sl = 0x7f57e0015a70
        empty_union_result = <optimized out>
        is_correlated_unit = <optimized out>
        first = false
        union_plan_saved = false
        subquery_predicate = 0x7f57e0017ec0
        un = 0x7f57e00176a0
--Type <RET> for more, q to quit, c to continue without paging--c
        next_unit = 0x0
#9  0x0000556c518d208e in JOIN::optimize_unflattened_subqueries (this=this@entry=0x7f57e011a388) at ./sql/opt_subselect.cc:5674
No locals.
#10 0x0000556c517e21da in JOIN::optimize_stage2 (this=<optimized out>) at ./sql/sql_select.cc:3334
        select_opts_for_readinfo = <optimized out>
        no_jbuf_after = <optimized out>
        tab = <optimized out>
        res = <optimized out>
#11 0x0000556c517e65ac in JOIN::optimize_inner (this=0x7f57e011a388) at ./sql/sql_select.cc:2535
        trace_wrapper = {<Json_writer_struct> = {_vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {writer = 0x0}, closed = false}, <No data fields>}
        trace_prepare = {<Json_writer_struct> = {_vptr.Json_writer_struct = 0x556c5259d910 <vtable for Json_writer_object+16>, my_writer = 0x0, context = {writer = 0x0}, closed = false}, <No data fields>}
        trace_steps = {<Json_writer_struct> = {_vptr.Json_writer_struct = 0x556c5259d930 <vtable for Json_writer_array+16>, my_writer = 0x0, context = {writer = 0x0}, closed = false}, <No data fields>}
        sel = <optimized out>
        eq_list = {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x556c527a5b50 <end_of_list>, last = 0x7f5cacd87880, elements = 0}, <No data fields>}
        ignore_on_expr = <optimized out>
#12 0x0000556c517e6ab0 in JOIN::optimize (this=this@entry=0x7f57e011a388) at ./sql/sql_select.cc:1848
        res = 0
        init_state = <optimized out>
#13 0x0000556c517e6b83 in mysql_select (thd=0x7f57e0000c58, tables=0x7f57e0021128, fields=@0x7f57e0013be8: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x7f57e0013f00, last = 0x7f57e016f790, elements = 36}, <No data fields>}, conds=0x7f57e0021940, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=<optimized out>, result=0x7f57e0119d88, unit=0x7f57e0004e08, select_lex=0x7f57e0013930) at ./sql/sql_select.cc:5055
        err = <optimized out>
        free_join = false
        join = 0x7f57e011a388
#14 0x0000556c517e765b in mysql_explain_union (thd=thd@entry=0x7f57e0000c58, unit=unit@entry=0x7f57e0004e08, result=result@entry=0x7f57e0119d88) at ./sql/sql_select.cc:28492
        res = false
        first = 0x7f57e0013930
        is_pushed_union = false
#15 0x0000556c5176d329 in execute_sqlcom_select (thd=0x7f57e0000c58, all_tables=0x7f57e0021128) at ./sql/sql_parse.cc:6212
        lex = 0x7f57e0004d40
        result = 0x7f57e0119d88
        res = <optimized out>
#16 0x0000556c5177c267 in mysql_execute_command (thd=0x7f57e0000c58, is_called_from_prepared_stmt=<optimized out>) at ./sql/sql_parse.cc:3949
        privileges_requested = <optimized out>
        multi_delete_error = <optimized out>
        wsrep_error_label = <optimized out>
        error = <optimized out>
        res = 0
        up_result = 0
        lex = 0x7f57e0004d40
        select_lex = <optimized out>
        first_table = 0x7f57e0021128
        all_tables = 0x7f57e0021128
        unit = 0x7f57e0004e08
        have_table_map_for_update = false
        rpl_filter = <optimized out>
        ots = {ctx = 0x7f57e0004a10, traceable = false}
        orig_binlog_format = BINLOG_FORMAT_MIXED
        orig_current_stmt_binlog_format = BINLOG_FORMAT_STMT
#17 0x0000556c5177d857 in mysql_parse (thd=0x7f57e0000c58, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at ./sql/sql_parse.cc:8036
        found_semicolon = <optimized out>
        error = <optimized out>
        lex = 0x7f57e0004d40
        err = <optimized out>
#18 0x0000556c5178005d in dispatch_command (command=COM_QUERY, thd=0x7f57e0000c58, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at ./sql/sql_class.h:240
        packet_end = 0x7f57e00133ed ""
        parser_state = {m_lip = {lookahead_token = -1, lookahead_yylval = 0x0, m_thd = 0x7f57e0000c58, m_ptr = 0x7f57e00133ee "\v", m_tok_start = 0x7f57e00133ee "\v", m_tok_end = 0x7f57e00133ee "\v", m_end_of_query = 0x7f57e00133ed "", m_tok_start_prev = 0x7f57e00133ed "", m_buf = 0x7f57e0012f10 "explain SELECT * FROM (SELECT CONCAT(Nachname, ', ', Vorname) AS Name , CONCAT(RIGHT(mo.month, 2), ', ', LEFT(mo.month, 4)) AS Monat , Bildungsgutscheinnummer AS Ma\237nahmennummer , CONCAT(DATE_FORMAT("..., m_buf_length = 1245, m_echo = true, m_echo_saved = false, m_cpp_buf = 0x7f57e0013450 "explain SELECT * FROM (SELECT CONCAT(Nachname, ', ', Vorname) AS Name , CONCAT(RIGHT(mo.month, 2), ', ', LEFT(mo.month, 4)) AS Monat , Bildungsgutscheinnummer AS Ma\237nahmennummer , CONCAT(DATE_FORMAT("..., m_cpp_ptr = 0x7f57e001392d "", m_cpp_tok_start = 0x7f57e001392d "", m_cpp_tok_start_prev = 0x7f57e001392d "", m_cpp_tok_end = 0x7f57e001392d "", m_body_utf8 = 0x0, m_body_utf8_ptr = 0x0, m_cpp_utf8_processed_ptr = 0x0, next_state = MY_LEX_END, found_semicolon = 0x0, ignore_space = false, stmt_prepare_mode = false, multi_statements = true, yylineno = 10, m_digest = 0x0, in_comment = NO_COMMENT, in_comment_saved = NO_COMMENT, m_cpp_text_start = 0x7f57e001392c "0", m_cpp_text_end = 0x7f57e001392d "", m_underscore_cs = 0x0}, m_yacc = {yacc_yyss = 0x0, yacc_yyvs = 0x0, m_set_signal_info = {m_item = {0x0 <repeats 12 times>}}, m_lock_type = TL_READ_DEFAULT, m_mdl_type = MDL_SHARED_READ}, m_digest_psi = 0x0}
        net = 0x7f57e0000f10
        error = false
        do_end_of_statement = true
        drop_more_results = false
        __FUNCTION__ = "dispatch_command"
        res = <optimized out>
#19 0x0000556c51781bf8 in do_command (thd=0x7f57e0000c58, blocking=blocking@entry=true) at ./sql/sql_parse.cc:1409
        return_value = <optimized out>
        packet = 0x7f57e00085a8 "\002"
        packet_length = <optimized out>
        net = 0x7f57e0000f10
        command = COM_QUERY
        __FUNCTION__ = "do_command"
#20 0x0000556c5189070f in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at ./sql/sql_connect.cc:1416
        create_user = true
        thr_create_utime = <optimized out>
        thd = 0x7f57e0000c58
#21 0x0000556c51890a5d in handle_one_connection (arg=arg@entry=0x556c53457848) at ./sql/sql_connect.cc:1318
        connect = 0x556c53457848
#22 0x0000556c51bfd4c2 in pfs_spawn_thread (arg=0x556c534578b8) at ./storage/perfschema/pfs.cc:2201
        typed_arg = 0x556c534578b8
        user_arg = 0x556c53457848
        user_start_routine = 0x556c51890a00 <handle_one_connection(void*)>
        pfs = <optimized out>
        klass = <optimized out>
#23 0x00007f5cf0372ea7 in ?? ()
No symbol table info available.
#24 0x0000000000000000 in ?? ()
No symbol table info available.