main.brackets test crashes with --ps-protocol and enabled trace

./mtr --mysqld=--optimizer_trace=enabled=on main/brackets.test  --ps-protocol

Thread pointer: 0x7f0ed8000d78

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

stack_bottom = 0x7f0eef49ec98 thread_stack 0x49000

mysys/stacktrace.c:215(my_print_stacktrace)[0x55dee3cbde75]

sql/signal_handler.cc:241(handle_fatal_signal)[0x55dee33de936]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f0ef9879980]

sql/sql_select.cc:29422(st_select_lex::print(THD*, String*, enum_query_type))[0x55dee30ddf93]

sql/sql_lex.cc:3700(st_select_lex_unit::print(String*, enum_query_type))[0x55dee3007a25]

sql/sql_cte.cc:1683(With_element::print(THD*, String*, enum_query_type))[0x55dee32f3d5f]

sql/sql_cte.cc:1634(With_clause::print(THD*, String*, enum_query_type))[0x55dee32f3bf1]

sql/item_subselect.cc:4604(subselect_single_select_engine::print(String*, enum_query_type))[0x55dee34e0a53]

sql/item_subselect.cc:1075(Item_subselect::print(String*, enum_query_type))[0x55dee34d2c6b]

sql/item.cc:498(Item::print_parenthesised(String*, enum_query_type, precedence))[0x55dee340298b]

sql/item_func.cc:643(Item_func::print_op(String*, enum_query_type))[0x55dee346dd75]

sql/item_func.h:1118(Item_num_op::print(String*, enum_query_type))[0x55dee3023c3d]

sql/item.cc:498(Item::print_parenthesised(String*, enum_query_type, precedence))[0x55dee340298b]

sql/item_func.cc:643(Item_func::print_op(String*, enum_query_type))[0x55dee346dd75]

sql/item_func.h:1118(Item_num_op::print(String*, enum_query_type))[0x55dee3023c3d]

sql/item.cc:513(Item::print_item_w_name(String*, enum_query_type))[0x55dee3402a24]

sql/sql_select.cc:29105(st_select_lex::print_item_list(THD*, String*, enum_query_type))[0x55dee30dcf57]

sql/sql_select.cc:29316(st_select_lex::print(THD*, String*, enum_query_type))[0x55dee30dda98]

sql/opt_trace.cc:123(opt_trace_print_expanded_query(THD*, st_select_lex*, Json_writer_object*))[0x55dee330310c]

sql/sql_select.cc:1739(JOIN::prepare(TABLE_LIST*, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*))[0x55dee308de95]

sql/sql_select.cc:5068(mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x55dee309a3d6]

sql/sql_select.cc:559(handle_select(THD*, LEX*, select_result*, unsigned long))[0x55dee30890df]

sql/sql_parse.cc:6285(execute_sqlcom_select(THD*, TABLE_LIST*))[0x55dee304868c]

sql/sql_parse.cc:3961(mysql_execute_command(THD*, bool))[0x55dee303f725]

sql/sql_prepare.cc:5249(Prepared_statement::execute(String*, bool))[0x55dee306fb45]

sql/sql_prepare.cc:4655(Prepared_statement::execute_loop(String*, bool, unsigned char*, unsigned char*))[0x55dee306dd5e]

sql/sql_prepare.cc:3584(mysql_stmt_execute_common(THD*, unsigned long, unsigned char*, unsigned char*, unsigned long, bool, bool))[0x55dee306b0e2]

Query (0x7f0ed812cdd8): select

( with t as (select * from t1 where a <=3)

select a from t limit 1 ) + t2.b + (values (100)) as r

from t2

  void st_select_lex::print(THD *thd, String *str, enum_query_type query_type)

    if (join)

      cur_having= join->having;

    if (cur_having || having_value != Item::COND_UNDEF)

    { 

      str->append(STRING_WITH_LEN(" having "));

      if (cur_having)

=>      cur_having->print(str, query_type); 

      else

        str->append(having_value != Item::COND_FALSE ? '1' : '0');

    }

(gdb) print cur_having

  $86 = (Item *) 0xa5a5a5a5a5a5a5a5

(gdb) p having

  $88 = (Item *) 0x0

(gdb) p join->having

  $90 = (Item *) 0xa5a5a5a5a5a5a5a5