Crash on st_join_table::save_explain_data

stack_bottom = 0x7f982069adb0 thread_stack 0x49000

mysys/stacktrace.c:213(my_print_stacktrace)[0x55972f6abc1e]

sql/signal_handler.cc:224(handle_fatal_signal)[0x55972f088aa7]

sigaction.c:0(__restore_rt)[0x7f98364b73c0]

sql/sql_select.cc:26822(st_join_table::save_explain_data(Explain_table_access*, unsigned long long, bool, st_join_table*))[0x55972eecb64f]

sql/sql_select.cc:27378(JOIN::save_explain_data_intern(Explain_query*, bool, bool, bool, char const*))[0x55972eecd18b]

sql/sql_select.cc:4256(JOIN::save_explain_data(Explain_query*, bool, bool, bool, bool))[0x55972eecd2f0]

sql/sql_select.cc:1617(JOIN::build_explain())[0x55972eecd54c]

sql/sql_select.cc:1674(JOIN::optimize())[0x55972eee2091]

sql/sql_select.cc:4758(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*))[0x55972eee2198]

sql/sql_select.cc:27511(mysql_explain_union(THD*, st_select_lex_unit*, select_result*))[0x55972eee2ff2]

sql/sql_parse.cc:6256(execute_sqlcom_select(THD*, TABLE_LIST*))[0x55972ed45807]

sql/sql_parse.cc:4005(mysql_execute_command(THD*))[0x55972ee87fce]

sql/sql_parse.cc:8100(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x55972ee8a35c]

sql/sql_parse.cc:1951(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x55972ee8cd5a]

sql/sql_parse.cc:1375(do_command(THD*))[0x55972ee8e07f]

sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x55972ef797e2]

sql/sql_connect.cc:1318(handle_one_connection)[0x55972ef79ab4]

perfschema/pfs.cc:2204(pfs_spawn_thread)[0x55972f30087d]

nptl/pthread_create.c:478(start_thread)[0x7f98364ab609]

??:0(clone)[0x7f9836099293]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7f97a4012940): EXPLAIN SELECT COUNT(*) FROM mycrash WHERE (((p = 'foo' AND er != 4) OR er = 4 )) AND ((es >= 4)) limit 1

$ dbdeployer deploy single 10.6.4

$ msb_10_6_4/use test < mycrash_1.sql

$ msb_10_6_4/use test 

mysql [localhost:10604] {msandbox} (test) > SELECT COUNT(*) FROM mycrash WHERE (((p = 'foo' AND er != 4) OR er = 4 )) AND ((es >= 4)) limit 1;

ERROR 2013 (HY000): Lost connection to server during query