Server crash in Item_field::print on ANALYZE FORMAT=JSON

Server version: 10.3.14-MariaDB-log

key_buffer_size=33554432

read_buffer_size=2097152

max_used_connections=18

max_threads=5010

thread_count=15

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 30832274 K bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f56400e1ae8

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 = 0x7f56e34e2dd8 thread_stack 0x49000

/usr/local/mysql/bin/mysqld(my_print_stacktrace+0x2b)[0x55b150cfa30b]

/usr/local/mysql/bin/mysqld(handle_fatal_signal+0x537)[0x55b1507e7f47]

/lib64/libpthread.so.0(+0xf5d0)[0x7f59792875d0]

/usr/local/mysql/bin/mysqld(_ZN10Item_field5printEP6String15enum_query_type+0x14)[0x55b1507ffd24]

/usr/local/mysql/bin/mysqld(_ZN19Item_func_isnotnull5printEP6String15enum_query_type+0x3d)[0x55b15081496d]

sql/item.cc:7715(Item_field::print(String*, enum_query_type))[0x55b150714166]

sql/item_cmpfunc.cc:5200(Item_func_isnotnull::print(String*, enum_query_type))[0x55b150717b36]

sql/sql_string.h:218(String::c_ptr_safe())[0x55b15071862f]

sql/sql_explain.cc:1550(Explain_table_access::print_explain_json(Explain_query*, Json_writer*, bool))[0x55b150718ae7]

sql/sql_explain.cc:1058(Explain_basic_join::print_explain_json_interns(Explain_query*, Json_writer*, bool))[0x55b150715336]

sql/sql_explain.cc:955(Explain_select::print_explain_json(Explain_query*, Json_writer*, bool))[0x55b150717f21]

sql/sql_explain.cc:1753(Explain_table_access::print_explain_json(Explain_query*, Json_writer*, bool))[0x55b15071862f]

sql/sql_explain.cc:1058(Explain_basic_join::print_explain_json_interns(Explain_query*, Json_writer*, bool))[0x55b1507189d7]

sql/sql_explain.cc:955(Explain_select::print_explain_json(Explain_query*, Json_writer*, bool))[0x55b150717f21]

sql/sql_explain.cc:1753(Explain_table_access::print_explain_json(Explain_query*, Json_writer*, bool))[0x55b15071862f]

sql/sql_explain.cc:1058(Explain_basic_join::print_explain_json_interns(Explain_query*, Json_writer*, bool))[0x55b150718ae7]

sql/sql_explain.cc:955(Explain_select::print_explain_json(Explain_query*, Json_writer*, bool))[0x55b150714a0c]

sql/sql_explain.cc:229(Explain_query::print_explain_json(select_result_sink*, bool))[0x55b150714af0]

sql/sql_explain.cc:179(Explain_query::send_explain(THD*))[0x55b1505447e1]

sql/sql_parse.cc:6560(execute_sqlcom_select(THD*, TABLE_LIST*))[0x55b15062da69]

sql/sql_parse.cc:3821(mysql_execute_command(THD*))[0x55b15062fd19]

sql/sql_class.h:1820(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x55b150631e95]

sql/sql_parse.cc:1857(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x55b15063263e]

sql/sql_parse.cc:1405(do_command(THD*))[0x55b1507331b7]

sql/threadpool_common.cc:358(threadpool_process_request)[0x55b1507be2c8]

sql/threadpool_generic.cc:1601(worker_main(void*))[0x55b15095f35d]

/lib64/libpthread.so.0(+0x7dd5)[0x7f597927fdd5]

/lib64/libc.so.6(clone+0x6d)[0x7f597815aead]