SIGSEGV in st_join_table::save_explain_data on SELECT

USE test;

SET @@SESSION.OPTIMIZER_SWITCH="index_merge_sort_union=OFF";

CREATE TABLE t (a INT, b INT, INDEX(a), INDEX(b)) ENGINE=InnoDB;

INSERT INTO t VALUES (0,0),(0,0);

SELECT * FROM t WHERE a>='2000-01-01 00:00:00' AND b='2030-01-01 00:00:00';

Core was generated by `/data/MD020420-mariadb-10.5.3-linux-x86_64-opt/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11)

    at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

[Current thread is 1 (Thread 0x7f834e992700 (LWP 31862))]

(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

#1  0x0000562fed3dcd47 in my_write_core (sig=sig@entry=11) at /data/10.5_opt/mysys/stacktrace.c:518

#2  0x0000562fecd9e87a in handle_fatal_signal (sig=11) at /data/10.5_opt/sql/signal_handler.cc:325

#3  <signal handler called>

#4  0x0000562fecbfc2c7 in st_join_table::save_explain_data (this=this@entry=0x7f831ac4b318, eta=eta@entry=0x7f831ac4c340, prefix_tables=prefix_tables@entry=0, distinct_arg=distinct_arg@entry=false, first_top_tab=first_top_tab@entry=0x7f831ac4b318) at /data/10.5_opt/sql/sql_select.cc:26518

#5  0x0000562fecbfe065 in JOIN::save_explain_data_intern (this=this@entry=0x7f831ac490f8, output=0x7f831ac49bd0, need_tmp_table_arg=<optimized out>, need_order_arg=<optimized out>, distinct_arg=distinct_arg@entry=false, message=<optimized out>) at /data/10.5_opt/sql/sql_select.cc:27072

#6  0x0000562fecbfe35a in JOIN::save_explain_data (this=this@entry=0x7f831ac490f8, output=0x7f831ac49bd0, can_overwrite=can_overwrite@entry=false, need_tmp_table=<optimized out>, need_order=<optimized out>, distinct=<optimized out>) at /data/10.5_opt/sql/sql_select.cc:4203

#7  0x0000562fecbfe433 in JOIN::build_explain (this=this@entry=0x7f831ac490f8) at /data/10.5_opt/sql/sql_select.cc:1559

#8  0x0000562fecc063f2 in JOIN::optimize (this=this@entry=0x7f831ac490f8) at /data/10.5_opt/sql/sql_select.cc:1612

#9  0x0000562fecc06551 in mysql_select (thd=thd@entry=0x7f831ac12018, tables=0x7f831ac47728, fields=..., conds=0x7f831ac486a8, og_num=<optimized out>, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f831ac490d0, unit=0x7f831ac15e60, select_lex=0x7f831ac47130) at /data/10.5_opt/sql/sql_select.cc:4654

#10 0x0000562fecc06f61 in handle_select (thd=thd@entry=0x7f831ac12018, lex=lex@entry=0x7f831ac15d98, result=result@entry=0x7f831ac490d0, setup_tables_done_option=setup_tables_done_option@entry=0) at /data/10.5_opt/sql/sql_select.cc:417

#11 0x0000562fecbad881 in execute_sqlcom_select (thd=thd@entry=0x7f831ac12018, all_tables=0x7f831ac47728) at /data/10.5_opt/sql/sql_parse.cc:6168

#12 0x0000562fecba8b23 in mysql_execute_command (thd=thd@entry=0x7f831ac12018) at /data/10.5_opt/sql/sql_parse.cc:3901

#13 0x0000562fecbb0a6c in mysql_parse (thd=thd@entry=0x7f831ac12018, rawbuf=<optimized out>, length=74, parser_state=parser_state@entry=0x7f834e9914d0, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/10.5_opt/sql/sql_parse.cc:7953

#14 0x0000562fecba58e0 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x7f831ac12018, packet=packet@entry=0x7f831ac3a019 "SELECT * FROM t WHERE a>='2000-01-01 00:00:00' AND b='2030-01-01 00:00:00'", packet_length=packet_length@entry=74, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/10.5_opt/sql/sql_parse.cc:1839

#15 0x0000562fecba3bff in do_command (thd=0x7f831ac12018) at /data/10.5_opt/sql/sql_parse.cc:1358

#16 0x0000562fecc9892e in do_handle_one_connection (connect=<optimized out>, connect@entry=0x7f834c4329b8, put_in_cache=put_in_cache@entry=true) at /data/10.5_opt/sql/sql_connect.cc:1422

#17 0x0000562fecc98ad4 in handle_one_connection (arg=arg@entry=0x7f834c4329b8) at /data/10.5_opt/sql/sql_connect.cc:1319

#18 0x0000562fed0049da in pfs_spawn_thread (arg=0x7f834c44b018) at /data/10.5_opt/storage/perfschema/pfs.cc:2201

#19 0x00007f834ddb96db in start_thread (arg=0x7f834e992700) at pthread_create.c:463

#20 0x00007f834d1b788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95