SIGSEGV in Item::val_uint on EXPLAIN, UBSAN: member call on null pointer of type 'struct Item' in handle_select

USE test;

SET GLOBAL GENERAL_LOG=ON;

SET GLOBAL log_output="FILE,TABLE";

CREATE TABLE t(a DATE);

EXPLAIN SELECT * FROM t LIMIT ROWS EXAMINED 0;

SELECT 1;

Core was generated by `/test/MD010520-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 0x7f8d71970700 (LWP 1539686))]

(gdb) bt

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

#1  0x000055c976d84ac7 in my_write_core (sig=sig@entry=11) at /test/10.5_opt/mysys/stacktrace.c:518

#2  0x000055c9767467ca in handle_fatal_signal (sig=11) at /test/10.5_opt/sql/signal_handler.cc:329

#3  <signal handler called>

#4  Item::val_uint (this=0x0) at /test/10.5_opt/sql/item.h:1282

#5  handle_select (thd=thd@entry=0x7f8d3d812018, lex=lex@entry=0x7f8d3d815da0, result=result@entry=0x7f8d3d847eb8, setup_tables_done_option=setup_tables_done_option@entry=0) at /test/10.5_opt/sql/sql_select.cc:442

#6  0x000055c976555171 in execute_sqlcom_select (thd=thd@entry=0x7f8d3d812018, all_tables=0x0) at /test/10.5_opt/sql/sql_parse.cc:6172

#7  0x000055c976551092 in mysql_execute_command (thd=thd@entry=0x7f8d3d812018) at /test/10.5_opt/sql/sql_parse.cc:3901

#8  0x000055c97655822c in mysql_parse (thd=0x7f8d3d812018, rawbuf=<optimized out>, length=8, parser_state=0x7f8d7196f4d0, is_com_multi=<optimized out>, is_next_command=<optimized out>) at /test/10.5_opt/sql/sql_parse.cc:7957

#9  0x000055c97654d855 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x7f8d3d812018, packet=packet@entry=0x7f8d3d83a019 "", packet_length=packet_length@entry=8, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_opt/sql/sql_parse.cc:1839

#10 0x000055c97654bae6 in do_command (thd=0x7f8d3d812018) at /test/10.5_opt/sql/sql_parse.cc:1358

#11 0x000055c97664029e in do_handle_one_connection (connect=<optimized out>, connect@entry=0x7f8d6f4329b8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1422

#12 0x000055c976640444 in handle_one_connection (arg=arg@entry=0x7f8d6f4329b8) at /test/10.5_opt/sql/sql_connect.cc:1319

#13 0x000055c9769ac53a in pfs_spawn_thread (arg=0x7f8d6f44b018) at /test/10.5_opt/storage/perfschema/pfs.cc:2201

#14 0x00007f8d70d976db in start_thread (arg=0x7f8d71970700) at pthread_create.c:463

#15 0x00007f8d7019588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95