SIGSEGV in TABLE_LIST::print on SHOW FUNCTION CODE *and* Assertion `s' failed in TABLE::versioned on SHOW FUNCTION CODE

USE test;

SET SQL_MODE='';

CREATE FUNCTION f(z INT) RETURNS INT READS SQL DATA RETURN (SELECT x FROM t WHERE x = z);

CREATE TEMPORARY TABLE t (c INT) ENGINE=InnoDB;

SELECT f('a');

DROP TEMPORARY TABLES t;

SHOW FUNCTION CODE f;

Core was generated by `/test/MD140720-mariadb-10.5.5-linux-x86_64-dbg/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 0x153fb7541700 (LWP 1691430))]

(gdb) bt

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

#1  0x000056063413d4d7 in my_write_core (sig=sig@entry=11) at /test/10.5_dbg/mysys/stacktrace.c:518

#2  0x00005606338f79ba in handle_fatal_signal (sig=11) at /test/10.5_dbg/sql/signal_handler.cc:330

#3  <signal handler called>

#4  TABLE_LIST::print (this=0x153f92c90568, thd=thd@entry=0x153f92c15088, eliminated_tables=eliminated_tables@entry=0, str=str@entry=0x153fb753f2a0, query_type=query_type@entry=QT_ITEM_ORIGINAL_FUNC_NULLIF) at /test/10.5_dbg/sql/sql_select.cc:27553

#5  0x00005606336a8876 in print_table_array (query_type=QT_ITEM_ORIGINAL_FUNC_NULLIF, end=0x153f92c742e8, table=0x153f92c742e0, str=0x153fb753f2a0, eliminated_tables=0, thd=0x153f92c15088) at /test/10.5_dbg/sql/sql_select.cc:27243

#6  print_join (thd=thd@entry=0x153f92c15088, eliminated_tables=0, str=str@entry=0x153fb753f2a0, tables=0x153f92c90130, query_type=query_type@entry=QT_ITEM_ORIGINAL_FUNC_NULLIF) at /test/10.5_dbg/sql/sql_select.cc:27399

#7  0x00005606336a8e23 in st_select_lex::print (this=0x153f92c8ff68, thd=thd@entry=0x153f92c15088, str=str@entry=0x153fb753f2a0, query_type=query_type@entry=QT_ITEM_ORIGINAL_FUNC_NULLIF) at /test/10.5_dbg/sql/sql_select.cc:27699

#8  0x00005606339e4696 in subselect_single_select_engine::print (this=0x153f92c91030, str=0x153fb753f2a0, query_type=QT_ITEM_ORIGINAL_FUNC_NULLIF) at /test/10.5_dbg/sql/item_subselect.cc:4478

#9  0x00005606339e4c03 in Item_subselect::print (this=0x153f92c90e88, str=0x153fb753f2a0, query_type=QT_ITEM_ORIGINAL_FUNC_NULLIF) at /test/10.5_dbg/sql/item_subselect.cc:1038

#10 0x000056063357fd83 in sp_instr_freturn::print (this=0x153f92c8dea0, str=0x153fb753f2a0) at /test/10.5_dbg/sql/sp_head.cc:4203

#11 0x000056063358a50e in sp_head::show_routine_code (this=0x153f92c8f0a0, thd=thd@entry=0x153f92c15088) at /test/10.5_dbg/sql/sp_head.cc:3385

#12 0x00005606336505e5 in mysql_execute_command (thd=thd@entry=0x153f92c15088) at /test/10.5_dbg/sql/sql_parse.cc:5728

#13 0x0000560633658752 in mysql_parse (thd=thd@entry=0x153f92c15088, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x153fb7540350, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:7993

#14 0x0000560633645204 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x153f92c15088, packet=packet@entry=0x153f92c67089 "", packet_length=packet_length@entry=20, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:1866

#15 0x00005606336439de in do_command (thd=0x153f92c15088) at /test/10.5_dbg/sql/sql_parse.cc:1347

#16 0x000056063379fc3b in do_handle_one_connection (connect=<optimized out>, connect@entry=0x153f964c7808, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1411

#17 0x00005606337a0357 in handle_one_connection (arg=arg@entry=0x153f964c7808) at /test/10.5_dbg/sql/sql_connect.cc:1313

#18 0x0000560633c03ca8 in pfs_spawn_thread (arg=0x153fb4446508) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201

#19 0x0000153fb64ba6db in start_thread (arg=0x153fb7541700) at pthread_create.c:463

#20 0x0000153fb58b8a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95