Assertion `!str || str != Ptr' and Assertion `!str || str != Ptr || !is_alloced()' failed in String::copy

USE test;

SET collation_connection='utf16_general_ci';

SET sql_buffer_result=1;

CREATE TABLE t(c INT);

INSERT INTO t VALUES(NULL);

SELECT PASSWORD(c) FROM t;

mysqld: /test/10.5_dbg/sql/sql_string.cc:430: bool String::copy(const char*, size_t, CHARSET_INFO*, CHARSET_INFO*, uint*): Assertion `!str || str != Ptr' failed.

Core was generated by `/test/MD060620-mariadb-10.5.4-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6)

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

[Current thread is 1 (Thread 0x14b31a50c700 (LWP 220065))]

(gdb) bt

(gdb) (gdb) #0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

#1  0x0000563ecc1de00d in my_write_core (sig=sig@entry=6) at /test/10.5_dbg/mysys/stacktrace.c:518

#2  0x0000563ecb987bbc in handle_fatal_signal (sig=6) at /test/10.5_dbg/sql/signal_handler.cc:330

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51

#5  0x000014b322e65801 in __GI_abort () at abort.c:79

#6  0x000014b322e5539a in __assert_fail_base (fmt=0x14b322fdc7d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x563ecc376b71 "!str || str != Ptr", file=file@entry=0x563ecc376c60 "/test/10.5_dbg/sql/sql_string.cc", line=line@entry=430, function=function@entry=0x563ecc376fc0 <String::copy(char const*, unsigned long, charset_info_st const*, charset_info_st const*, unsigned int*)::__PRETTY_FUNCTION__> "bool String::copy(const char*, size_t, CHARSET_INFO*, CHARSET_INFO*, uint*)") at assert.c:92

#7  0x000014b322e55412 in __GI___assert_fail (assertion=assertion@entry=0x563ecc376b71 "!str || str != Ptr", file=file@entry=0x563ecc376c60 "/test/10.5_dbg/sql/sql_string.cc", line=line@entry=430, function=function@entry=0x563ecc376fc0 <String::copy(char const*, unsigned long, charset_info_st const*, charset_info_st const*, unsigned int*)::__PRETTY_FUNCTION__> "bool String::copy(const char*, size_t, CHARSET_INFO*, CHARSET_INFO*, uint*)") at assert.c:101

#8  0x0000563ecb7978ee in String::copy (this=this@entry=0x14b301474728, str=0x14b31a509f10 "`\241P\032\263\024", arg_length=0, from_cs=0x563ecced2e80 <my_charset_latin1>, to_cs=0x563eccef4dc0 <my_charset_utf16_general_ci>, errors=errors@entry=0x14b31a509ecc) at /test/10.5_dbg/sql/sql_string.cc:430

#9  0x0000563ecba57d80 in Item_func::val_str_from_val_str_ascii (this=0x14b3014746f0, str=0x14b301474728, ascii_buffer=0x14b3014747b8) at /test/10.5_dbg/sql/item_strfunc.cc:111

#10 0x0000563ecba04c0e in Item_str_ascii_func::val_str (this=<optimized out>, str=<optimized out>) at /test/10.5_dbg/sql/item_strfunc.h:88

#11 0x0000563ecb9bb5a5 in Item::save_str_in_field (this=0x14b3014746f0, field=0x14b3014566a0, no_conversions=<optimized out>) at /test/10.5_dbg/sql/item.cc:6557

#12 0x0000563ecb8afa4a in Type_handler_string_result::Item_save_in_field (this=<optimized out>, item=<optimized out>, field=<optimized out>, no_conversions=<optimized out>) at /test/10.5_dbg/sql/sql_type.cc:4184

#13 0x0000563ecb9a63b0 in Item::save_in_field (this=0x14b3014746f0, field=0x14b3014566a0, no_conversions=<optimized out>) at /test/10.5_dbg/sql/item.cc:6605

#14 0x0000563ecb6870ff in Item_result_field::save_in_result_field (this=<optimized out>, no_conversions=<optimized out>) at /test/10.5_dbg/sql/item.h:3255

#15 0x0000563ecb734cd6 in copy_funcs (func_ptr=0x14b301574420, thd=0x14b301415088) at /test/10.5_dbg/sql/sql_select.cc:25722

#16 0x0000563ecb734d8a in end_write (join=0x14b301475870, join_tab=0x14b301476e60, end_of_records=<optimized out>) at /test/10.5_dbg/sql/sql_select.cc:22057

#17 0x0000563ecb73a9bf in AGGR_OP::put_record (this=this@entry=0x14b3014776e0, end_of_records=end_of_records@entry=false) at /test/10.5_dbg/sql/sql_select.cc:28848

#18 0x0000563ecb73b06e in AGGR_OP::put_record (this=0x14b3014776e0) at /test/10.5_dbg/sql/sql_select.h:1048

#19 sub_select_postjoin_aggr (join=0x14b301475870, join_tab=0x14b301476e60, end_of_records=<optimized out>) at /test/10.5_dbg/sql/sql_select.cc:20345

#20 0x0000563ecb71bb79 in evaluate_join_record (join=join@entry=0x14b301475870, join_tab=join_tab@entry=0x14b301476ab8, error=error@entry=0) at /test/10.5_dbg/sql/sql_select.cc:20852

#21 0x0000563ecb722f35 in sub_select (join=0x14b301475870, join_tab=0x14b301476ab8, end_of_records=<optimized out>) at /test/10.5_dbg/sql/sql_select.cc:20629

#22 0x0000563ecb75bd44 in do_select (procedure=0x0, join=0x14b301475870) at /test/10.5_dbg/sql/sql_select.cc:20163

#23 JOIN::exec_inner (this=this@entry=0x14b301475870) at /test/10.5_dbg/sql/sql_select.cc:4475

#24 0x0000563ecb75c35f in JOIN::exec (this=this@entry=0x14b301475870) at /test/10.5_dbg/sql/sql_select.cc:4256

#25 0x0000563ecb75a674 in mysql_select (thd=thd@entry=0x14b301415088, tables=<optimized out>, fields=@0x14b301474288: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x14b301474810, last = 0x14b301474810, elements = 1}, <No data fields>}, conds=0x0, og_num=0, order=<optimized out>, group=0x0, having=0x0, proc_param=0x0, select_options=2147879680, result=0x14b301475848, unit=0x14b3014190a0, select_lex=0x14b301474138) at /test/10.5_dbg/sql/sql_select.cc:4680

#26 0x0000563ecb75a9a3 in handle_select (thd=thd@entry=0x14b301415088, lex=lex@entry=0x14b301418fd8, result=result@entry=0x14b301475848, setup_tables_done_option=setup_tables_done_option@entry=0) at /test/10.5_dbg/sql/sql_select.cc:417

#27 0x0000563ecb6e43a0 in execute_sqlcom_select (thd=thd@entry=0x14b301415088, all_tables=0x14b301474868) at /test/10.5_dbg/sql/sql_parse.cc:6208

#28 0x0000563ecb6dd4cc in mysql_execute_command (thd=thd@entry=0x14b301415088) at /test/10.5_dbg/sql/sql_parse.cc:3939

#29 0x0000563ecb6ea322 in mysql_parse (thd=thd@entry=0x14b301415088, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x14b31a50b350, 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:7992

#30 0x0000563ecb6d6e1c in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14b301415088, packet=packet@entry=0x14b301467089 "", packet_length=packet_length@entry=25, 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:1874

#31 0x0000563ecb6d55f6 in do_command (thd=0x14b301415088) at /test/10.5_dbg/sql/sql_parse.cc:1355

#32 0x0000563ecb8309f9 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x14b304515808, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1411

#33 0x0000563ecb831115 in handle_one_connection (arg=arg@entry=0x14b304515808) at /test/10.5_dbg/sql/sql_connect.cc:1313

#34 0x0000563ecbc90104 in pfs_spawn_thread (arg=0x14b321845888) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201

#35 0x000014b323b486db in start_thread (arg=0x14b31a50c700) at pthread_create.c:463

#36 0x000014b322f4688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95