UBSAN negation of -X cannot be represented in type 'long long int'; cast to an unsigned type to negate this value to itself in my_strntoll_mb2_or_mb4

SET character_set_connection=utf32;

SELECT CONV('-AzL8n0Y58m8', -62, -10);

/test/server_opt_san/strings/ctype-ucs2.c:519:39: runtime error: negation of -9223372036854775808 cannot be represented in type 'long long int'; cast to an unsigned type to negate this value to itself

    #0 0x55be28531ecf in my_strntoll_mb2_or_mb4 /test/server_opt_san/strings/ctype-ucs2.c:519

    #1 0x55be2646629c in charset_info_st::strntoll(char const*, unsigned long, int, char**, int*) const /test/server_opt_san/include/m_ctype.h:919

    #2 0x55be2646629c in Item_func_conv::val_str(String*) /test/server_opt_san/sql/item_strfunc.cc:3952

    #3 0x55be2553753d in Type_handler::Item_send_str(Item*, Protocol*, st_value*) const /test/server_opt_san/sql/sql_type.cc:7496

    #4 0x55be23fa0ec1 in Protocol::send_result_set_row(List<Item>*) /test/server_opt_san/sql/protocol.cc:1333

    #5 0x55be24299fd9 in select_send::send_data(List<Item>&) /test/server_opt_san/sql/sql_class.cc:3187

    #6 0x55be24a48544 in select_result_sink::send_data_with_check(List<Item>&, st_select_lex_unit*, unsigned long long) /test/server_opt_san/sql/sql_class.h:5995

    #7 0x55be24a48544 in select_result_sink::send_data_with_check(List<Item>&, st_select_lex_unit*, unsigned long long) /test/server_opt_san/sql/sql_class.h:5985

    #8 0x55be24a48544 in JOIN::exec_inner() /test/server_opt_san/sql/sql_select.cc:4862

    #9 0x55be24a4cc29 in JOIN::exec() /test/server_opt_san/sql/sql_select.cc:4774

    #10 0x55be24a3a10c in mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) /test/server_opt_san/sql/sql_select.cc:5304

    #11 0x55be24a3dda3 in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/server_opt_san/sql/sql_select.cc:630

    #12 0x55be24609def in execute_sqlcom_select /test/server_opt_san/sql/sql_parse.cc:6094

    #13 0x55be24659bf5 in mysql_execute_command(THD*, bool) /test/server_opt_san/sql/sql_parse.cc:3943

    #14 0x55be245da1d0 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/server_opt_san/sql/sql_parse.cc:7815

    #15 0x55be2462fb00 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/server_opt_san/sql/sql_parse.cc:1893

    #16 0x55be2463b79d in do_command(THD*, bool) /test/server_opt_san/sql/sql_parse.cc:1406

    #17 0x55be24fa01bd in do_handle_one_connection(CONNECT*, bool) /test/server_opt_san/sql/sql_connect.cc:1437

    #18 0x55be24fa282c in handle_one_connection /test/server_opt_san/sql/sql_connect.cc:1339

    #19 0x14a5abbac608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477

    #20 0x14a5aae21132 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x11f132)