UBSAN: strings/ctype-tis620.c:613:3: runtime error: null pointer passed as argument 2, which is declared to never be null in my_strnxfrm_tis620

SET NAMES tis620;

DO CHAR((WEIGHT_STRING (EXTRACTVALUE ((0),('t')) LEVEL 7 DESC)) USING cp852);

/test/10.8_dbg_san/strings/ctype-tis620.c:613:3: runtime error: null pointer passed as argument 2, which is declared to never be null

    #0 0x55d20db82193 in my_strnxfrm_tis620 /test/10.8_dbg_san/strings/ctype-tis620.c:613

    #1 0x55d20b4df5d7 in charset_info_st::strnxfrm(char*, unsigned long, unsigned int, char const*, unsigned long, unsigned int) const /test/10.8_dbg_san/include/m_ctype.h:816

    #2 0x55d20b4df5d7 in Item_func_weight_string::val_str(String*) /test/10.8_dbg_san/sql/item_strfunc.cc:3859

    #3 0x55d20b50dc22 in Item_str_func::val_int() /test/10.8_dbg_san/sql/item_strfunc.cc:160

    #4 0x55d20b525e2c in Item_func_char::val_str(String*) /test/10.8_dbg_san/sql/item_strfunc.cc:3095

    #5 0x55d20a2c6328 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.8_dbg_san/sql/sql_type.cc:4269

    #6 0x55d20899e69b in Item::update_null_value() /test/10.8_dbg_san/sql/item.h:2055

    #7 0x55d208b00328 in Item_func::is_null() /test/10.8_dbg_san/sql/item_func.h:176

    #8 0x55d20bd2b902 in mysql_do(THD*, List<Item>&) /test/10.8_dbg_san/sql/sql_do.cc:35

    #9 0x55d20939966b in mysql_execute_command(THD*, bool) /test/10.8_dbg_san/sql/sql_parse.cc:3973

    #10 0x55d2092fb9f6 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.8_dbg_san/sql/sql_parse.cc:8028

    #11 0x55d209370fd8 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.8_dbg_san/sql/sql_parse.cc:1894

    #12 0x55d209387a3c in do_command(THD*, bool) /test/10.8_dbg_san/sql/sql_parse.cc:1402

    #13 0x55d209e424f5 in do_handle_one_connection(CONNECT*, bool) /test/10.8_dbg_san/sql/sql_connect.cc:1418

    #14 0x55d209e4538f in handle_one_connection /test/10.8_dbg_san/sql/sql_connect.cc:1312

    #15 0x55d20c331990 in pfs_spawn_thread /test/10.8_dbg_san/storage/perfschema/pfs.cc:2201

    #16 0x147aa4d65608 in start_thread /build/glibc-eX1tMB/glibc-2.31/nptl/pthread_create.c:477

    #17 0x147aa3fdb292 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x122292)

/test/10.8_opt_san/strings/ctype-tis620.c:613:3: runtime error: null pointer passed as argument 2, which is declared to never be null

    #0 0x558d8e653c6a in my_strnxfrm_tis620 /test/10.8_opt_san/strings/ctype-tis620.c:613

    #1 0x558d90dae166 in charset_info_st::strnxfrm(char*, unsigned long, unsigned int, char const*, unsigned long, unsigned int) const /test/10.8_opt_san/include/m_ctype.h:816

    #2 0x558d90dae166 in Item_func_weight_string::val_str(String*) /test/10.8_opt_san/sql/item_strfunc.cc:3859

    #3 0x558d90d94a75 in Item_str_func::val_int() /test/10.8_opt_san/sql/item_strfunc.cc:160

    #4 0x558d90dc2560 in Item_func_char::val_str(String*) /test/10.8_opt_san/sql/item_strfunc.cc:3095

    #5 0x558d8fe278b3 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.8_opt_san/sql/sql_type.cc:4269

    #6 0x558d8ea810a2 in Item_func::is_null() /test/10.8_opt_san/sql/item_func.h:176

    #7 0x558d9149d81a in mysql_do(THD*, List<Item>&) /test/10.8_opt_san/sql/sql_do.cc:35

    #8 0x558d8f19b579 in mysql_execute_command(THD*, bool) /test/10.8_opt_san/sql/sql_parse.cc:3973

    #9 0x558d8f120e28 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.8_opt_san/sql/sql_parse.cc:8028

    #10 0x558d8f176bb9 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.8_opt_san/sql/sql_parse.cc:1894

    #11 0x558d8f182412 in do_command(THD*, bool) /test/10.8_opt_san/sql/sql_parse.cc:1402

    #12 0x558d8fa4e5ed in do_handle_one_connection(CONNECT*, bool) /test/10.8_opt_san/sql/sql_connect.cc:1418

    #13 0x558d8fa510e4 in handle_one_connection /test/10.8_opt_san/sql/sql_connect.cc:1312

    #14 0x558d91ace461 in pfs_spawn_thread /test/10.8_opt_san/storage/perfschema/pfs.cc:2201

    #15 0x14f116fe0608 in start_thread /build/glibc-eX1tMB/glibc-2.31/nptl/pthread_create.c:477

    #16 0x14f116256292 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x122292)

Compiled with GCC >=7.5.0 (I use GCC 9.3.0) and:

    -DWITH_ASAN=ON -DWITH_ASAN_SCOPE=ON -DWITH_UBSAN=ON -DWITH_RAPID=OFF -DWSREP_LIB_WITH_ASAN=ON

Set before execution:

    export UBSAN_OPTIONS=print_stacktrace=1