UBSAN: downcast of address X which does not point to an object of type 'Field_num' in field_longlong::get_opt_type | sql/sql_analyse.cc

CREATE TABLE t (c BIT(10));

INSERT INTO t VALUES ('a');

SELECT * FROM t PROCEDURE ANALYSE(2);

/test/mtest/MDEV-31606/11.3_opt_san/sql/sql_analyse.cc:968:51: runtime error: member access within address 0x619000093900 which does not point to an object of type 'Field_num'

0x619000093900: note: object is of type 'Field_bit_as_char'

 be be be be  f8 bd 58 85 96 55 00 00  c9 38 09 00 90 61 00 00  c8 38 09 00 90 61 00 00  98 33 09 00

              ^~~~~~~~~~~~~~~~~~~~~~~

              vptr for 'Field_bit_as_char'

    #0 0x5596828decab in field_longlong::get_opt_type(String*, unsigned long long) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_analyse.cc:968

    #1 0x5596828ece16 in analyse::end_of_records() /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_analyse.cc:792

    #2 0x5596807224c4 in end_send /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_select.cc:24674

    #3 0x55968084cc0d in do_select /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_select.cc:22963

    #4 0x55968084cc0d in JOIN::exec_inner() /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_select.cc:4941

    #5 0x559680852129 in JOIN::exec() /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_select.cc:4718

    #6 0x55968083f4bc 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/mtest/MDEV-31606/11.3_opt_san/sql/sql_select.cc:5249

    #7 0x559680843153 in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_select.cc:628

    #8 0x55968041dd4f in execute_sqlcom_select /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_parse.cc:6012

    #9 0x55968046d305 in mysql_execute_command(THD*, bool) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_parse.cc:3911

    #10 0x5596803ecfb0 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_parse.cc:7732

    #11 0x559680443d28 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_parse.cc:1893

    #12 0x55968044f42d in do_command(THD*, bool) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_parse.cc:1406

    #13 0x559680d8f71d in do_handle_one_connection(CONNECT*, bool) /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_connect.cc:1445

    #14 0x559680d91d8c in handle_one_connection /test/mtest/MDEV-31606/11.3_opt_san/sql/sql_connect.cc:1347

    #15 0x14e539faa608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477

    #16 0x14e53921f132 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x11f132)