Unexpected ER_DUP_ENTRY/ER_DUP_KEY, ASAN errors after TRUNCATE on table with vector index

--source include/have_innodb.inc

CREATE TABLE t (pk INT PRIMARY KEY, i INT, v BLOB NOT NULL DEFAULT x'00000000', KEY (i), VECTOR INDEX (v)) ENGINE=InnoDB;

INSERT INTO t (pk,i) VALUES (1,1),(2,2);

TRUNCATE TABLE t;

INSERT INTO t (pk,i) VALUES (1,3),(2,4);

# Cleanup

DROP TABLE t;

TRUNCATE TABLE t;

INSERT INTO t (pk,i) VALUES (1,3),(2,4);

bug.vec12a-1                             [ fail ]

        Test ended at 2024-09-27 15:25:47

CURRENT_TEST: bug.vec12a-1

mysqltest: At line 6: query 'INSERT INTO t (pk,i) VALUES (1,3),(2,4)' failed: ER_DUP_ENTRY (1062): Duplicate entry '3' for key 'i'

--source include/have_innodb.inc

CREATE TABLE t (i INT, v BLOB NOT NULL DEFAULT x'00000000', KEY (i), VECTOR INDEX (v)) ENGINE=InnoDB;

INSERT INTO t (i) VALUES (1),(2);

TRUNCATE TABLE t;

INSERT INTO t (i) VALUES (3),(4);

# Cleanup

DROP TABLE t;

TRUNCATE TABLE t;

INSERT INTO t (i) VALUES (3),(4);

bug.vec12a-1                             [ fail ]

        Test ended at 2024-09-27 15:27:48

CURRENT_TEST: bug.vec12a-1

mysqltest: At line 6: query 'INSERT INTO t (i) VALUES (3),(4)' failed: ER_DUP_KEY (1022): Can't write; duplicate key in table 't'

--source include/have_innodb.inc

CREATE TABLE t (i INT, v BLOB NOT NULL DEFAULT x'00000000', KEY (i), VECTOR INDEX (v)) ENGINE=InnoDB;

INSERT INTO t (i) VALUES (1),(2);

TRUNCATE TABLE t;

REPLACE INTO t (i) VALUES (3),(4);

# Cleanup

DROP TABLE t;

==3119576==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address 0x7effb7bf9040 at pc 0x55b7034629de bp 0x7effb7bf8f10 sp 0x7effb7bf8f08

WRITE of size 2 at 0x7effb7bf9040 thread T11

    #0 0x55b7034629dd in Field_blob::get_key_image_itRAW(unsigned char const*, unsigned char*, unsigned int) const /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/field.cc:8976

    #1 0x55b703484195 in Field_blob::get_key_image(unsigned char*, unsigned int, unsigned char const*, Field::imagetype) const /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/field.h:4642

    #2 0x55b70380c277 in key_copy(unsigned char*, unsigned char const*, st_key const*, unsigned int, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/key.cc:150

    #3 0x55b702a6fcc2 in write_record(THD*, TABLE*, st_copy_info*, select_result*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_insert.cc:2050

    #4 0x55b702a68cfd in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_insert.cc:1179

    #5 0x55b702b38fc7 in mysql_execute_command(THD*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:4458

    #6 0x55b702b50b89 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:7873

    #7 0x55b702b27bab in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:1892

    #8 0x55b702b248bf in do_command(THD*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:1405

    #9 0x55b703014420 in do_handle_one_connection(CONNECT*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_connect.cc:1448

    #10 0x55b703013de1 in handle_one_connection /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_connect.cc:1350

    #11 0x55b703cb5999 in pfs_spawn_thread /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/pfs.cc:2198

    #12 0x7effc7aa8043 in start_thread nptl/pthread_create.c:442

    #13 0x7effc7b2861b in clone3 ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Address 0x7effb7bf9040 is located in stack of thread T11

SUMMARY: AddressSanitizer: dynamic-stack-buffer-overflow /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/field.cc:8976 in Field_blob::get_key_image_itRAW(unsigned char const*, unsigned char*, unsigned int) const

Shadow bytes around the buggy address:

  0x0fe076f771b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f771c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f771d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f771e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f771f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

=>0x0fe076f77200: 00 00 00 00 ca ca ca ca[cb]cb cb cb 00 00 00 00

  0x0fe076f77210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f77220: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 f3 f3 f3 f3

  0x0fe076f77230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f77240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

  0x0fe076f77250: 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f8 f8

Shadow byte legend (one shadow byte represents 8 application bytes):

  Addressable:           00

  Partially addressable: 01 02 03 04 05 06 07 

  Heap left redzone:       fa

  Freed heap region:       fd

  Stack left redzone:      f1

  Stack mid redzone:       f2

  Stack right redzone:     f3

  Stack after return:      f5

  Stack use after scope:   f8

  Global redzone:          f9

  Global init order:       f6

  Poisoned by user:        f7

  Container overflow:      fc

  Array cookie:            ac

  Intra object redzone:    bb

  ASan internal:           fe

  Left alloca redzone:     ca

  Right alloca redzone:    cb

Thread T11 created by T0 here:

    #0 0x7effc8649726 in __interceptor_pthread_create ../../../../src/libsanitizer/asan/asan_interceptors.cpp:207

    #1 0x55b703cb173b in my_thread_create /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/my_thread.h:38

    #2 0x55b703cb5d88 in pfs_spawn_thread_v1 /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/pfs.cc:2249

    #3 0x55b702740c33 in inline_mysql_thread_create /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/include/mysql/psi/mysql_thread.h:1139

    #4 0x55b7027593fa in create_thread_to_handle_connection(CONNECT*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6267

    #5 0x55b702759a1f in create_new_thread(CONNECT*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6329

    #6 0x55b702759d0a in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6391

    #7 0x55b70275a992 in handle_connections_sockets() /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6504

    #8 0x55b702758c77 in mysqld_main(int, char**) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6162

    #9 0x55b70273fd58 in main /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/main.cc:34

    #10 0x7effc7a461c9 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58