UBSAN index X out of bounds for type 'int16_t [4]' in FVector::create | FVectorNode::FVectorNode

SET SQL_MODE='';

CREATE TABLE t (pk INT KEY,v VECTOR (5) NOT NULL,VECTOR (v));

INSERT INTO t (pk) VALUES(1);

/test/11.7_opt_san/sql/vector_mhnsw.cc:105:7: runtime error: index 4 out of bounds for type 'int16_t [4]'

SUMMARY: UndefinedBehaviorSanitizer: out-of-bounds-index /test/11.7_opt_san/sql/vector_mhnsw.cc:105:7 in 

    #0 0x29df080 in FVector::create(metric_type, void*, void const*, unsigned long) /test/11.7_opt_san/sql/vector_mhnsw.cc:105:20

    #1 0x29e0828 in FVectorNode::FVectorNode(MHNSW_Share*, void const*, unsigned char, void const*) /test/11.7_opt_san/sql/vector_mhnsw.cc:712:8

    #2 0x29e59ca in mhnsw_insert(TABLE*, st_key*) /test/11.7_opt_san/sql/vector_mhnsw.cc:1164:20

    #3 0xd07ba3 in TABLE::hlindexes_on_insert() /test/11.7_opt_san/sql/sql_base.cc:9880:18

    #4 0x2219062 in handler::ha_write_row(unsigned char const*) /test/11.7_opt_san/sql/handler.cc:8192:34

    #5 0xe6baa1 in write_record(THD*, TABLE*, st_copy_info*, select_result*) /test/11.7_opt_san/sql/sql_insert.cc:2312:12

    #6 0xe58224 in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /test/11.7_opt_san/sql/sql_insert.cc:1171:14

    #7 0x101a22d in mysql_execute_command(THD*, bool) /test/11.7_opt_san/sql/sql_parse.cc:4485:10

    #8 0xfd9e02 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.7_opt_san/sql/sql_parse.cc:7915:18

    #9 0xfce6d4 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.7_opt_san/sql/sql_parse.cc:1903:7

    #10 0xfdcc3e in do_command(THD*, bool) /test/11.7_opt_san/sql/sql_parse.cc:1416:17

    #11 0x181e2b4 in do_handle_one_connection(CONNECT*, bool) /test/11.7_opt_san/sql/sql_connect.cc:1415:11

    #12 0x181d884 in handle_one_connection /test/11.7_opt_san/sql/sql_connect.cc:1327:5

    #13 0x146da493a608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477:8

    #14 0x146da4650132 in clone /build/glibc-SzIz7B/glibc-2.31/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95

SUMMARY: UndefinedBehaviorSanitizer: out-of-bounds-index /test/11.7_opt_san/sql/vector_mhnsw.cc:105:7 in

Compiled with a recent version of Clang (I used Clang 10.0.0) with LLVM 18:

     # Note: llvm-17-linker-tools installs /usr/lib/llvm-17/lib/LLVMgold.so, which is needed for compilation, and LLVMgold.so is no longer included in LLVM 18

     sudo apt install clang llvm-18 llvm-18-linker-tools llvm-18-runtime llvm-18-tools llvm-18-dev libstdc++-14-dev llvm-dev llvm-17-linker-tools

     sudo ln -s /usr/lib/llvm-17/lib/LLVMgold.so /usr/lib/llvm-18/lib/LLVMgold.so

Compiled with: '-DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++' and:

    -DWITH_ASAN=ON -DWITH_ASAN_SCOPE=ON -DWITH_UBSAN=ON -DWSREP_LIB_WITH_ASAN=ON

Set before execution:

    export UBSAN_OPTIONS=print_stacktrace=1:report_error_type=1   # And you may also want to supress UBSAN startup issues using 'suppressions=UBSAN.filter'. For an example of UBSAN.filter, which includes current startup issues see: https://github.com/mariadb-corporation/mariadb-qa/blob/master/UBSAN.filter