UBSAN: runtime error: load of value 43, which is not a valid value for type 'bool' on I_S SELECT

SELECT view_definition FROM information_schema.views;

/test/10.5_dbg_san/sql/sql_view.cc:1230:8: runtime error: load of value 43, which is not a valid value for type 'bool'

SUMMARY: UndefinedBehaviorSanitizer: invalid-bool-load /test/10.5_dbg_san/sql/sql_view.cc:1230:8 

    #0 0x55a7906017d2 in mysql_make_view(THD*, TABLE_SHARE*, TABLE_LIST*, bool) /test/10.5_dbg_san/sql/sql_view.cc:1230:8

    #1 0x55a79018eefe in fill_schema_table_from_frm(THD*, st_mem_root*, TABLE*, st_schema_table*, st_mysql_const_lex_string*, st_mysql_const_lex_string*, Open_tables_backup*, bool) /test/10.5_dbg_san/sql/sql_show.cc:5039:9

    #2 0x55a790181c87 in get_all_tables(THD*, TABLE_LIST*, Item*) /test/10.5_dbg_san/sql/sql_show.cc:5320:20

    #3 0x55a7901f737a in get_schema_tables_result(JOIN*, enum_schema_table_state) /test/10.5_dbg_san/sql/sql_show.cc:9011:11

    #4 0x55a78fe72be9 in JOIN::exec_inner() /test/10.5_dbg_san/sql/sql_select.cc:4618:7

    #5 0x55a78fe6c8d1 in JOIN::exec() /test/10.5_dbg_san/sql/sql_select.cc:4441:3

    #6 0x55a78fd1b543 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/10.5_dbg_san/sql/sql_select.cc:4918:9

    #7 0x55a78fd170c7 in handle_select(THD*, LEX*, select_result*, unsigned long) /test/10.5_dbg_san/sql/sql_select.cc:449:10

    #8 0x55a78faf33f0 in execute_sqlcom_select(THD*, TABLE_LIST*) /test/10.5_dbg_san/sql/sql_parse.cc:6437:12

    #9 0x55a78fa8759f in mysql_execute_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:4029:12

    #10 0x55a78fa2e4e3 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:8237:18

    #11 0x55a78fa0e453 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:1891:7

    #12 0x55a78fa36a19 in do_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:1375:17

    #13 0x55a7909b0f30 in do_handle_one_connection(CONNECT*, bool) /test/10.5_dbg_san/sql/sql_connect.cc:1386:11

    #14 0x55a7909af6fd in handle_one_connection /test/10.5_dbg_san/sql/sql_connect.cc:1298:5

    #15 0x55a78eeaaa8c in asan_thread_start(void*) asan_interceptors.cpp.o

    #16 0x14a046c9ca93 in start_thread nptl/pthread_create.c:447:8

    #17 0x14a046d29c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: invalid-bool-load /test/10.5_dbg_san/sql/sql_view.cc:1230:8 

Compiled with a recent version of Clang (I used Clang 18.1.3) with LLVM 18:

# 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

    -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