$ ./bin/mariadb -uroot --socket=${PWD}/socket.sock

/test/clang_new/10.5_dbg_san/libmariadb/plugins/auth/my_auth.c:94:9: runtime error: call to function (unknown) through pointer to incorrect function type 'int (*)(struct st_plugin_vio *, const unsigned char *, int)'

(/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x5ce828): note: (unknown) defined here

    #0 0x5635f274160c  (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x5cb60c) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #1 0x5635f2742e4c in run_plugin_auth (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x5cce4c) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #2 0x5635f2620b2c in mthd_my_real_connect (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x4aab2c) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #3 0x5635f2618394 in mysql_real_connect (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x4a2394) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #4 0x5635f25c6e3a  (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x450e3a) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #5 0x5635f25d5bcc  (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x45fbcc) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #6 0x5635f259b812  (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x425812) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #7 0x5635f25989c0 in main (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x4229c0) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

    #8 0x153180c2a1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

    #9 0x153180c2a28a in __libc_start_main csu/../csu/libc-start.c:360:3

    #10 0x5635f24b7ca4 in _start (/test/CLANG_UBASAN_MD251124-mariadb-10.5.28-linux-x86_64-dbg/bin/mariadb+0x341ca4) (BuildId: 11e9790fec8b3dff9cd05600a31d9a48007bd9ae)

SUMMARY: UndefinedBehaviorSanitizer: function-type-mismatch /test/clang_new/10.5_dbg_san/libmariadb/plugins/auth/my_auth.c:94:9 

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

...

export UBSAN_OPTIONS=print_stacktrace=1:report_error_type=1