When using ubsan we run into the following error :

src/hotspot/share/interpreter/templateTable.cpp:62:3: runtime error: call to function TemplateTable::nop() through pointer to incorrect function type 'void (*)(int)'
templateTable_x86.cpp:258: note: TemplateTable::nop() defined here
    #0 0x1225c96b2 in Template::generate(InterpreterMacroAssembler*) templateTable.cpp:62
    #1 0x1225af68c in TemplateInterpreterGenerator::generate_and_dispatch(Template*, TosState) templateInterpreterGenerator.cpp:394
    #2 0x1225c1e71 in TemplateInterpreterGenerator::set_vtos_entry_points(Template*, unsigned char*&, unsigned char*&, unsigned char*&, unsigned char*&, unsigned char*&, unsigned char*&, unsigned char*&, unsigned char*&, unsigned char*&) templateInterpreterGenerator_x86.cpp:1785
    #3 0x1225adf21 in TemplateInterpreterGenerator::set_entry_points(Bytecodes::Code) templateInterpreterGenerator.cpp:327
    #4 0x1225add23 in TemplateInterpreterGenerator::set_entry_points_for_all_bytes() templateInterpreterGenerator.cpp:283
    #5 0x1225ac70c in TemplateInterpreterGenerator::generate_all() templateInterpreterGenerator.cpp:241
    #6 0x1225a685e in TemplateInterpreter::initialize_code() templateInterpreter.cpp:67
    #7 0x121903666 in interpreter_init_code() interpreter.cpp:142
    #8 0x1218bef60 in init_globals2() init.cpp:156
    #9 0x122620dee in Threads::create_vm(JavaVMInitArgs*, bool*) threads.cpp:572
    #10 0x121a8c4ab in JNI_CreateJavaVM_inner(JavaVM_**, void**, void*) jni.cpp:3581
    #11 0x10f2d071c in JavaMain java.c:491
    #12 0x10f2d7248 in ThreadJavaMain java_md_macosx.m:720
   ... (rest of output omitted)

Reason is a mismatch of the generator function typedef compared to the real interface.
The generator function is

  typedef void (*generator)(int arg);

But TemplateTable::nop() is 'void (*)(int)' .