When building with ubsan (--enable-ubsan configure option) we run into this issue

/open_jdk/jdk_test/jdk/src/hotspot/share/code/vtableStubs.hpp:176:60: runtime error: load of value 204, which is not a valid value for type 'bool'
    #0 0x110a6ad7e in VtableStubs::entry_point(unsigned char*) vtableStubs.cpp:280
    #1 0x10f4cc8e6 in CompiledIC::is_megamorphic() const compiledIC.cpp:293
    #2 0x10f4cc95d in CompiledIC::update(CallInfo*, Klass*) compiledIC.cpp:268
    #3 0x110592eed in SharedRuntime::resolve_helper(bool, bool, JavaThread*) sharedRuntime.cpp:1366
    #4 0x11058c0b3 in SharedRuntime::resolve_virtual_call_C(JavaThread*) sharedRuntime.cpp:1514
    #5 0x12cd2e55a (<unknown module>)
    #6 0x12580e03b (<unknown module>)
    #7 0x12cc1f321 (<unknown module>)
    #8 0x12cc1f321 (<unknown module>)

Not sure where the 204 is coming from; test was done on macOS x86_64 .