When enabling UBSAN (configure flag '--enable-ubsan') on Linux x86_64 in a fastdebug build, the new JVM is already used in the build and runs into this runtime error

/jdk/src/hotspot/share/runtime/signature.hpp:343:42: runtime error: shift exponent 65 is too large for 64-bit type 'long unsigned int'
    #0 0x1532f87668d0 in Fingerprinter::do_type(BasicType) /jdk/src/hotspot/share/runtime/signature.hpp:343
    #1 0x1532f87668d0 in void SignatureIterator::do_parameters_on<Fingerprinter>(Fingerprinter*) /jdk/src/hotspot/share/runtime/signature.hpp:617
    #2 0x1532f87668d0 in Fingerprinter::compute_fingerprint_and_return_type(bool) /jdk/src/hotspot/share/runtime/signature.cpp:169
    #3 0x1532f9e4ca28 in Fingerprinter::Fingerprinter(Symbol*, bool) /jdk/src/hotspot/share/runtime/signature.hpp:363
    #4 0x1532f9e4ca28 in ConstMethod::compute_from_signature(Symbol*, bool) /jdk/src/hotspot/share/oops/constMethod.cpp:81
    #5 0x1532f9c0b360 in ClassFileParser::parse_method(ClassFileStream const*, bool, ConstantPool const*, bool*, JavaThread*) /jdk/src/hotspot/share/classfile/classFileParser.cpp:2733
    #6 0x1532f9c0e4cf in ClassFileParser::parse_methods(ClassFileStream const*, bool, bool*, bool*, bool*, JavaThread*) /jdk/src/hotspot/share/classfile/classFileParser.cpp:2866
    #7 0x1532f9c1054e in ClassFileParser::parse_stream(ClassFileStream const*, JavaThread*) /jdk/src/hotspot/share/classfile/classFileParser.cpp:5867
    #8 0x1532f9c11e1e in ClassFileParser::ClassFileParser(ClassFileStream*, Symbol*, ClassLoaderData*, ClassLoadInfo const*, ClassFileParser::Publicity, JavaThread*) /jdk/src/hotspot/share/classfile/classFileParser.cpp:5593
    #9 0x1532fb24c929 in KlassFactory::create_from_stream(ClassFileStream*, Symbol*, ClassLoaderData*, ClassLoadInfo const&, JavaThread*) /jdk/src/hotspot/share/classfile/klassFactory.cpp:202
    #10 0x1532f9c3edd1 in ClassLoader::load_class(Symbol*, PackageEntry*, bool, JavaThread*) /jdk/src/hotspot/share/classfile/classLoader.cpp:1169
    #11 0x1532fc49db13 in SystemDictionary::load_instance_class_impl(Symbol*, Handle, JavaThread*) /jdk/src/hotspot/share/classfile/systemDictionary.cpp:1279
    #12 0x1532fc4986ec in SystemDictionary::load_instance_class(Symbol*, Handle, JavaThread*) /jdk/src/hotspot/share/classfile/systemDictionary.cpp:1343
    #13 0x1532fc4998d6 in SystemDictionary::resolve_instance_class_or_null(Symbol*, Handle, Handle, JavaThread*) /jdk/src/hotspot/share/classfile/systemDictionary.cpp:702
   ... (rest of output omitted)

Not sure if it is a big issue but probably the shifting code should be checked.