ADDITIONAL SYSTEM INFORMATION :
jdk-11.0.21+8-34-g70862e011b



openjdk version "11.0.22-internal" 2024-01-16
OpenJDK Runtime Environment (build 11.0.22-internal+0-adhoc.root.jdk11u-dev)
OpenJDK 64-Bit Server VM (build 11.0.22-internal+0-adhoc.root.jdk11u-dev, mixed mode)



A DESCRIPTION OF THE PROBLEM :
I found that the jdk11-dev version triggered Character.isJavaIdentifierStart(int) failed for codepoint 9feb when executing Character.isJavaIdentifierStart(cp). I wrote a script, tested the stable versions of 17 and 11, and did not get any results. I do not quite understand why this version would consider Character.isJavaIdentifierStart(40939)=true.



ACTUAL -
Exception in thread "main" java.lang.RuntimeException: Character.isJavaIdentifierStart(int) failed for codepoint 9feb
        at test.testIsJavaIdentifierStart_int(test.java:12)
        at test.main(test.java:18)

---------- BEGIN SOURCE ----------
public class test {
    static int JAPANESE_ERA_CODEPOINT = 0x32FF;

    void testIsJavaIdentifierStart_int() throws Exception {
        for (int cp = 0; cp <= Character.MAX_CODE_POINT; cp++) {
            boolean expected = false;
            if (cp != JAPANESE_ERA_CODEPOINT) {
                byte type = (byte) Character.getType(cp);
                expected = Character.isLetter(cp) || type == Character.LETTER_NUMBER || type == Character.CURRENCY_SYMBOL || type == Character.CONNECTOR_PUNCTUATION;
            }
            if (Character.isJavaIdentifierStart(cp) != expected) {
                throw new RuntimeException("Character.isJavaIdentifierStart(int) failed for codepoint " + Integer.toHexString(cp));
            }
        }
    }

    public static void main(String[] args) throws Exception {
        new test().testIsJavaIdentifierStart_int();
    }
}
---------- END SOURCE ----------