import java.util.regex.Pattern;

public class RegexSupplementaryBugDemo {
    public static void main(String[] args) {
        System.out.println("Testing escaped codepoint with CANON_EQ");
        Pattern.compile("\\x{1d434}", Pattern.CANON_EQ);

        System.out.println("Testing codepoint without CANON_EQ");
        Pattern.compile("\ud835\udc34");

        System.out.println("Testing codepoint with CANON_EQ");
        Pattern.compile("\ud835\udc34", Pattern.CANON_EQ);
    }
}