java.util.prefs.Preferences sync() not throwing IllegalStateException
when node is removed.
Program is below:


import java.util.prefs.*;
import java.util.*;
 

public class Sync {
    
    public static void main(String[] args) throws Exception {
 
        try {
            Preferences userRoot = Preferences.userRoot();
            Preferences N1 = userRoot.node("N1");
            Preferences N2 = N1.node("N2");
            N1.put("k1","v1");
            N2.put("k2","v2");
            N2.removeNode();
            N2.sync();
            System.out.println("Sync Test Fail");
        } catch(IllegalStateException ise) {
            System.out.println("Expected IllegalStateException thrown Sync Test Pass");
        } catch(Exception e) {
            System.out.println("Exception thrown = " + e);
            System.out.println("Sync Test Fail");
            e.printStackTrace();
        }
   }
}