1. Compile the sample test.
2. Start jdb:
$ jdb -classpath . -XX:+EnableValhalla Test
3. Set breakpoint on the line with System.out.println()
> stop at Test:8
4. Run to breakpoint
> run
5. Assign null to variable v
> set v = null
or
> eval v = null
6. Print value of v
> print v

Expected result:
On step 5 the error "error: incompatible types: <null> cannot be converted to MyValue" should be reported
Actual result:
Step 5 succeeds. Step 6 outputs "v = null"

===============================
public class Test {

  public static void main(String[] args){

    MyValue v = new MyValue(12,'c');
    System.out.println("v == v " + (v == v));
  }

  public final __ByValue static class MyValue {
      int a;
      char b;

      public MyValue(int a, char b){
        this.a = a;
        this.b = b;
      }

  }

}