bworld - java laucher vs restricted field

[Remi Forax]

Hello,
I'm testing the restricted fields on the bworld branch,
running the source code directly with the command "java" without using javac 
failed.

step to reproduce:

$JAVA_HOME/bin/java --enable-preview ComplexBox.java

ComplexBox.java:10: error: cannot access NullRestricted
public class ComplexBox {
       ^
  class file for jdk.internal.vm.annotation.NullRestricted not found
1 error
error: compilation failed

If instead, I first compile and then run, there is no issue.

---
public class ComplexBox {
  public value record Complex(int re, int im) {}

  private Complex! complex;

  public ComplexBox(Complex! complex) {
    this.complex = complex;
    super();
  }

  @Override
  public String toString() {
    return "ComplexBox (" + complex + ")";
  }

  // -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlineLayout
  static void main() {
    var complex = new Complex(2, 1);
    var box = new ComplexBox(complex);

    IO.println(box);
  }
}