IllegalAccessError when mocking ProcessBuilder with Java 9

[assylias]

jmockit 1.33
TestNG 6.9.10
Java 9 (build 177)

This test throws an IllegalAccessError at runtime:

public class MainTest {
  @Test public void test(@Mocked ProcessBuilder pb) throws IOException {
    new Expectations() {{ pb.start(); result = null; }};
    assertNull(m());
  }

  public static Process m() throws IOException {
    return new ProcessBuilder("").start();
  }
}

Stacktrace:

java.lang.IllegalAccessError: class java.lang.ProcessBuilder (in module java.base) cannot access class javax.print.PrintException (in module java.desktop) because module java.base does not read module java.desktop

    at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java)
    at MainTest$1.<init>(MainTest.java:14)
    at MainTest.test(MainTest.java:14)

Related stackoverflow question: https://stackoverflow.com/q/45018360/829571