#vulnerable code 
                              @Test
  public void describeAsAdditionalInfo_notEmpty() {
    Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
    addCompareException(exceptions);
    assertExpectedFacts(
        exceptions.describeAsAdditionalInfo().asIterable(),
        "additionally, one or more exceptions were thrown while comparing elements");
  } 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                              @Test
  public void describeAsAdditionalInfo_notEmpty() {
    Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
    addCompareException(exceptions);
    assertExpectedFacts(
        exceptions.describeAsAdditionalInfo(),
        "additionally, one or more exceptions were thrown while comparing elements");
  }