#fixed code
                              public void bindScope(Class<? extends Annotation> annotationType,
      Scope scope) {
    Scope existing = scopes.get(nonNull(annotationType, "annotation type"));
    if (existing != null) {
      addError(source(), ErrorMessages.DUPLICATE_SCOPES, existing,
          annotationType, scope);
    }
    else {
      scopes.put(annotationType, nonNull(scope, "scope"));
    }
  }
#vulnerable code 
                              public void bindScope(Class<? extends Annotation> annotationType,
      Scope scope) {
    ensureNotCreated();
    Scope existing = scopes.get(nonNull(annotationType, "annotation type"));
    if (existing != null) {
      addError(source(), ErrorMessages.DUPLICATE_SCOPES, existing,
          annotationType, scope);
    }
    else {
      scopes.put(annotationType, nonNull(scope, "scope"));
    }
  } 
                            #location 3 
                            #vulnerability type THREAD_SAFETY_VIOLATION