output: #fixed code
                               @Override
  	public void processEvent(SystemEvent event) throws AbortProcessingException {
  		if (event instanceof PreDestroyViewMapEvent) {
  			getReference(ViewScopeManager.class).preDestroyView();
  		}
  	}
input: #vulnerable code 
                               @Override
  	public void processEvent(SystemEvent event) throws AbortProcessingException {
  		if (event instanceof PreDestroyViewMapEvent) {
  			BeanManager.INSTANCE.getReference(ViewScopeManager.class).preDestroyView();
  		}
  	} 
                              #location 4 
                              #vulnerability type NULL_DEREFERENCE