#fixed code
                             @Override
	public void onHttpFinish(QQHttpResponse response) {
		try {
			LOG.debug(response.getContentType());
			String type = response.getContentType();
			if(type!=null && (type.startsWith("application/x-javascript")
					|| type.startsWith("application/json")
					|| type.indexOf("text") >= 0
					) && response.getContentLength() > 0){
				LOG.debug(response.getResponseString());
			}

			if(response.getResponseCode() == QQHttpResponse.S_OK){
				onHttpStatusOK(response);
			}else{
				onHttpStatusError(response);
			}
		} catch (QQException e) {
			notifyActionEvent(QQActionEvent.Type.EVT_ERROR, e);
		} catch (JSONException e) {
			notifyActionEvent(QQActionEvent.Type.EVT_ERROR, new QQException(QQErrorCode.JSON_ERROR, e));
		} catch (Throwable e){
			notifyActionEvent(QQActionEvent.Type.EVT_ERROR, new QQException(QQErrorCode.UNKNOWN_ERROR, e));
		}
	}
#vulnerable code 
                             @Override
	public void onHttpFinish(QQHttpResponse response) {
		try {
			LOG.debug(response.getContentType());
			String type = response.getContentType();
			if((type.startsWith("application/x-javascript")
					|| type.startsWith("application/json")
					|| type.indexOf("text") >= 0
					) && response.getContentLength() > 0){
				LOG.debug(response.getResponseString());
			}

			if(response.getResponseCode() == QQHttpResponse.S_OK){
				onHttpStatusOK(response);
			}else{
				onHttpStatusError(response);
			}
		} catch (QQException e) {
			notifyActionEvent(QQActionEvent.Type.EVT_ERROR, e);
		} catch (JSONException e) {
			notifyActionEvent(QQActionEvent.Type.EVT_ERROR, new QQException(QQErrorCode.JSON_ERROR, e));
		} catch (Throwable e){
			notifyActionEvent(QQActionEvent.Type.EVT_ERROR, new QQException(QQErrorCode.UNKNOWN_ERROR, e));
		}
	} 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE