#vulnerable code 
                             private byte[] responseToBytes() {
		try {
			return response.renderToBytes();

		} catch (Throwable e) {
			HttpIO.error(this, e, custom().errorHandler());

			try {
				return response.renderToBytes();

			} catch (Exception e1) {
				Log.error("Internal rendering error!", e1);
				return HttpUtils.getErrorMessageAndSetCode(response, e1).getBytes();
			}
		}
	} 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             private byte[] responseToBytes() {
		try {
			return response.renderToBytes();

		} catch (Throwable e) {
			HttpIO.error(this, e, Customization.of(this).errorHandler());

			try {
				return response.renderToBytes();

			} catch (Exception e1) {
				Log.error("Internal rendering error!", e1);
				return HttpUtils.getErrorMessageAndSetCode(response, e1).getBytes();
			}
		}
	}