Damaged JPEG image are loaded without error. It is not possible to know if an image has been correcly loaded. The only error is the following message in the console:
"Corrupt JPEG data: premature end of data segment".

To reproduce the problem, load the attached image with the following code:
include <QtGui>

int main(int argc, char **argv){
QApplication app(argc, argv);
QImage image;
qDebug() << image.load("image.jpg");

QImageReader imageReader("image.jpg");
QImage image2 = imageReader.read();
qDebug() << imageReader.errorString();
return 0;
}

It would be nice to have a way to specify if the QImageIOHandler should fail or not when the data is corrupted.