QGraphicsView&Scene Printer Error.

[Pada_]

Development Environment: Linux 64Bit, Qt5.4.0

I created a QGraphicsScene in the QGraphicsView and a QGraphicsRectItem in the Scene. Same as picture.

And I used scene-> render (& painter) all existing scenes using QPrinter.

If you look at the actual print output, you will not see the left line of QGraphicsRectItem. How can you print thin lines correctly?