Segmentation fault with FXImage.rotate

FXImage.rotate results in a segmentation fault if the rotation is used for other than 0, 90, 180 or 270 degrees. The Fox toolkit only supports these degrees for rotating FXImages, but the documentation of FXRuby doesn't state this clear and the warning from Fox isn't passed to FXRuby.

img = FXImage.new(app, nil, IMAGE_OWNED | IMAGE_KEEP, 20, 20)
img.setPixel(5, 5, FXColor::Yellow)
img.create
dc.drawImage(img, 50, 50)
img.rotate(45) # <- segmentation fault
dc.drawImage(img, 80, 80)