Gallery crashes on first run on thumbnail generation

[Omer Akram]

0. Make sure you have a clean install and you never started gallery app
1. Take a few photos with the camera and close it
2. open gallery

What happens:
It crashes.

PS: you don't really need a clean install just delete gallery' QML cache in ~/.cache/QML/Apps

Reproduced on :
current build number: 183
device name: krillin
channel: ubuntu-touch/ubuntu-rtm/14.09-proposed
last update: 2014-12-18 13:29:15
version version: 183
version ubuntu: 20141217.2
version device: 20141209-cae2b5f
version custom: 20141216-484-22-169

com.ubuntu.gallery 2.9.1.1113
thumbnailer 1.3+15.04.20141106~rtm-0ubuntu1
qtubuntu-camera 0.3.3+15.04.20141208.is.0.3.3+15.04.20141204~rtm-0ubuntu1

[Omer Akram (om26er)]

Just a note it does *not* only happen on first run, but thats an easy way to reproduce it.

[Jussi Pakkanen (jpakkane)]

The reason this happens is that whoever is creating the images produces invalid image files. I have attached one to this bug and trying to open it with eog prints the following error (which is the same as what thumbnailer prints in the background):

Failed to load image '/home/phablet/Pictures/com.ubuntu.camera/image20141218_143650580.jpg': Error interpreting JPEG image file (Quantization table 0x00 was not defined)

When this happens, thumbnailer passes the original image to Qt. Presumably this causes it to then crash. If so, this would indicate a bug in Qt's image processing code.