QML image cannot open a file which has a hash mark (#) in filename

How to reproduce

1. Create (or copy) a JPEG image with name "test.jpg"

2. Create ShowImage.qml file with the following content
import QtQuick 1.1
Image

3. Run qmlviewer ShowImage.qml and check that the image is visible

4. Edit the ShowImage.qml and change "test.jpg" to "test#.jpg"

5. Rename the JPEG file to "test#.jpg"

6. Run qmlviewer ShowImage.qml. No image is visible. Open the warnings dialog. It should say something like
file:///ShowImage.qml:3:1: QML Image: Cannot open: file:///test#.jpg

7. Verify that the "test#.jpg" file can be opened and viewed in other image viewer application. For example in Windows use the built-in Windows Photo Viewer application.