scope doesn't handle exception during start()

[Michi Henning]

I just ran up the scope while the mediascanner was still indexing a large collection I had dropped into the music folder.

When I switched to the mediascanner scope, I ended up with a completely blank screen, nothing shown at all. In registry log, I found this:

scoperunner: unity::ResourceException: Scope mediascanner-music: exception from start():
    Tried to open a db with schema versino -1, while supported version is 10.

Trying to refresh didn't do anything. The bouncing bar showed up for a while, and I was still left with a blank screen.

It seems that the scope eventually recovers. I left the phone sitting there for a while and, next time I glanced at it, the scope had populated the screen.

[Paweł Stołowski (stolowski)]

I think this is basically the same problem as the one I reported 2 years ago: https://bugs.launchpad.net/ubuntu/+source/unity-scope-mediascanner/+bug/1288170