reimporting deleted playlist crashes exail

[stm]

When I delete a custom playlist and immediately open an exported version of it, exaile crashes.

Steps to reproduce:
1. Create custom playlist
2. Add some titles to it
3. Export it (as xspf)
4. Delete it
5. Open xspf playlist
6. CRASH

Exaile 0.3.1.1 from ubuntu 10.04.

[Mathias Brodala (mathbr)]

Please also check the current stable 0.3.2 release.

[stm (spam1208)]

Same thing.

[fidencio (fidencio)]

Okay. I think that the bug was solved.
Please, can someone check the patches?

(I'm attaching the first one on this message and the second on the next message)

[fidencio (fidencio)]

And the second ...

[Johannes Sasongko (sjohannes)]

It turns out this was a symptom of a bigger problem. Background: custom playlists are stored in the panel tree model (column 2), as well as a playlist-to-iter cache (playlist_nodes). These two need to be always in sync.

The problem is simply that deleted playlists were not deleted from the playlist_nodes cache.

The thing about opening playlist files was only a coincidence; it happens to trigger code that requires playlist_nodes to be up-to-date. (How can opening a playlist file trigger something in the panel UI code? No idea.)

While fixing this, I found another bug: update_playlist_node modifies playlist_nodes, but not the playlist object in the tree model. I've fixed that as well.

Fix committed to 0.3.2 and trunk.