I cannot reproduce this problem. If this happens again, please add as much details as possible and re-open this ticket.

Happening again, seems to be related to using http://userscripts.org/scripts/show/118491 to change the ACs just after parsing a tracklist. I know that might mean it's not directly a MBS issue, but since a) it points at something fishy going on and b) classical editing is pretty much impossible without that script anyway, it'd be great if this could get looked at.

reo: you might also point bitmap at this bug, given that's his script but I agree this suggests there's something fishy in the RE itself too.

I tested this on a few existing releases, and on a new one (parsing tracklist, then changing artists with the script) and I didn't encounter any issue. I can look into it further, but need a release that it always breaks on (with steps on how to break it).

Release artist: [{"gid":"a4eba7b5-aceb-4acf-b297-3c0a3cd42757","id":"41542","name":"Александр Николаевич Скрябин","sortname":"","credit":"Alexander Scriabin","join":"; "},{"gid":"c6c4103b-cf07-42ad-91a7-b7eab7586e56","id":"245008","name":"Royal Scottish National Orchestra","sortname":"","credit":"Scottish National Orchestra","join":", "},{"gid":"8a1d9496-603f-40b1-a38d-2e8985834940","id":"45573","name":"Neeme Järvi","sortname":"","credit":"","join":""}]

Parsed tracklist:

1 Symphony no. 2 in C minor, op. 29: I. Andante - 5:41
2 Symphony no. 2 in C minor, op. 29: II. Allegro 9:13
3 Symphony no. 2 in C minor, op. 29: III. Andante 11:30
4 Symphony no. 2 in C minor, op. 29: IV. Tempestoso - 5:30
5 Symphony no. 2 in C minor, op. 29: V. Maestoso 7:52
6 Rêverie, op. 24 3:48

Once parsed, use script to leave track artist as:

[{"gid":"c6c4103b-cf07-42ad-91a7-b7eab7586e56","id":"245008","name":"Royal Scottish National Orchestra","sortname":"","credit":"","join":", "},{"gid":"8a1d9496-603f-40b1-a38d-2e8985834940","id":"45573","name":"Neeme Järvi","sortname":"","credit":"","join":""}]

(no credit as for the orchestra as opposed as in release artist).

Click the Edit Note tab.

This has eaten my tracklist twice in different sessions so I hope you can reproduce it!

Huh, still nothing so far. I tried the above steps 3 times on mb.org and 3 times on beta, in Chrome 23.0.1271.101, plus once in Firefox just to be safe.

Hmm. Try manually removing the stuff from the track artist rather than directly copying that credit (so, removing the composer and removing the "credited as" for the orchestra). If that doesn't do it either, I give up

Aha! Yeah, it consistently breaks if I edit the artists manually rather than with the script. I also tried everything by hand, without the script loaded, and it still breaks, which means it shouldn't be a problem with my script at all (phew). The script just makes it easier to reproduce.

Hopefully warp doesn't mind me stealing this ticket from him, but since I already spent time debugging it...

http://codereview.musicbrainz.org/r/2494