I broke a dungeon chest and got a CTD. No clue what is in the chest that made it happen. The magnet API does not like what is in it.

http://pastebin.com/YXxK4GAi

Ah. This is a problem, since some items intercept getItemDamage I can't use it properly for recursion. Hm.

3b6ebca will have to do

Well, that was quick...

I feel like this isn't the full crash log... I'm missing part of the summary info... Is that correct?

Also, this doesn't look... possible. The recursion is happening, but Vazkii is setting the damage correctly o.O

can you give us a list of mods, perhaps? maybe one of them is messing with this.

Hmmmm, according to the crash log, there is an unknown entity near all the dropped items from the chest... Possibly the culprit? Also, is it normal for a level game mode to be "ERROR NullPointerException: null"?

You should be able to use MCEdit to find what the ID of the entity is, then look that up in-game to find out what item was causing the problem? I didn't know there WAS a blacklist for the magnet.

The issue was resolved, @Zsashas. The problem would not have been solved by your method.

I was thinking more along the lines of simply finding out what the item was that caused the issue in the first place, might be useful to know.