FallingBlock entity crashing minecraft

I'm making a plugin that transforms blocks into fallingblocks (a type of entity) on certain conditions. When a falling block collides with another block, it is supposed to cause the other block to fall and continue falling if possible, or come to a rest if the ground is "solid" and no blocks below it can fall.

The plugin in general is working, however when a fallingblock collides with another block that should be able to fall, minecraft crashes. No errors appear in the server, but minecraft bluescreens then crashes.

Pastebin of crash report here:
http://pastebin.com/NgFa9qUQ

Any advice as to why this is happening? In my opinion the most likely way to crash minecraft but not the server is with an infinite loop, but I have repeatedly checked and there is no infinite loop.

I would prefer not to post my code, but if you need it I can pm it to you.

Bump. Unable to get this to work properly. Any Tips?

By the way, I have now managed to crash minecraft from this plugin about 15 different ways. This is making me wonder if the bukkit team did a hack-ish approach to adding the spawnfallingblock method...

Bump again. Still need help.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

don't bump that much. Post something useful like code instead