Affected Mod Versions:

Streams Mod and maybe Ore Plants Mod:
http://minecraft.curseforge.com/projects/ore-plants
http://minecraft.curseforge.com/projects/streams

• Forge version: 12.18.1.2026
• RTG version: 2.0.0

Issue Description:

Crash while in the world generating new chunks

Steps to reproduce the issue: (If it's easily reproducible.)

1. Walk around until streams tries to generate.

Extra Information:

-Crashlog: http://pastebin.com/itXzZqrQ

I'm now using the latest RTG and Streams and it's working flawlessly.

This looks to be most likely an issue with Streams. You should open an issue in the Streams Repo.
If you open an issue there, please link this issue by adding "#882" to your post.

Due to the nature of Issue #866, I'll keep this open until I hear back from @delvr