It crashed on world creation with the exception generating new chunk.
Forge 2120
Mods Listed in Crash Report:

• Streams v0.2.1
• Farseek v1.1
• RTG v4.1.1.7
• Pam's HarvestCraft v1.10.2h
• Mob Hunter v0.1.7
• Agricultural Revolution (Cooking Plus) v0.8.9

Other Terrain Mods:

• BOP v5.0.0.2093
• Custom Ore Gen v1.4.2
• SugiForest v1.2.2
• Mithwood Forest v1.03

This should be fixed in Streams 0.3/Farseek 2.0. Please give it a try and let me know of any issues, thanks!