Game crashes to desktop with an NPE during initialisation.

Mod version: 0.4.0-pre1
Forge version: 1.11-13.19.1.2188

Crash report: gist/crash-2016-12-11_20.56.23-client

I disabled OptiFine and now a new crash is occurring.
Crash report 2: gist/crash-2016-12-11_21.06.38-client

I can also confirm that this crash still occurs with FoamFix disabled.
I wasn't sure if that could cause any potential issues in this case.

The original crash with OptiFine installed happened out of the blue. I went for food, came back, launched the game, and it started crashing. I have yet to figure out why it randomly decided to misbehave but I'm looking into it.

The second crash was already fixed in 0.4.0-pre2 (to be released), and the first crash is... odd, but familiar and possibly related to OptiFine.

No need to test without FoamFix for this project, by the way. :)