Some short lived variables are not collapsed.

[LexManos]

See 1.13's WorldServer init
SingleBiomeProvider.func_205004_a
BlockStateFlattenVillageCrops.func_210590_b
BlockStateFlattenGenOptions.func_209636_a

[JDLogic]

I figured out what is causing the rest of these. I'll update the patch tomorrow and make sure it doesn't cause any problems.

[LexManos]

Should be fixed by #15, I'l reopen if I see more cases.