use the correct returnType in closure thunks, and infer the returnType even when there are no arguments!
use the correct returnType in closure thunks, and infer the returnType even when there are no arguments!

ds84182/rock,ooc-lang/rock,marcusnaslund/rock,shamanas/rock,thomasfanell/rock,ds84182/rock,jonathanudd/rock,fasterthanlime/rock,kirbyfan64/rock,shamanas/rock,fasterthanlime/rock,cogneco/rock,fredrikbryntesson/rock,cogneco/rock,jonathanudd/rock,zhaihj/rock,davidhesselbom/rock,magic-lang/rock,davidhesselbom/rock,ooc-lang/rock,magic-lang/rock,marcusnaslund/rock,zhaihj/rock,thomasfanell/rock,kirbyfan64/rock,fredrikbryntesson/rock