Allow closures to use method type parameters#815

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EliasC wants to merge 2 commits intoparapluu:developmentfrom

EliasC:fix/method-poly-closure

Commits on Jun 1, 2017

Allow closures to use method type parameters
EliasC
committed

Commits on Jun 2, 2017

Added missing type variables when building closure environment
EliasC
committed