fix(library/type_context): local instances were not being initialized
fix(library/type_context): local instances were not being initialized

dselsam/lean,avigad/lean,johoelzl/lean,leanprover-community/lean,soonhokong/lean-windows,Kha/lean,fpvandoorn/lean,leodemoura/lean,leanprover/lean,digama0/lean,Kha/lean,johoelzl/lean,johoelzl/lean,dselsam/lean,dselsam/lean,dselsam/lean,rlewis1988/lean,leodemoura/lean,leanprover/lean,Kha/lean,soonhokong/lean-osx,leodemoura/lean,soonhokong/lean-windows,soonhokong/lean-windows,soonhokong/lean-osx,leanprover-community/lean,fpvandoorn/lean,rlewis1988/lean,rlewis1988/lean,leanprover-community/lean,leanprover/lean,soonhokong/lean-osx,fgdorais/lean,digama0/lean,leanprover/lean,leodemoura/lean,fgdorais/lean,digama0/lean,avigad/lean,digama0/lean,digama0/lean,soonhokong/lean-windows,Kha/lean,avigad/lean,soonhokong/lean-windows,fgdorais/lean,rlewis1988/lean,dselsam/lean,leanprover/lean,rlewis1988/lean,fgdorais/lean,leodemoura/lean,avigad/lean,fpvandoorn/lean,leanprover/lean,avigad/lean,fgdorais/lean,leanprover-community/lean,soonhokong/lean-osx,johoelzl/lean,soonhokong/lean-osx,leanprover-community/lean,Kha/lean,avigad/lean,rlewis1988/lean,Kha/lean,leodemoura/lean,johoelzl/lean,fpvandoorn/lean,fpvandoorn/lean,leanprover-community/lean,fgdorais/lean,johoelzl/lean,fpvandoorn/lean,digama0/lean,dselsam/lean