Starting to reduce the union explosion problem
Starting to reduce the union explosion problem

nemerle/boomerang,TambourineReindeer/boomerang,nemerle/boomerang,nemerle/boomerang,TambourineReindeer/boomerang,TambourineReindeer/boomerang,nemerle/boomerang,TambourineReindeer/boomerang,xujun10110/boomerang,TambourineReindeer/boomerang,nemerle/boomerang,xujun10110/boomerang,nemerle/boomerang,nemerle/boomerang,xujun10110/boomerang,xujun10110/boomerang,xujun10110/boomerang,xujun10110/boomerang,TambourineReindeer/boomerang,nemerle/boomerang,xujun10110/boomerang,TambourineReindeer/boomerang,xujun10110/boomerang,TambourineReindeer/boomerang