functors: don't leak the bindings.
functors: don't leak the bindings.

factor/factor,nicolas-p/factor,factor/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,tgunr/factor,AlexIljin/factor,tgunr/factor,nicolas-p/factor,bjourne/factor,nicolas-p/factor,bpollack/factor,bpollack/factor,factor/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,nicolas-p/factor,nicolas-p/factor,factor/factor,mrjbq7/factor,tgunr/factor,AlexIljin/factor,tgunr/factor,bpollack/factor,AlexIljin/factor,bpollack/factor,bjourne/factor,bjourne/factor,bjourne/factor,mrjbq7/factor,mrjbq7/factor,bpollack/factor,AlexIljin/factor,bpollack/factor,nicolas-p/factor,mrjbq7/factor,AlexIljin/factor,AlexIljin/factor,nicolas-p/factor,bjourne/factor,factor/factor,bjourne/factor