Use inner iterator may_have_side_effect for Cloned
Use inner iterator may_have_side_effect for Cloned

Previous implementation wasn't correct, as an inner iterator
could have had side effects.

GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,graydon/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,graydon/rust,graydon/rust