swift

d9679c0a - [CSSimplify] Member ref decays into value witness for `next` in for-in

[CSSimplify] Member ref decays into value witness for `next` in for-in Reference to `$geneator.next` in for-in loop context needs to be treated as a reference to a witness of `IteratorProtocol#next` requirement, otherwise it could lead to problems with retroactive conformances.