A fix for the loop variable closure problem is now in the official proposal process, which is how language changes happen in Go.

It’s a concrete proposal from the core Go team and seems to be on track for acceptance:

https://github.com/golang/go/issues/60078

An implementation is already available on tip and in the upcoming Go 1.21 release behind a GOEXPERIMENT flag.

The community reaction has been extremely positive. As one approximate measure, an earlier draft of the proposal had 671 upvotes and with 0 downvotes:

https://github.com/golang/go/discussions/56010