Comment by aaronbee

Even more exciting, this is already present in go1.13. I believe the author of these slides made a mistake.

Here it is mentioned in go1.13 release notes: https://golang.org/doc/go1.13#compiler

And GitHub says the commit is present in go1.13: https://github.com/golang/go/commit/996a687ebbf81b26f81b41b8...