Repro case:

package main

type e struct {
	error
}

func (*e) random() {}

func main() {
	var diags []error
	for _, err := range diags {
		handled := handle(err)
                handled.
	}
}

func handle(err error) *e {
	return &e{err}
}

The selector with no "Sel" field breaks parsing in the main function, causing the code below it to fail parsing. The handle function never gets registered as a function declaration. Moving the handle function above the main function causes this code to type-check as expected. This poses a problem for editor-integrated tools that need to work on broken code.