What version of Go are you using (go version)?

$ go version
tip, go playground.

Does this issue reproduce with the latest release?

Yes.

What did you do?

Playground link: https://play.golang.org/p/llL2iikbJmd

package main

type T struct {
	GlobalName string
}
var t = T{Name: "foo"}

func (t T) Name() string {
	return t.GlobalName
}

(Note: the field is called GlobalName but the composite literal specifies the incorrect field Name, which is also a method).

What did you expect to see?

An error message telling me that I'm trying to declare a composite literal field which doesn't exist (or is a method, not a struct field).

What did you see instead?

prog.go:6:11: cannot use promoted field Name in struct literal of type T

This lead to some confusion - in my case because the name of the method (Name) was similar to the name of the field I was trying to declare (GlobalName). The issue occurred because a dependency I was using changed the Name field to GlobalName and introduced an accessor method called (T).Name(). So I was in a larger process of code repair.

The struct in question also had a number of embedded fields, so it took a moment before I found the root cause (that there was Name method defined far away).

See also #23609 which improved error messages for embedding but perhaps made things more confusing in this case.