Not sure if this is a bug or I'm not understanding the documentation. In
go/types/api.go:67:

"If Ident != nil, it is called for each identifier id in the AST"

I have a small program here (not runnable in playground because it depends on go/types):
http://play.golang.org/p/xfQXuF4i7w

It parses and type checks a small program defined as a literal string.

What is the expected output?

I would expect to see Ident called for Close at line 5.

What do you see instead?

Ident called for main at 1:9
Ident called for main at 3:6
Ident called for file at 4:3
Ident called for _ at 4:9
Ident called for os at 4:14
Ident called for Create at 4:17
Ident called for file at 5:3
Ident called for file at 5:3

Which compiler are you using (5g, 6g, 8g, gccgo)?
gc

Which operating system are you using?
OSX 10.8.4

Which version are you using?  (run 'go version')
go version go1.1 darwin/amd64