go/types: named types defined within a function print as if defined at package scope

[adonovan]

package main
type T int
func f() {
        type T int
}

Both of these types are printed as "main.T".  This is ambiguous and confusing;
the f-local type should have a different name.  Not sure what 6g does.

[rsc]

Comment 2:

Labels changed: added go1.3maybe.

[rsc]

Comment 3:

Labels changed: added release-none, removed go1.3maybe.

[rsc]

Comment 4:

Labels changed: added repo-tools.

[adonovan]

Comment 5:

Here's a concrete suggestion: the local type should have name that is not a valid Go
identifier, e.g. main.T$1, where 1 is a sequence number for fresh identifiers.
For the record: gc and go/types behave the same:
% cat ~/5501.go 
package main
import "fmt"
type T int
var outer T
func main() {
    type T int
    var inner T
    fmt.Printf("%T %T\n", outer, inner)
}
% go run ~/5501.go 
main.T main.T
% ./ssadump -run ~/5501.go 
main.T main.T