go/types: dot imports might cause errors where (types.Error).Pos is not part of the (types.Error).Fset #71272
Description
Reproducer:
package main
import (
"fmt"
"go/ast"
"go/importer"
"go/parser"
"go/token"
"go/types"
)
func main() {
fmt.Println(run())
}
const src = `package main
import . "net/http"
type Request struct{}
`
func run() error {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "test.go", src, parser.SkipObjectResolution)
if err != nil {
return err
}
cfg := types.Config{
Importer: importer.Default(),
Error: func(err error) {
e := err.(types.Error)
fmt.Println(e.Msg, e.Pos, e.Fset.Position(e.Pos))
},
}
cfg.Check("test", fset, []*ast.File{f}, nil)
return nil
}$ go run .
Request already declared through dot-import of package http ("net/http") 41 test.go:5:6
other declaration of Request 2883740 -
"net/http" imported and not used 22 test.go:3:8
<nil>Note the second error other declaration of Request 2883740 -, which tries to reference the file in the net/http package.