package testdata import ( "io" "os" ) func Govet() error { return &os.PathError{"first", "path", os.ErrNotExist} // ERROR "os.PathError composite literal uses unkeyed fields" } func GovetShadow(f io.Reader, buf []byte) (err error) { if f != nil { _, err := f.Read(buf) // ERROR "declaration of .err. shadows declaration at testdata/with_issues/govet.go:\d+" if err != nil { return err } } // Use variable to trigger shadowing error _ = err return }