golang unused 代码
文件路径：/src/cmd/vet/testdata/unused/unused.go
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This file contains tests for the unusedresult checker.
package unused
import "fmt"
func _() {
fmt.Errorf("") // ERROR "result of fmt.Errorf call not used"
}