golang issue24339 代码
文件路径：/test/fixedbugs/issue24339.go
/ errorcheck
/ Copyright 2018 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.
package p
/ Use a different line number for each token so we can
/ check that the error message appears at the correct
/ position.
var _ = struct{}{ /*line :20:1*/foo /*line :21:1*/: /*line :22:1*/0 }
/ ERROR "unknown field 'foo'"