golang issue30862 代码
文件路径：/test/fixedbugs/issue30862.go
/ runindir -goexperiment fieldtrack
/ Copyright 2019 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.
/ Test case for issue 30862. This test as written will
/ fail for the main 'gc' compiler unless GOEXPERIMENT=fieldtrack
/ is set when building it, whereas gccgo has field tracking
/ enabled by default (hence the build tag below).
package ignored