golang issue23781 代码
文件路径：/test/fixedbugs/issue23781.go
/ +build amd64
/ compile
/ Copyright 2009 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
var _ = []int{1 << 31: 1} / ok on machines with 64bit int