Golang程序  |  21行  |  434 B

// errorcheck

// 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 main

import . "unsafe"	// ERROR "not used"

func main() {
	var x int
	println(unsafe.Sizeof(x)) // ERROR "undefined"
}

/*
After a '.' import, "unsafe" shouldn't be defined as
an identifier. 6g complains correctly for imports other
than "unsafe".
*/