golang bug421 代码
文件路径：/test/fixedbugs/bug421.go
/ errorcheck
/ Copyright 2012 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.
/ Issue 1927.
/ gccgo failed to issue the first error below.
package main
func main() {
println(int(1) == uint(1)) / ERROR "types"
var x int = 1
var y uint = 1
println(x == y) / ERROR "types"
}