golang bug 代码
文件路径：/test/fixedbugs/issue5125.dir/bug.go
// Copyright 2013 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 bug
type Node interface {
Eval(s *Scene)
}
type plug struct {
node Node
}
type Scene struct {
changed map[plug]bool
}