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// run
// Copyright 2018 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 "strings"
var X interface{}
type T struct{}
func scopes() {
p, ok := recover().(error)
if ok && strings.Contains(p.Error(), "different scopes") {
return
}
panic(p)
}
func F1() {
type T struct{}
X = T{}
}
func F2() {
type T struct{}
defer scopes()
_ = X.(T)
}
func F3() {
defer scopes()
_ = X.(T)
}
func F4() {
X = T{}
}
func main() {
F1() // set X to F1's T
F2() // check that X is not F2's T
F3() // check that X is not package T
F4() // set X to package T
F2() // check that X is not F2's T
}