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      // run
// 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 main
import "runtime"
type Closer interface {
	Close()
}
func nilInterfaceDeferCall() {
	defer func() {
		// make sure a traceback happens with jmpdefer on the stack
		runtime.GC()
	}()
	var x Closer
	defer x.Close()
}
func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {
			panic("did not panic")
		}
	}()
	f()
}
func main() {
	shouldPanic(nilInterfaceDeferCall)
}
 
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