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// $G $D/$F.go && $L $F.$A && ./$A.out

// Copyright 2011 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"

        "strings"

)

var t *struct {

        c chan int

}

var c chan int

func f() {

        select {

        case <-t.c:  // THIS IS LINE 22

                break

        case <-c:

                break

        }

}

func main() {

        defer func() {

                recover()

                for i := 0;; i++ {

                        pc, file, line, ok := runtime.Caller(i)

                        if !ok {

                                print("BUG: bug347: cannot find caller\n")

                                return

                        }

                        if !strings.Contains(file, "bug347.go") || runtime.FuncForPC(pc).Name() != "main.f" {

                                // walk past runtime frames

                                continue

                        }

                        if line != 22 {

                                print("BUG: bug347: panic at ", file, ":", line, " in ", runtime.FuncForPC(pc).Name(), "\n")

                        }

                        return

                }

        }()

        f()

}