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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()
}