test/fixedbugs/bug347.go

   1 // run
   2
   3 // Copyright 2011 The Go Authors.  All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 package main
   8
   9 import (
  10         "runtime"
  11         "strings"
  12 )
  13
  14 var t *struct {
  15         c chan int
  16 }
  17
  18 var c chan int
  19
  20 func f() {
  21         select {
  22         case <-t.c:  // THIS IS LINE 22
  23                 break
  24         case <-c:
  25                 break
  26         }
  27 }
  28
  29 func main() {
  30         defer func() {
  31                 recover()
  32                 for i := 0;; i++ {
  33                         pc, file, line, ok := runtime.Caller(i)
  34                         if !ok {
  35                                 print("BUG: bug347: cannot find caller\n")
  36                                 return
  37                         }
  38                         if !strings.Contains(file, "bug347.go") || runtime.FuncForPC(pc).Name() != "main.f" {
  39                                 // walk past runtime frames
  40                                 continue
  41                         }
  42                         if line != 22 {
  43                                 print("BUG: bug347: panic at ", file, ":", line, " in ", runtime.FuncForPC(pc).Name(), "\n")
  44                         }
  45                         return
  46                 }
  47         }()
  48         f()
  49 }