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      1 // run
      2 
      3 // Copyright 2012 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 	"fmt"
     11 	"runtime"
     12 	"strings"
     13 )
     14 
     15 type T struct {
     16 	val int
     17 }
     18 
     19 func main() {
     20 	defer expectError(22)
     21 	var pT *T
     22 	switch pT.val { // error should be here - line 22
     23 	case 0:
     24 		fmt.Println("0")
     25 	case 1: // used to show up here instead
     26 		fmt.Println("1")
     27 	case 2:
     28 		fmt.Println("2")
     29 	}
     30 	fmt.Println("finished")
     31 }
     32 
     33 func expectError(expectLine int) {
     34 	if recover() == nil {
     35 		panic("did not crash")
     36 	}
     37 	for i := 1;; i++ {
     38 		_, file, line, ok := runtime.Caller(i)
     39 		if !ok {
     40 			panic("cannot find issue4562.go on stack")
     41 		}
     42 		if strings.HasSuffix(file, "issue4562.go") {
     43 			if line != expectLine {
     44 				panic(fmt.Sprintf("crashed at line %d, wanted line %d", line, expectLine))
     45 			}
     46 			break
     47 		}
     48 	}
     49 }
     50