gcc/testsuite/go.test/test/fixedbugs/bug206.go

   1 // $G $D/$F.go && $L $F.$A && ./$A.out >/dev/null 2>&1 || echo BUG: bug206
   2
   3 // Copyright 2009 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 "go/ast";
  10
  11 func g(list []ast.Expr) {
  12         n := len(list)-1;
  13         println(list[n].Pos().Line);
  14 }
  15
  16
  17 // f is the same as g except that the expression assigned to n is inlined.
  18 func f(list []ast.Expr) {
  19         // n := len(list)-1;
  20         println(list[len(list)-1 /* n */].Pos().Line);
  21 }
  22
  23
  24 func main() {
  25         list := []ast.Expr{&ast.Ident{}};
  26         g(list);  // this works
  27         f(list);  // this doesn't
  28 }
  29
  30
  31 /*
  32 0
  33 throw: index out of range
  34
  35 panic PC=0x2bcf10
  36 throw+0x33 /home/gri/go/src/pkg/runtime/runtime.c:71
  37         throw(0x470f8, 0x0)
  38 sys·throwindex+0x1c /home/gri/go/src/pkg/runtime/runtime.c:45
  39         sys·throwindex()
  40 main·f+0x26 /home/gri/go/test/bugs/bug206.go:16
  41         main·f(0x2b9560, 0x0)
  42 main·main+0xc3 /home/gri/go/test/bugs/bug206.go:23
  43         main·main()
  44 mainstart+0xf /home/gri/go/src/pkg/runtime/amd64/asm.s:55
  45         mainstart()
  46 goexit /home/gri/go/src/pkg/runtime/proc.c:133
  47         goexit()
  48 */