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go/test/fixedbugs/bug199.go
Russ Cox 6e8524be18 array index bug
x[i]
x not addressable, i >= UINF
double evaluated i
second eval killed live registers

manifested as gob instability

R=ken
OCL=34097
CL=34099
2009-08-30 18:47:48 -07:00

26 lines
413 B
Go

// $G $D/$F.go && $L $F.$A && ./$A.out
// Copyright 2009 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
type S struct {
a []int;
}
var s = &S{make([]int, 10)}
func main() {
s.a[f()] = 1 // 6g used to call f twice here
}
var n int
func f() int{
if n++; n > 1 {
panicln("f twice");
}
return 0
}