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/usr/share/go-1.8/test/fixedbugs/issue15252.go is in golang-1.8-src 1.8.3-2ubuntu1.

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// run

// Copyright 2016 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.

// This test makes sure that we use all 64 bits of an
// index, even on 32 bit machines.  It also tests that nacl
// can compile 64 bit indexes loaded from ODOTPTR properly.

package main

type T struct {
	i int64
}

func f(t *T) byte {
	b := [2]byte{3, 4}
	return b[t.i]
}

func main() {
	t := &T{0x100000001}
	defer func() {
		r := recover()
		if r == nil {
			panic("panic wasn't recoverable")
		}
	}()
	f(t)
	panic("index didn't panic")
}