Subversion Repositories openrisc

// $G $D/$F.go && $L $F.$A && ./$A.out

// Copyright 2010 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.

// Issue 1011.  Removing either #1 or #3 avoided the crash at #2.

package main

import (
        "io"
        "strings"
)

func readU16BE(b []byte) uint16 {
        b[0] = 0
        b[1] = 1
        return uint16(b[0])<<8 + uint16(b[1]) // #1
        n := uint16(b[0])<<8 + uint16(b[1])
        return n
}

func readStr(r io.Reader, b []byte) string {
        n := readU16BE(b)
        if int(n) > len(b) {
                return "err: n>b"
        }
        io.ReadFull(r, b[0:n]) // #2
        return string(b[0:n])  // #3
        return "ok"
}

func main() {
        br := strings.NewReader("abcd")
        readStr(br, make([]byte, 256))
}