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      1 // run
      2 
      3 // Copyright 2011 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 // Issue 2206.  Incorrect sign extension of div arguments.
      8 
      9 package main
     10 
     11 func five(x int64) {
     12 	if x != 5 {
     13 		panic(x)
     14 	}
     15 }
     16 
     17 func main() {
     18        // 5
     19        five(int64(5 / (5 / 3)))
     20 
     21        // 5
     22        five(int64(byte(5) / (byte(5) / byte(3))))
     23 
     24        // 5
     25        var a, b byte = 5, 3
     26        five(int64(a / (a / b)))
     27        
     28        // integer divide by zero in golang.org sandbox
     29        // 0 on windows/amd64
     30        x := [3]byte{2, 3, 5}
     31        five(int64(x[2] / (x[2] / x[1])))
     32 
     33        // integer divide by zero in golang.org sandbox
     34        // crash on windows/amd64
     35        y := x[1:3]
     36        five(int64(y[1] / (y[1] / y[0])))
     37 }