code review 5639057: compress/gzip: NewWriter no longer returns an error.

src/pkg/crypto/rand/rand_test.go

 // 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.
 
 package rand
 
 import (
         "bytes"
         "compress/flate"
         "testing"
 )
 
 func TestRead(t *testing.T) {
         var n int = 4e6
         if testing.Short() {
                 n = 1e5
         }
         b := make([]byte, n)
         n, err := Read(b)
         if n != len(b) || err != nil {
                 t.Fatalf("Read(buf) = %d, %s", n, err)
         }
 
         var z bytes.Buffer
-        f := flate.NewWriter(&z, 5)
+        f, _ := flate.NewWriter(&z, 5)
         f.Write(b)
         f.Close()
         if z.Len() < len(b)*99/100 {
                 t.Fatalf("Compressed %d -> %d", len(b), z.Len())
         }
 }