io/ioutil: Fix dropped test error

Change-Id: I9cfaba4f1af23ab67627bf496739311e4d1984c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/205245
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/io/ioutil/ioutil_test.go b/src/io/ioutil/ioutil_test.go
index 4945c65445d2141c86a9ff9378d4d81e7922bcc9..ef3c6d7975eeb21ccdf50390cc4e7d381f726258 100644 (file)
--- a/src/io/ioutil/ioutil_test.go
+++ b/src/io/ioutil/ioutil_test.go
@@ -72,6 +72,9 @@ func TestReadOnlyWriteFile(t *testing.T) {
 
        // We don't want to use TempFile directly, since that opens a file for us as 0600.
        tempDir, err := TempDir("", t.Name())
+       if err != nil {
+               t.Fatalf("TempDir %s: %v", t.Name(), err)
+       }
        defer os.RemoveAll(tempDir)
        filename := filepath.Join(tempDir, "blurp.txt")