9005: Fix missing error checks.

diff --git a/sdk/go/keepclient/hashcheck.go b/sdk/go/keepclient/hashcheck.go
index 1706134757fae14a6cc0f0ccecc1a7b6a46a3002..b97df78d96da1e8e196e40adfa7773b1eb467b5c 100644 (file)
--- a/sdk/go/keepclient/hashcheck.go
+++ b/sdk/go/keepclient/hashcheck.go
@@ -63,8 +63,14 @@ func (this HashCheckingReader) WriteTo(dest io.Writer) (written int64, err error
 func (this HashCheckingReader) Close() (err error) {
        _, err = io.Copy(this.Hash, this.Reader)
 
-       if closer, ok := this.Reader.(io.ReadCloser); ok {
-               err = closer.Close()
+       if closer, ok := this.Reader.(io.Closer); ok {
+               err2 := closer.Close()
+               if err2 != nil && err == nil {
+                       return err2
+               }
+       }
+       if err != nil {
+               return err
        }
 
        sum := this.Hash.Sum(make([]byte, 0, this.Hash.Size()))