commit 1f939e0e5cb57d05ebe0c8277755f83610fa9749
from: Stephen J Day <stephen.day@docker.com>
date: Wed May 18 23:12:42 2016 UTC

errors: return errors rather than nil

Signed-off-by: Stephen J Day <stephen.day@docker.com>

commit - e4e59ce7912b9968a48881a7764fc501de667cd4
commit + 1f939e0e5cb57d05ebe0c8277755f83610fa9749
blob - cb6ebe7cd74d71083ec3ea88dcfb7f188e214b89
blob + bbfee97f541e3e8208f8c2f561391daf7ecbf8be
--- channel.go
+++ channel.go
@@ -227,7 +227,7 @@ func readmsg(rd io.Reader, p []byte) (n int, err error
 func sendmsg(wr io.Writer, p []byte) error {
 	size := uint32(len(p) + 4) // message size plus 4-bytes for size.
 	if err := binary.Write(wr, binary.LittleEndian, size); err != nil {
-		return nil
+		return err
 	}
 
 	// This assume partial writes to wr aren't possible. Not sure if this
blob - dce55d38b491766bba623e40556dbc31a5a04248
blob + 920bfafaf141a4676e179f09535874586495d5f9
--- client.go
+++ client.go
@@ -48,7 +48,7 @@ func (c *client) Auth(ctx context.Context, afid Fid, u
 
 	resp, err := c.transport.send(ctx, m)
 	if err != nil {
-		return Qid{}, nil
+		return Qid{}, err
 	}
 
 	rauth, ok := resp.(MessageRauth)