post review update

call.go

@@ -87,7 +87,7 @@ func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTran
 	}
 	c.trailerMD = stream.Trailer()
 	if peer, ok := peer.FromContext(stream.Context()); ok {
-		c.peer = *peer
+		c.peer = peer
 	}
 	return nil
 }

rpc_util.go

@@ -141,7 +141,7 @@ type callInfo struct {
 	failFast  bool
 	headerMD  metadata.MD
 	trailerMD metadata.MD
-	peer      peer.Peer
+	peer      *peer.Peer
 	traceInfo traceInfo // in trace.go
 }
 
@@ -189,7 +189,7 @@ func Trailer(md *metadata.MD) CallOption {
 // unary RPC.
 func Peer(peer *peer.Peer) CallOption {
 	return afterCall(func(c *callInfo) {
-		*peer = c.peer
+		*peer = *c.peer
 	})
 }