diff --git a/balancer.go b/balancer.go
index c298ae91..36204995 100644
--- a/balancer.go
+++ b/balancer.go
@@ -158,7 +158,7 @@ type roundRobin struct {
 func (rr *roundRobin) watchAddrUpdates() error {
 	updates, err := rr.w.Next()
 	if err != nil {
-		grpclog.Println("grpc: the naming watcher stops working due to %v.", err)
+		grpclog.Printf("grpc: the naming watcher stops working due to %v.\n", err)
 		return err
 	}
 	rr.mu.Lock()
diff --git a/benchmark/worker/main.go b/benchmark/worker/main.go
index c8815b0e..17c52519 100644
--- a/benchmark/worker/main.go
+++ b/benchmark/worker/main.go
@@ -60,7 +60,7 @@ type byteBufCodec struct {
 func (byteBufCodec) Marshal(v interface{}) ([]byte, error) {
 	b, ok := v.(*[]byte)
 	if !ok {
-		return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte")
+		return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
 	}
 	return *b, nil
 }
@@ -68,7 +68,7 @@ func (byteBufCodec) Marshal(v interface{}) ([]byte, error) {
 func (byteBufCodec) Unmarshal(data []byte, v interface{}) error {
 	b, ok := v.(*[]byte)
 	if !ok {
-		return fmt.Errorf("failed to marshal: %v is not type of *[]byte")
+		return fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
 	}
 	*b = data
 	return nil
@@ -138,8 +138,6 @@ func (s *workerServer) RunServer(stream testpb.WorkerService_RunServerServer) er
 			return err
 		}
 	}
-
-	return nil
 }
 
 func (s *workerServer) RunClient(stream testpb.WorkerService_RunClientServer) error {
@@ -191,13 +189,11 @@ func (s *workerServer) RunClient(stream testpb.WorkerService_RunClientServer) er
 			return err
 		}
 	}
-
-	return nil
 }
 
 func (s *workerServer) CoreCount(ctx context.Context, in *testpb.CoreRequest) (*testpb.CoreResponse, error) {
 	grpclog.Printf("core count: %v", runtime.NumCPU())
-	return &testpb.CoreResponse{int32(runtime.NumCPU())}, nil
+	return &testpb.CoreResponse{Cores: int32(runtime.NumCPU())}, nil
 }
 
 func (s *workerServer) QuitWorker(ctx context.Context, in *testpb.Void) (*testpb.Void, error) {
diff --git a/examples/route_guide/client/client.go b/examples/route_guide/client/client.go
index f84352c8..02c04909 100644
--- a/examples/route_guide/client/client.go
+++ b/examples/route_guide/client/client.go
@@ -115,12 +115,12 @@ func runRecordRoute(client pb.RouteGuideClient) {
 // runRouteChat receives a sequence of route notes, while sending notes for various locations.
 func runRouteChat(client pb.RouteGuideClient) {
 	notes := []*pb.RouteNote{
-		{&pb.Point{0, 1}, "First message"},
-		{&pb.Point{0, 2}, "Second message"},
-		{&pb.Point{0, 3}, "Third message"},
-		{&pb.Point{0, 1}, "Fourth message"},
-		{&pb.Point{0, 2}, "Fifth message"},
-		{&pb.Point{0, 3}, "Sixth message"},
+		{&pb.Point{Latitude: 0, Longitude: 1}, "First message"},
+		{&pb.Point{Latitude: 0, Longitude: 2}, "Second message"},
+		{&pb.Point{Latitude: 0, Longitude: 3}, "Third message"},
+		{&pb.Point{Latitude: 0, Longitude: 1}, "Fourth message"},
+		{&pb.Point{Latitude: 0, Longitude: 2}, "Fifth message"},
+		{&pb.Point{Latitude: 0, Longitude: 3}, "Sixth message"},
 	}
 	stream, err := client.RouteChat(context.Background())
 	if err != nil {
@@ -192,7 +192,7 @@ func main() {
 	printFeature(client, &pb.Point{0, 0})
 
 	// Looking for features between 40, -75 and 42, -73.
-	printFeatures(client, &pb.Rectangle{&pb.Point{400000000, -750000000}, &pb.Point{420000000, -730000000}})
+	printFeatures(client, &pb.Rectangle{&pb.Point{Latitude: 400000000, Longitude: -750000000}, &pb.Point{Latitude: 420000000, Longitude: -730000000}})
 
 	// RecordRoute
 	runRecordRoute(client)
diff --git a/reflection/serverreflection.go b/reflection/serverreflection.go
index efc6bc88..b044a3a8 100644
--- a/reflection/serverreflection.go
+++ b/reflection/serverreflection.go
@@ -253,7 +253,7 @@ func (s *serverReflectionServer) fileDescEncodingContainingSymbol(name string) (
 		// Metadata not valid.
 		enc, ok := meta.([]byte)
 		if !ok {
-			return nil, fmt.Errorf("invalid file descriptor for symbol: %v")
+			return nil, fmt.Errorf("invalid file descriptor for symbol: %v", name)
 		}
 
 		fd, err = s.decodeFileDesc(enc)
diff --git a/stress/client/main.go b/stress/client/main.go
index bb665e98..4579aab4 100644
--- a/stress/client/main.go
+++ b/stress/client/main.go
@@ -162,7 +162,7 @@ func (s *server) GetAllGauges(in *metricspb.EmptyMessage, stream metricspb.Metri
 	defer s.mutex.RUnlock()
 
 	for name, gauge := range s.gauges {
-		if err := stream.Send(&metricspb.GaugeResponse{Name: name, Value: &metricspb.GaugeResponse_LongValue{gauge.get()}}); err != nil {
+		if err := stream.Send(&metricspb.GaugeResponse{Name: name, Value: &metricspb.GaugeResponse_LongValue{LongValue: gauge.get()}}); err != nil {
 			return err
 		}
 	}
@@ -175,7 +175,7 @@ func (s *server) GetGauge(ctx context.Context, in *metricspb.GaugeRequest) (*met
 	defer s.mutex.RUnlock()
 
 	if g, ok := s.gauges[in.Name]; ok {
-		return &metricspb.GaugeResponse{Name: in.Name, Value: &metricspb.GaugeResponse_LongValue{g.get()}}, nil
+		return &metricspb.GaugeResponse{Name: in.Name, Value: &metricspb.GaugeResponse_LongValue{LongValue: g.get()}}, nil
 	}
 	return nil, grpc.Errorf(codes.InvalidArgument, "gauge with name %s not found", in.Name)
 }
diff --git a/test/end2end_test.go b/test/end2end_test.go
index b539584b..cb71db9c 100644
--- a/test/end2end_test.go
+++ b/test/end2end_test.go
@@ -1887,7 +1887,7 @@ func testClientRequestBodyError_Cancel_StreamingInput(t *testing.T, e env) {
 			t.Fatal("timeout waiting for error")
 		}
 		if se, ok := got.(transport.StreamError); !ok || se.Code != codes.Canceled {
-			t.Errorf("error = %#v; want transport.StreamError with code Canceled")
+			t.Errorf("error = %#v; want transport.StreamError with code Canceled", got)
 		}
 	})
 }
diff --git a/transport/handler_server.go b/transport/handler_server.go
index 00d3855f..4b0d5252 100644
--- a/transport/handler_server.go
+++ b/transport/handler_server.go
@@ -312,7 +312,7 @@ func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream)) {
 		Addr: ht.RemoteAddr(),
 	}
 	if req.TLS != nil {
-		pr.AuthInfo = credentials.TLSInfo{*req.TLS}
+		pr.AuthInfo = credentials.TLSInfo{State: *req.TLS}
 	}
 	ctx = metadata.NewContext(ctx, ht.headerMD)
 	ctx = peer.NewContext(ctx, pr)
diff --git a/transport/http2_client.go b/transport/http2_client.go
index 227686d4..f66435fd 100644
--- a/transport/http2_client.go
+++ b/transport/http2_client.go
@@ -175,7 +175,10 @@ func newHTTP2Client(addr string, opts *ConnectOptions) (_ ClientTransport, err e
 		return nil, ConnectionErrorf("transport: preface mismatch, wrote %d bytes; want %d", n, len(clientPreface))
 	}
 	if initialWindowSize != defaultWindowSize {
-		err = t.framer.writeSettings(true, http2.Setting{http2.SettingInitialWindowSize, uint32(initialWindowSize)})
+		err = t.framer.writeSettings(true, http2.Setting{
+			ID:  http2.SettingInitialWindowSize,
+			Val: uint32(initialWindowSize),
+		})
 	} else {
 		err = t.framer.writeSettings(true)
 	}
diff --git a/transport/http2_server.go b/transport/http2_server.go
index 1c4d5852..cee15429 100644
--- a/transport/http2_server.go
+++ b/transport/http2_server.go
@@ -100,10 +100,15 @@ func newHTTP2Server(conn net.Conn, maxStreams uint32, authInfo credentials.AuthI
 	if maxStreams == 0 {
 		maxStreams = math.MaxUint32
 	} else {
-		settings = append(settings, http2.Setting{http2.SettingMaxConcurrentStreams, maxStreams})
+		settings = append(settings, http2.Setting{
+			ID:  http2.SettingMaxConcurrentStreams,
+			Val: maxStreams,
+		})
 	}
 	if initialWindowSize != defaultWindowSize {
-		settings = append(settings, http2.Setting{http2.SettingInitialWindowSize, uint32(initialWindowSize)})
+		settings = append(settings, http2.Setting{
+			ID:  http2.SettingInitialWindowSize,
+			Val: uint32(initialWindowSize)})
 	}
 	if err := framer.writeSettings(true, settings...); err != nil {
 		return nil, ConnectionErrorf("transport: %v", err)
diff --git a/transport/transport_test.go b/transport/transport_test.go
index 6ebec452..ce015da2 100644
--- a/transport/transport_test.go
+++ b/transport/transport_test.go
@@ -370,7 +370,7 @@ func TestGracefulClose(t *testing.T) {
 		go func() {
 			defer wg.Done()
 			if _, err := ct.NewStream(context.Background(), callHdr); err != ErrConnClosing {
-				t.Errorf("%v.NewStream(_, _) = _, %v, want _, %v", err, ErrConnClosing)
+				t.Errorf("%v.NewStream(_, _) = _, %v, want _, %v", ct, err, ErrConnClosing)
 			}
 		}()
 	}