diff --git a/cmd/torrent-create/main.go b/cmd/torrent-create/main.go
index 3f80a928..0a877c25 100644
--- a/cmd/torrent-create/main.go
+++ b/cmd/torrent-create/main.go
@@ -26,10 +26,10 @@ func init() {
 func main() {
 	b := torrent.Builder{}
 	for _, filename := range flag.Args() {
-		if _, err := os.Stat(filename); os.IsNotExist(err) {
-			log.Fatal(err)
-		}
 		if err := filepath.Walk(filename, func(path string, info os.FileInfo, err error) error {
+			if _, err := os.Stat(path); os.IsNotExist(err) {
+				return err
+			}
 			log.Print(path)
 			if info.IsDir() {
 				return nil
diff --git a/cmd/torrent-verify/main.go b/cmd/torrent-verify/main.go
index 061932e4..48fa8b6a 100644
--- a/cmd/torrent-verify/main.go
+++ b/cmd/torrent-verify/main.go
@@ -18,18 +18,9 @@ import (
 var (
 	torrentPath = flag.String("torrent", "/path/to/the.torrent", "path of the torrent file")
 	dataPath    = flag.String("path", "/torrent/data", "path of the torrent data")
-	summary     = flag.Bool("summary", false, "display summary at the end")
 )
 
-func verifySummary(sMap map[bool][]int) {
-	fmt.Println("----------------")
-	fmt.Println(" TORRENT-VERIFY ")
-	fmt.Println("----------------")
-	fmt.Printf("Number of correct pieces: %d\n", len(sMap[true]))
-	fmt.Printf("Number of wrong pieces: %d\n", len(sMap[false]))
-}
-
-func fileToMmap(filename string, length int64, devZero *os.File, mMapSpan *mmap_span.MMapSpan) {
+func fileToMmap(filename string, length int64, devZero *os.File) gommap.MMap {
 	osFile, err := os.Open(filename)
 	if err != nil {
 		log.Fatal(err)
@@ -43,12 +34,12 @@ func fileToMmap(filename string, length int64, devZero *os.File, mMapSpan *mmap_
 		log.Printf("file mmap has wrong size: %#v", filename)
 	}
 	osFile.Close()
-	mMapSpan.Append(goMMap)
+
+	return goMMap
 }
 
 func main() {
 	flag.Parse()
-	summaryMap := make(map[bool][]int)
 	metaInfo, err := metainfo.LoadFromFile(*torrentPath)
 	if err != nil {
 		log.Fatal(err)
@@ -62,15 +53,16 @@ func main() {
 	if len(metaInfo.Info.Files) > 0 {
 		for _, file := range metaInfo.Info.Files {
 			filename := filepath.Join(append([]string{*dataPath, metaInfo.Info.Name}, file.Path...)...)
-			fileToMmap(filename, file.Length, devZero, mMapSpan)
+			goMMap := fileToMmap(filename, file.Length, devZero)
+			mMapSpan.Append(goMMap)
 		}
 		log.Println(len(metaInfo.Info.Files))
 	} else {
-		fileToMmap(*dataPath, metaInfo.Info.Length, devZero, mMapSpan)
+		goMMap := fileToMmap(*dataPath, metaInfo.Info.Length, devZero)
+		mMapSpan.Append(goMMap)
 	}
 	log.Println(mMapSpan.Size())
 	log.Println(len(metaInfo.Info.Pieces))
-	var pieceValid bool
 	for piece := 0; piece < (len(metaInfo.Info.Pieces)+sha1.Size-1)/sha1.Size; piece++ {
 		expectedHash := metaInfo.Info.Pieces[sha1.Size*piece : sha1.Size*(piece+1)]
 		if len(expectedHash) == 0 {
@@ -81,11 +73,6 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
-		pieceValid = bytes.Equal(hash.Sum(nil), expectedHash)
-		summaryMap[pieceValid] = append(summaryMap[pieceValid], piece)
-		fmt.Println(piece, pieceValid)
-	}
-	if *summary {
-		verifySummary(summaryMap)
+		fmt.Println(piece, bytes.Equal(hash.Sum(nil), expectedHash))
 	}
 }
diff --git a/dht/dht.go b/dht/dht.go
index 116da78f..deb45e79 100644
--- a/dht/dht.go
+++ b/dht/dht.go
@@ -980,13 +980,11 @@ func bootstrapAddrs(nodeAddrs []string) (addrs []*net.UDPAddr, err error) {
 		}
 	}
 	for _, addrStr := range bootstrapNodes {
-		if addrStr != "" {
-			udpAddr, err := net.ResolveUDPAddr("udp4", addrStr)
-			if err != nil {
-				continue
-			}
-			addrs = append(addrs, udpAddr)
+		udpAddr, err := net.ResolveUDPAddr("udp4", addrStr)
+		if err != nil {
+			continue
 		}
+		addrs = append(addrs, udpAddr)
 	}
 	if len(addrs) == 0 {
 		err = errors.New("nothing resolved")