added errors to blacklist

jwt.go

@@ -143,8 +143,7 @@ func (jwt *JWT) Invalidate(t *Token) error {
 	if !hmac.Equal(jwt.sum(t.Data(), h), t.RawSig()) {
 		return ErrInvalid
 	}
-	jwt.blacklist.Add(t.Sig(), exp)
-	return nil
+	return jwt.blacklist.Add(t.Sig(), exp)
 }
 
 // blacklisted checks if a token is blacklisted
@@ -169,7 +168,11 @@ func (jwt *JWT) clean() {
 			return
 		}
 		now := Now()
-		for k, v := range jwt.blacklist.Map() {
+		m, err := jwt.blacklist.Map()
+		if err != nil {
+			continue
+		}
+		for k, v := range m {
 			if now > v {
 				jwt.blacklist.Remove(k)
 			}