Update:Fixed hosts error

src/Application.php

@@ -445,7 +445,7 @@ class Application
         }
         //如果设置了host的话，看host对应的controller路径
         $hosts = $this->appConfigure('hosts');
-        if (count($hosts) > 0) {
+        if (!empty($hosts) && is_array($hosts) && count($hosts) > 0) {
             foreach ($hosts AS $host) {
                 if ($host['domain'] == $this->request->host) {
                     Register::set(