fix closure based console commands

src/Illuminate/Foundation/Console/Kernel.php

@@ -43,6 +43,13 @@ class Kernel implements KernelContract
      */
     protected $commands = [];
 
+    /**
+     * Indicates if the Closure commands have been loaded.
+     *
+     * @var bool
+     */
+    protected $commandsLoaded = false;
+
     /**
      * The bootstrap classes for the application.
      *
@@ -77,8 +84,6 @@ public function __construct(Application $app, Dispatcher $events)
 
         $this->app->booted(function () {
             $this->defineConsoleSchedule();
-
-            $this->commands();
         });
     }
 
@@ -108,6 +113,12 @@ public function handle($input, $output = null)
         try {
             $this->bootstrap();
 
+            if (! $this->commandsLoaded) {
+                $this->commands();
+
+                $this->commandsLoaded = true;
+            }
+
             return $this->getArtisan()->run($input, $output);
         } catch (Exception $e) {
             $this->reportException($e);