better handling of undefined task methods

laravel/cli/command.php

@@ -42,8 +42,15 @@ class Command {
 			throw new \Exception("Sorry, I can't find that task.");
 		}
 
+		if(method_exists($task, $method))
+		{
 			$task->$method(array_slice($arguments, 1));
 		}
+		else
+		{
+			throw new \Exception("Sorry, I can't find that method!");
+		}
+	}
 
 	/**
 	 * Determine if the given command arguments are valid.