[10.x] Route::getController() should return null when the accessi…

…ng (#49269)

closure based route

fixes #49267

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

src/Illuminate/Routing/Route.php

@@ -268,6 +268,10 @@ protected function runController()
      */
     public function getController()
     {
+        if (! $this->isControllerAction()) {
+            return null;
+        }
+
         if (! $this->controller) {
             $class = $this->getControllerClass();