Ports Route::flushController (#44393)

src/Illuminate/Routing/Route.php

@@ -299,6 +299,16 @@ protected function parseControllerCallback()
         return Str::parseCallback($this->action['uses']);
     }
 
+    /**
+     * Flush the cached container instance on the route.
+     *
+     * @return void
+     */
+    public function flushController()
+    {
+        $this->controller = null;
+    }
+
     /**
      * Determine if the route matches a given request.
      *

tests/Routing/RoutingRouteTest.php

@@ -1763,6 +1763,25 @@ public function testResponseIsReturned()
         $this->assertNotInstanceOf(JsonResponse::class, $response);
     }
 
+    public function testRouteFlushController()
+    {
+        $container = new Container;
+        $router = $this->getRouter();
+
+        $router->get('count', ActionCountStub::class);
+        $request = Request::create('count', 'GET');
+
+        $response = $router->dispatch($request);
+        $this->assertSame(1, (int) $response->getContent());
+
+        $response = $router->dispatch($request);
+        $this->assertSame(2, (int) $response->getContent());
+
+        $request->route()->flushController();
+        $response = $router->dispatch($request);
+        $this->assertSame(1, (int) $response->getContent());
+    }
+
     public function testJsonResponseIsReturned()
     {
         $router = $this->getRouter();
@@ -2304,6 +2323,18 @@ public function __invoke()
     }
 }
 
+class ActionCountStub
+{
+    protected $count = 0;
+
+    public function __invoke()
+    {
+        $this->count++;
+
+        return $this->count;
+    }
+}
+
 interface ExampleMiddlewareContract
 {
     //