diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index ac5d2c0..622339e 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -6,6 +6,7 @@
  */
 
 use Drupal\Component\Utility\NestedArray;
+use Drupal\Component\Utility\String;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Language\Language;
 use Drupal\Core\Template\Attribute;
@@ -977,7 +978,7 @@ function menu_item_route_access(Route $route, $href, &$map) {
     return FALSE;
   }
   catch (ResourceNotFoundException $e) {
-    return FALSE;
+    throw new ResourceNotFoundException(String::format("The route for '@href' could not be found", array('@href' => $href)));
   }
 
   // Populate the map with any matching values from the request.
diff --git a/core/modules/system/lib/Drupal/system/Tests/Routing/RouterPermissionTest.php b/core/modules/system/lib/Drupal/system/Tests/Routing/RouterPermissionTest.php
index 57d98be..5541b9f 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Routing/RouterPermissionTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Routing/RouterPermissionTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\system\Tests\Routing;
 
 use Drupal\simpletest\WebTestBase;
+use Symfony\Component\Routing\Exception\ResourceNotFoundException;
 
 /**
  * Basic tests for access permissions in routes.
@@ -36,11 +37,17 @@ public function testPermissionAccess() {
     $path = 'router_test/test7';
     $this->drupalGet($path);
     $this->assertResponse(403, "Access denied for a route where we don't have a permission");
-    // An invalid path should return a FALSE.
+    // An invalid path should throw an exception.
     $map = array();
     $route = \Drupal::service('router.route_provider')->getRouteByName('router_test_7');
-    $access = menu_item_route_access($route, $path . 'invalid', $map);
-    $this->assertFalse($access, 'Access denied');
+    try {
+      menu_item_route_access($route, $path . 'invalid', $map);
+      $exception = FALSE;
+    }
+    catch (ResourceNotFoundException $e) {
+      $exception = TRUE;
+    }
+    $this->assertTrue($exception, 'A ResourceNotFoundException was thrown while checking access for an invalid route.');
 
     $this->drupalGet('router_test/test8');
     $this->assertResponse(403, 'Access denied by default if no access specified');