diff --git a/core/lib/Drupal/Component/Utility/UrlHelper.php b/core/lib/Drupal/Component/Utility/UrlHelper.php
index b86eb46..0c0e07d 100644
--- a/core/lib/Drupal/Component/Utility/UrlHelper.php
+++ b/core/lib/Drupal/Component/Utility/UrlHelper.php
@@ -152,6 +152,7 @@ public static function parse($url) {
       // Split off everything before the query string into 'path'.
       $parts = explode('?', $url);
 
+      // Don't support URLs without a path, like 'http://'.
       list(, $path) = explode('://', $parts[0], 2);
       if ($path != '') {
         $options['path'] = $parts[0];
diff --git a/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php b/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php
index f9b6261..ff1792b 100644
--- a/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php
+++ b/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php
@@ -94,7 +94,7 @@ public function checkAccess(array $tree) {
    *   TRUE if the current user can access the link, FALSE otherwise.
    */
   protected function menuLinkCheckAccess(MenuLinkInterface $instance) {
-    if ($this->account->hasPermission(PathValidator::LINK_PERMISSION)) {
+    if ($this->account->hasPermission('link to any page')) {
       return TRUE;
     }
     // Use the definition here since that's a lot faster than creating a Url
diff --git a/core/lib/Drupal/Core/Path/PathValidator.php b/core/lib/Drupal/Core/Path/PathValidator.php
index 540b161..b6c3a5a 100644
--- a/core/lib/Drupal/Core/Path/PathValidator.php
+++ b/core/lib/Drupal/Core/Path/PathValidator.php
@@ -52,8 +52,6 @@ class PathValidator implements PathValidatorInterface {
    */
   protected $pathProcessor;
 
-  const LINK_PERMISSION = 'link to any page';
-
   /**
    * Creates a new PathValidator.
    *
@@ -129,7 +127,7 @@ public function getUrlIfValid($path) {
    *   An array of request attributes of FALSE if an exception was thrown.
    */
   protected function getPathAttributes($path, Request $request) {
-    if ($this->account->hasPermission(static::LINK_PERMISSION)) {
+    if ($this->account->hasPermission('link to any page')) {
       $router = $this->accessUnawareRouter;
     }
     else {
diff --git a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
index fbe15b3..acb63e8 100644
--- a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
@@ -209,7 +209,7 @@ public function massageFormValues(array $values, array $form, FormStateInterface
 
         // Reset the URL value to contain only the path.
         if (!$url->isExternal() && $this->supportsInternalLinks()) {
-          $value['url'] = substr($url->toString(), strlen($GLOBALS['base_path']));
+          $value['url'] = ltrim($url->toString(), \Drupal::request()->getBaseUrl() . '/');
         }
       }
     }
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 1ef55cf..c87b768 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -262,7 +262,8 @@ function system_permission() {
       'restrict access' => TRUE,
     ),
     'link to any page' => [
-      'title' => t('This allows to bypass access checking when linking to internal paths.'),
+      'title' => t('Link to any page'),
+      'description' => t('This allows to bypass access checking when linking to internal paths.'),
       'restrict access' => TRUE,
     ],
   );