Drupal field module fix for broken configuration sync page

drupal-core--LDP-2261-config-sync-1000x.patch

diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index ad9b8f538b..94493a0c3a 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -318,8 +318,11 @@ function field_form_config_admin_import_form_alter(&$form, FormStateInterface $f
   $user_input = $form_state->getUserInput();
   $storage_comparer = $form_state->get('storage_comparer');
   if ($storage_comparer && empty($user_input)) {
+    // Method getFieldStoragesToPurge expects first array parameter to have
+    // 'module' key.
+    $core_extension = $storage_comparer->getSourceStorage()->read('core.extension') ?: ['module' => []];
     $field_storages = ConfigImporterFieldPurger::getFieldStoragesToPurge(
-      $storage_comparer->getSourceStorage()->read('core.extension'),
+      $core_extension,
       $storage_comparer->getChangelist('delete')
     );
     if ($field_storages) {

drupal-core--LDP-2261-config.patch

From aee0a8e43761099b0e98f20e081b42e8762123e3 Mon Sep 17 00:00:00 2001
From: Lio Novelli <liopold@drunomics.com>
Date: Thu, 7 Sep 2023 18:13:35 +0200
Subject: [PATCH] Better handle array parameters in config importer field
 purger.

---
 core/modules/field/field.module                      | 3 +++
 core/modules/field/src/ConfigImporterFieldPurger.php | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index d5a8182048a6..b39d2fdb808f 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -318,6 +318,9 @@ function field_form_config_admin_import_form_alter(&$form, FormStateInterface $f
   $user_input = $form_state->getUserInput();
   $storage_comparer = $form_state->get('storage_comparer');
   if ($storage_comparer && empty($user_input)) {
+    // Method getFieldStoragesToPurge expects first array parameter to have
+    // 'module' key.
+    $core_extension = $storage_comparer->getSourceStorage()->read('core.extension') ?: ['module' => []];
     $field_storages = ConfigImporterFieldPurger::getFieldStoragesToPurge(
       $storage_comparer->getSourceStorage()->read('core.extension'),
       $storage_comparer->getChangelist('delete')
diff --git a/core/modules/field/src/ConfigImporterFieldPurger.php b/core/modules/field/src/ConfigImporterFieldPurger.php
index b2efb68d22dd..aaede369651d 100644
--- a/core/modules/field/src/ConfigImporterFieldPurger.php
+++ b/core/modules/field/src/ConfigImporterFieldPurger.php
@@ -109,7 +109,7 @@ protected static function initializeSandbox(array &$context, ConfigImporter $con
    *   synchronized.
    */
   public static function getFieldStoragesToPurge(array $extensions, array $deletes) {
-    $providers = array_keys($extensions['module']);
+    $providers = !empty($extensions['module']) ? array_keys($extensions['module']) : [];
     $providers[] = 'core';
     $storages_to_delete = [];
 
-- 
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