From ba5b309131f20fd59b8f4c00f8df7e36fd6aac9e Mon Sep 17 00:00:00 2001
From: catch <catch@35733.no-reply.drupal.org>
Date: Wed, 23 Nov 2022 10:18:00 +0000
Subject: [PATCH] Issue #2925297 by Spokje, mpp, paulvandenburg, anmolgoyal74,
 gobinathm, catch, mmrares, shubhangi1995, Martijn de Wit: Fatal error on
 config form with translation enabled when config is missing

(cherry picked from commit d0ee369a05962eed22afcd49c765f1c56b77ead0)
---
 core/lib/Drupal/Core/Config/TypedConfigManager.php    |  8 ++++++++
 .../Drupal/KernelTests/Config/TypedConfigTest.php     | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/core/lib/Drupal/Core/Config/TypedConfigManager.php b/core/lib/Drupal/Core/Config/TypedConfigManager.php
index 8585f8399e7..06b81809258 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManager.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManager.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Core\Config;
 
+use Drupal\Component\Render\FormattableMarkup;
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Config\Schema\ConfigSchemaAlterException;
@@ -75,6 +76,13 @@ class TypedConfigManager extends TypedDataManager implements TypedConfigManagerI
    */
   public function get($name) {
     $data = $this->configStorage->read($name);
+    if ($data === FALSE) {
+      // For a typed config the data MUST exist.
+      $data = [];
+      trigger_error(new FormattableMarkup('Missing required data for typed configuration: @config', [
+        '@config' => $name,
+      ]), E_USER_ERROR);
+    }
     return $this->createFromNameAndData($name, $data);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php b/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php
index 7a40310b316..adba8b8e0b3 100644
--- a/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php
+++ b/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php
@@ -9,6 +9,7 @@ use Drupal\Core\TypedData\ComplexDataInterface;
 use Drupal\Core\TypedData\Type\IntegerInterface;
 use Drupal\Core\TypedData\Type\StringInterface;
 use Drupal\KernelTests\KernelTestBase;
+use PHPUnit\Framework\Error\Error;
 use Symfony\Component\Validator\ConstraintViolationListInterface;
 
 /**
@@ -38,6 +39,16 @@ class TypedConfigTest extends KernelTestBase {
   public function testTypedDataAPI() {
     /** @var \Drupal\Core\Config\TypedConfigManagerInterface $typed_config_manager */
     $typed_config_manager = \Drupal::service('config.typed');
+
+    // Test non-existent data.
+    try {
+      $typed_config_manager->get('config_test.non_existent');
+      $this->fail('Expected error when trying to get non-existent typed config.');
+    }
+    catch (Error $e) {
+      $this->assertEquals('Missing required data for typed configuration: config_test.non_existent', $e->getMessage());
+    }
+
     /** @var \Drupal\Core\Config\Schema\TypedConfigInterface $typed_config */
     $typed_config = $typed_config_manager->get('config_test.validation');