Issue #3106659 by phenaproxima, aleevas, rajanvalecha12, Drupaldev2013, audacus, mulukallaarun, Kristen Pol, dpi: Media types with missing source fields break the status report page

core/modules/media/media.install

@@ -135,7 +135,7 @@ function media_requirements($phase) {
         ->getViewDisplay('media', $type->id());
 
       $source_field_definition = $type->getSource()->getSourceFieldDefinition($type);
-      if (!is_a($source_field_definition->getItemDefinition()->getClass(), ImageItem::class, TRUE)) {
+      if (empty($source_field_definition) || !is_a($source_field_definition->getItemDefinition()->getClass(), ImageItem::class, TRUE)) {
         continue;
       }
 

core/modules/media/tests/src/Functional/MediaRequirementsTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Drupal\Tests\media\Functional;
+
+/**
+ * Tests the Media module's requirements checks.
+ *
+ * @group media
+ */
+class MediaRequirementsTest extends MediaFunctionalTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
+  /**
+   * Tests that the requirements check can handle a missing source field.
+   */
+  public function testMissingSourceFieldDefinition() {
+    $media_type = $this->createMediaType('test');
+    /** @var \Drupal\field\FieldConfigInterface $field_definition */
+    $field_definition = $media_type->getSource()
+      ->getSourceFieldDefinition($media_type);
+    /** @var \Drupal\field\FieldStorageConfigInterface $field_storage_definition */
+    $field_storage_definition = $field_definition->getFieldStorageDefinition();
+    $field_definition->delete();
+    $field_storage_definition->delete();
+
+    $this->drupalLogin($this->rootUser);
+    $this->drupalGet('/admin/reports/status');
+    $this->assertSession()->statusCodeEquals(200);
+  }
+
+}