Issue #3334054: Add Error handling for \Drupal\package_manager\Stage::getIgnoredPaths

package_manager/src/Validator/LockFileValidator.php

@@ -101,6 +101,7 @@ final class LockFileValidator implements EventSubscriberInterface {
       $event->addError([
         $this->t('Could not hash the active lock file.'),
       ]);
+      $event->stopPropagation();
     }
   }
 
@@ -143,6 +144,7 @@ final class LockFileValidator implements EventSubscriberInterface {
     //   https://www.drupal.org/i/3247479.
     if (isset($error)) {
       $event->addError([$error]);
+      $event->stopPropagation();
     }
   }