PHP Fatal error: Nesting level too deep - recursive dependency?

diff --git a/core/lib/Drupal/Core/Field/MapFieldItemList.php b/core/lib/Drupal/Core/Field/MapFieldItemList.php
index 2d86dae..6e3324d 100644
--- a/core/lib/Drupal/Core/Field/MapFieldItemList.php
+++ b/core/lib/Drupal/Core/Field/MapFieldItemList.php
@@ -28,7 +28,7 @@ public function equals(FieldItemListInterface $list_to_compare) {
$value1 = $this->getValue();
$value2 = $list_to_compare->getValue();
 
- return $value1 == $value2;
+ return $value1 === $value2;
}
 
}