Ticket #52196: 52196.diff

src/wp-includes/post.php

@@ -6088 +6088 @@
 function wp_get_attachment_metadata( $attachment_id = 0, $unfiltered = false ) {
         $attachment_id = (int) $attachment_id;
 
+        if ( ! $attachment_id ) {
+                $post = get_post();
+
+                if ( ! $post ) {
+                        return false;
+                }
+
+                $attachment_id = $post->ID;
+        }
+
         $data = get_post_meta( $attachment_id, '_wp_attachment_metadata', true );
 
         if ( ! $data ) {