Ticket #35237: 35237.2.diff

src/wp-includes/embed-template.php

@@ -50 +50 @@
                         $image_size   = 'full'; // Fallback.
 
                         $meta = wp_get_attachment_metadata( $thumbnail_id );
-                        if ( is_array( $meta ) ) {
+                        if ( ! empty( $meta['sizes'] ) ) {
                                 foreach ( $meta['sizes'] as $size => $data ) {
                                         if ( $data['width'] / $data['height'] > $aspect_ratio ) {
                                                 $aspect_ratio = $data['width'] / $data['height'];