Ticket #32363: 32363.patch

src/wp-includes/media.php

@@ -704 +704 @@
         }
         if ( $src && $width && $height )
                 return array( $src, $width, $height );
-        return false;
+        return apply_filters('wp_get_attachment_image_src_fallback', false, array($attachment_id, $size, $icon));
 }
 
 /**