Ticket #37608: 37608.patch

src/wp-includes/class-wp-image-editor.php

@@ -376 +376 @@
                         $suffix = $this->get_suffix();
 
                 $info = pathinfo( $this->file );
-                $dir  = $info['dirname'];
-                $ext  = $info['extension'];
+                $dir  = pathinfo( $this->file, PATHINFO_DIRNAME );
+                $ext  = pathinfo( $this->file, PATHINFO_EXTENSION );
 
                 $name = wp_basename( $this->file, ".$ext" );
                 $new_ext = strtolower( $extension ? $extension : $ext );