Ticket #29920: 29920.diff

wp-admin/includes/post.php

@@ -1532 +1532 @@
                 // If the new autosave has the same content as the post, delete the autosave.
                 $post = get_post( $post_id );
                 $autosave_is_different = false;
+
                 foreach ( array_intersect( array_keys( $new_autosave ), array_keys( _wp_post_revision_fields() ) ) as $field ) {
-                        if ( normalize_whitespace( $new_autosave[ $field ] ) != normalize_whitespace( $post->$field ) ) {
-                                $autosave_is_different = true;
-                                break;
+
+                        if ( is_string( $new_autosave[ $field ] ) && is_string( $post->$field ) ) {
+                                if ( normalize_whitespace( $new_autosave[ $field ] ) != normalize_whitespace( $post->$field ) ) {
+                                        $autosave_is_different = true;
+                                        break;
+                                }
+                        } else {
+                                if ( $new_autosave[ $field ] != $post->$field ) {
+                                        $autosave_is_different = true;
+                                        break;
+                                }
                         }
+
                 }
 
+
                 if ( ! $autosave_is_different ) {
                         wp_delete_post_revision( $old_autosave->ID );
                         return 0;