Ticket #27565: 27565.2.diff

src/wp-includes/default-widgets.php

@@ -793 +793 @@
          * @param array $instance
          */
         public function widget( $args, $instance ) {
-                $cache = array();
+                $cache     = array();
+                $cache_key = 'widget_recent_posts_' . ( is_ssl() ? 'https' : 'http' );
+
                 if ( ! $this->is_preview() ) {
-                        $cache = wp_cache_get( 'widget_recent_posts', 'widget' );
+                        $cache = wp_cache_get( $cache_key, 'widget' );
                 }
 
                 if ( ! is_array( $cache ) ) {
@@ -864 +866 @@
 
                 if ( ! $this->is_preview() ) {
                         $cache[ $args['widget_id'] ] = ob_get_flush();
-                        wp_cache_set( 'widget_recent_posts', $cache, 'widget' );
+                        wp_cache_set( $cache_key, $cache, 'widget' );
                 } else {
                         ob_end_flush();
                 }
@@ -893 +895 @@
          * @access public
          */
         public function flush_widget_cache() {
-                wp_cache_delete('widget_recent_posts', 'widget');
+                wp_cache_delete( 'widget_recent_posts_http',  'widget' );
+                wp_cache_delete( 'widget_recent_posts_https', 'widget' );
         }
 
         /**