Ticket #30369: 30369.patch

src/wp-includes/update.php

@@ -648 +648 @@
         }
 }
 
+/**
+ * Clear existing update caches for plugins, themes, and core.
+ *
+ * @since 4.1.0
+ */
+function _clear_update_transients() {
+        wp_clean_plugins_cache();
+        wp_clean_themes_cache();
+        delete_site_transient( 'update_core' );
+}
+
 if ( ( ! is_main_site() && ! is_network_admin() ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) )
         return;
 
@@ -662 +673 @@
 add_action( 'wp_update_plugins', 'wp_update_plugins' );
 add_action( 'upgrader_process_complete', 'wp_update_plugins', 10, 0 );
 
+add_action( 'update_option_WPLANG', '_clear_update_transients' , 10, 0 );
+
 add_action( 'load-themes.php', 'wp_update_themes' );
 add_action( 'load-update.php', 'wp_update_themes' );
 add_action( 'load-update-core.php', 'wp_update_themes' );