Index: class-wp-upgrader.php
===================================================================
--- class-wp-upgrader.php	(revision 32291)
+++ class-wp-upgrader.php	(working copy)
@@ -893,7 +893,7 @@
 
 			$this->skin->plugin_active = is_plugin_active($plugin);
 
-			$result = $this->run( array(
+			$this->result = $this->run( array(
 				'package' => $r->package,
 				'destination' => WP_PLUGIN_DIR,
 				'clear_destination' => true,