Ticket #27365: 27365.diff.1

Index: wp-admin/includes/class-wp-upgrader.php
===================================================================
--- wp-admin/includes/class-wp-upgrader.php (revision 27527)
+++ wp-admin/includes/class-wp-upgrader.php (working copy)
@@ -628,7 +628,7 @@
                                )
                        ) );
 
-                       $results[$plugin] = $this->result;
+                       $results[$plugin] = $result;
 
                        // Prevent credentials auth screen from displaying multiple times
                        if ( false === $result )
@@ -1027,7 +1027,7 @@
                                ),
                        ) );
 
-                       $results[$theme] = $this->result;
+                       $results[$theme] = $result;
 
                        // Prevent credentials auth screen from displaying multiple times
                        if ( false === $result )
@@ -1202,7 +1202,12 @@
                if ( $update )
                        $update = array( $update );
                $results = $this->bulk_upgrade( $update, $args );
-               return $results[0];
+
+               if ( is_array( $results ) ) {
+                       return $results[0];
+               } else {
+                       return $results;
+               }
        }
 
        function bulk_upgrade( $language_updates = array(), $args = array() ) {
@@ -1283,7 +1288,7 @@
 
                        $result = $this->run( $options );
 
-                       $results[] = $this->result;
+                       $results[] = $result;
 
                        // Prevent credentials auth screen from displaying multiple times.
                        if ( false === $result )