Fix access to invalid symbol in Special:Userrights

Change-Id: Ibfc9f4f5e3b24dc3945e00dcfaecf5fdb4078acb

diff --git a/includes/specials/SpecialUserrights.php b/includes/specials/SpecialUserrights.php
index b06ef97..7351c33 100644 (file)
--- a/includes/specials/SpecialUserrights.php
+++ b/includes/specials/SpecialUserrights.php
@@ -473,7 +473,12 @@ class UserrightsPage extends SpecialPage {
                                        $this->mFetchedUser === null ? array( 'autofocus' => '' ) : array()
                                )
                        ) . ' ' .
-                       Xml::submitButton( $this->msg( 'editusergroup', $user->getName() )->text() ) .
+                       Xml::submitButton(
+                               $this->msg(
+                                       'editusergroup',
+                                       $this->mFetchedUser === null ? '[]' : $this->mFetchedUser->getName()
+                               )->text()
+                       ) .
                        Html::closeElement( 'fieldset' ) .
                        Html::closeElement( 'form' ) . "\n"
                );