make sure revision uids are 0 in the xml if missing/0 in the db

Bug: T224221
Change-Id: Id9861866fd9e4d2fe8d151c9631403aa24b9a779

diff --git a/includes/export/XmlDumpWriter.php b/includes/export/XmlDumpWriter.php
index 39153cf..d3fd374 100644 (file)
--- a/includes/export/XmlDumpWriter.php
+++ b/includes/export/XmlDumpWriter.php
@@ -252,7 +252,8 @@ class XmlDumpWriter {
                if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_USER ) ) {
                        $out .= "      " . Xml::element( 'contributor', [ 'deleted' => 'deleted' ] ) . "\n";
                } else {
-                       $out .= $this->writeContributor( $row->rev_user, $row->rev_user_text );
+                       // empty values get written out as uid 0, see T224221
+                       $out .= $this->writeContributor( $row->rev_user ?: 0, $row->rev_user_text );
                }
 
                if ( isset( $row->rev_minor_edit ) && $row->rev_minor_edit ) {