$out .= " <sha1/>\n";
}
- Hooks::run( 'XmlDumpWriterWriteRevision', [ &$this, &$out, $row, $text ] );
+ // Avoid PHP 7.1 warning from passing $this by reference
+ $writer = $this;
+ Hooks::run( 'XmlDumpWriterWriteRevision', [ &$writer, &$out, $row, $text ] );
$out .= " </revision>\n";