Install the MagicNoNumberedHeadings extension in MediaWiki 1.26. It crashes when you hit Special:Version with the error:
Fatal error: Cannot access private property ParserOptions::$mNumberHeadings in /var/www/html/w/extensions/MagicNoNumberedHeadings/MagicNoNumberedHeadings.php on line 59
The problem is easily fixed by this patch:
```
diff --git a/wiki/extensions/MagicNoNumberedHeadings/MagicNoNumberedHeadings.php b/wiki/extensions/MagicNoNumberedHeadings/MagicNoNumberedHeadings.php
index 54cf267..53ae97b 100644
--- a/wiki/extensions/MagicNoNumberedHeadings/MagicNoNumberedHeadings.php
+++ b/wiki/extensions/MagicNoNumberedHeadings/MagicNoNumberedHeadings.php
@@ -56,7 +56,7 @@ $wgHooks['ParserBeforeInternalParse'][] = 'MagicNoNumberedHeadingsParserBeforeIn
function MagicNoNumberedHeadingsParserBeforeInternalParse( &$parser, &$text, $stripState )
{
if (MagicWord::get( 'MAG_NONUMBEREDHEADINGS' )->matchAndRemove( $text ) ) {
- $parser->mOptions->mNumberHeadings = (FALSE);
+ $parser->mOptions->setNumberHeadings(false);
}
return true;
}
```