Wikimedia Bugzilla is closed!

In LocalSettings, without any extensions, put this:

$wgHooks[ 'ArticlePageDataAfter' ][] = 'onArticlePageDataAfter';

function onArticlePageDataAfter( $article, $row ) {

    // get_class($article) => 'WikiPage'

    $text = $article->getRawText();

    echo $text;
    die();
}

This fails with "Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 523800 bytes) in [...]"

Granted, that's only 128 MB of RAM which is below the minimum hardware requirements.

I think the reason might be that at this point the WikiPage object may not be fully initialized. In later hooks the method works fine.