wp-includes/rss.php:835$debugmsg$lvloptionalE_USER_NOTICE function debug ($debugmsg, $lvl=E_USER_NOTICE) { if ( MAGPIE_DEBUG ) { $this->error("MagpieRSS [debug] $debugmsg", $lvl); } }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rss.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.