Undefined variable: object in ctools_cache_clear()

includes/cache.inc :
function ctools_cache_set($mechanism, $key, $object) {
return ctools_cache_operation($mechanism, $key, 'set', $object);
}
function ctools_cache_clear($mechanism, $key) {
return ctools_cache_operation($mechanism, $key, 'clear', $object);
}

shouldnt we call the operation function with the $object param here ?

thanks