id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
21439	Correct wp_update_user() @return value	SergeyBiryukov	ryan	"`wp_update_user()` calls `wp_insert_user()`, which returns a `WP_Error` object on failure:
http://core.trac.wordpress.org/browser/tags/3.4.1/wp-includes/user.php#L1249
"	defect (bug)	closed	normal	3.5	Inline Docs		normal	fixed	has-patch