id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
19500	User deletion doesn't clear user_meta cache	duck_	ryan	"wp_delete_user() and wpmu_delete_user() leave user_meta in the cache. Example:

{{{
get_user_meta( $user_id );
wp_delete_user( $user_id );
var_dump( is_user_member_of_blog( $user_id ) ); // bool(true) instead of bool(false)
}}}

Possible solutions:

 1. Extend clean_user_cache() to delete from user_meta too
 2. delete_user_meta() in wp_delete_user() instead of direct query

Ryan wasn't keen on 1 as ""Most of the time clean_user_cache() doesn't need to touch meta cache"".

2. will introduce the delete(d)_user_meta actions when using wp_delete_user().

wp_cache_delete( $id, 'user_meta' ) in wp_delete_user() was also floated as a stop-gap measure, but since this will be fixed in a future release we can ignore the suggestion.

See: [comment:ticket:19160:6], #11761"	defect (bug)	closed	normal	3.4	Cache	3.2.1	normal	fixed	has-patch