id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
20919	Live Preview post-installation fails with multiple theme directories	duck_	nacin	"If another theme directory is registered with register_theme_directory() then clicking Live Preview on the post-installation screen results in a ""Cheatin' uh?"" message.

Tested with a checkout of wpcom-themes in the wp-content directory with a one line plugin:

{{{
register_theme_directory( '/srv/http/wp.dev/public/wp-content/wpcom-themes' );
}}}

The problem is that get_theme_roots() returns the array stored in the theme_roots transient. This doesn't contain a value for the newly installed theme yet, so get_raw_theme_root() returns false. Therefore, wp_get_theme( 'newly-installed-theme' ) uses WP_CONTENT_DIR as the value for $theme_root. So, the returned WP_Theme has a theme_not_found error.

So, the theme exists check in WP_Customize_Manager::setup_theme() fails and a ""Cheatin' uh?"" message is displayed.

A possible solution is the trash the theme_roots site transient post install so that the next get_theme_roots() calls search_theme_directories().

This is spun out of ocean90's comment on #20914."	defect (bug)	closed	normal	3.4	Themes	3.4	normal	fixed	has-patch commit