Customize: Prevent potential cache corruption when finding a secondary changeset post by UUID.

Props dlh.
Fixes #41738.

Built from https://develop.svn.wordpress.org/trunk@41321


git-svn-id: http://core.svn.wordpress.org/trunk@41152 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-manager.php

@@ -816,7 +816,7 @@ final class WP_Customize_Manager {
 		if ( ! empty( $changeset_post_query->posts ) ) {
 			// Note: 'fields'=>'ids' is not being used in order to cache the post object as it will be needed.
 			$changeset_post_id = $changeset_post_query->posts[0]->ID;
-			wp_cache_set( $this->_changeset_uuid, $changeset_post_id, $cache_group );
+			wp_cache_set( $uuid, $changeset_post_id, $cache_group );
 			return $changeset_post_id;
 		}
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41320';
+$wp_version = '4.9-alpha-41321';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.