diff --git a/wp-includes/blocks/rss.php b/wp-includes/blocks/rss.php
index 0300585de2..0315cfc013 100644
--- a/wp-includes/blocks/rss.php
+++ b/wp-includes/blocks/rss.php
@@ -20,10 +20,6 @@ function render_block_core_rss( $attributes ) {
 	}
 
 	if ( ! $rss->get_item_quantity() ) {
-		// PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
-		$rss->__destruct();
-		unset( $rss );
-
 		return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</div></div>';
 	}
 
@@ -96,13 +92,7 @@ function render_block_core_rss( $attributes ) {
 		$class .= ' ' . $attributes['className'];
 	}
 
-	$list_items_markup = "<ul class='{$class}'>{$list_items}</ul>";
-
-	// PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
-	$rss->__destruct();
-	unset( $rss );
-
-	return $list_items_markup;
+	return "<ul class='{$class}'>{$list_items}</ul>";
 }
 
 /**
diff --git a/wp-includes/blocks/search.php b/wp-includes/blocks/search.php
index 6cd909fc6f..67bc90ff35 100644
--- a/wp-includes/blocks/search.php
+++ b/wp-includes/blocks/search.php
@@ -25,6 +25,12 @@ function render_block_core_search( $attributes ) {
 			$input_id,
 			$attributes['label']
 		);
+	} else {
+		$label_markup = sprintf(
+			'<label for="%s" class="wp-block-search__label screen-reader-text">%s</label>',
+			$input_id,
+			__( 'Search' )
+		);
 	}
 
 	$input_markup = sprintf(
@@ -45,7 +51,6 @@ function render_block_core_search( $attributes ) {
 	if ( isset( $attributes['className'] ) ) {
 		$class .= ' ' . $attributes['className'];
 	}
-
 	if ( isset( $attributes['align'] ) ) {
 		$class .= ' align' . $attributes['align'];
 	}
diff --git a/wp-includes/class-wp-query.php b/wp-includes/class-wp-query.php
index 658e66bb9c..7a96e0160b 100644
--- a/wp-includes/class-wp-query.php
+++ b/wp-includes/class-wp-query.php
@@ -694,10 +694,11 @@ class WP_Query {
 	 *     @type string       $pagename                Page slug.
 	 *     @type string       $perm                    Show posts if user has the appropriate capability.
 	 *     @type string       $ping_status             Ping status.
-	 *     @type array        $post__in                An array of post IDs to retrieve, sticky posts will be included
-	 *     @type string       $post_mime_type          The mime type of the post. Used for 'attachment' post_type.
+	 *     @type array        $post__in                An array of post IDs to retrieve, sticky posts will be included.
 	 *     @type array        $post__not_in            An array of post IDs not to retrieve. Note: a string of comma-
 	 *                                                 separated IDs will NOT work.
+	 *     @type string       $post_mime_type          The mime type of the post. Used for 'attachment' post_type.
+	 *     @type array        $post_name__in           An array of post slugs that results must match.
 	 *     @type int          $post_parent             Page ID to retrieve child pages for. Use 0 to only retrieve
 	 *                                                 top-level pages.
 	 *     @type array        $post_parent__in         An array containing parent page IDs to query child pages from.
@@ -708,7 +709,6 @@ class WP_Query {
 	 *     @type int          $posts_per_page          The number of posts to query for. Use -1 to request all posts.
 	 *     @type int          $posts_per_archive_page  The number of posts to query for by archive page. Overrides
 	 *                                                 'posts_per_page' when is_archive(), or is_search() are true.
-	 *     @type array        $post_name__in           An array of post slugs that results must match.
 	 *     @type string       $s                       Search keyword(s). Prepending a term with a hyphen will
 	 *                                                 exclude posts matching that term. Eg, 'pillow -sofa' will
 	 *                                                 return posts containing 'pillow' but not 'sofa'. The
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b2073b5134..aaf75ceaf8 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-47051';
+$wp_version = '5.4-alpha-47052';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.