diff --git a/wp-includes/class-wp-block-parser.php b/wp-includes/class-wp-block-parser.php
index e987307a0c..cbecb0d2b9 100644
--- a/wp-includes/class-wp-block-parser.php
+++ b/wp-includes/class-wp-block-parser.php
@@ -62,7 +62,7 @@ class WP_Block_Parser_Block {
 	 *   'innerContent' => array( 'Before', null, 'Inner', null, 'After' ),
 	 * )
 	 *
-	 * @since 5.0.0
+	 * @since 4.2.0
 	 * @var array
 	 */
 	public $innerContent;
@@ -164,9 +164,10 @@ class WP_Block_Parser_Frame {
 /**
  * Class WP_Block_Parser
  *
- * Parses a document and constructs a list of parsed blocks.
+ * Parses a document and constructs a list of parsed block objects
  *
  * @since 5.0.0
+ * @since 4.0.0 returns arrays not objects, all attributes are arrays
  */
 class WP_Block_Parser {
 	/**
@@ -191,7 +192,7 @@ class WP_Block_Parser {
 	 * List of parsed blocks
 	 *
 	 * @since 5.0.0
-	 * @var WP_Block_Parser_Block[]
+	 * @var array[]
 	 */
 	public $output;
 
@@ -206,7 +207,7 @@ class WP_Block_Parser {
 	/**
 	 * Empty associative array, here due to PHP quirks
 	 *
-	 * @since 5.0.0
+	 * @since 4.4.0
 	 * @var array empty associative array
 	 */
 	public $empty_attrs;
@@ -221,7 +222,7 @@ class WP_Block_Parser {
 	 * @since 5.0.0
 	 *
 	 * @param string $document Input document being parsed.
-	 * @return WP_Block_Parser_Block[]
+	 * @return array[]
 	 */
 	function parse( $document ) {
 		$this->document    = $document;
@@ -394,6 +395,7 @@ class WP_Block_Parser {
 	 *
 	 * @internal
 	 * @since 5.0.0
+	 * @since 4.6.1 fixed a bug in attribute parsing which caused catastrophic backtracking on invalid block comments
 	 * @return array
 	 */
 	function next_token() {
@@ -466,7 +468,7 @@ class WP_Block_Parser {
 	 * Returns a new block object for freeform HTML
 	 *
 	 * @internal
-	 * @since 5.0.0
+	 * @since 3.9.0
 	 *
 	 * @param string $innerHTML HTML content of block.
 	 * @return WP_Block_Parser_Block freeform block object.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e69a8381f8..dbf3015c75 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-54193';
+$wp_version = '6.1-alpha-54194';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.