diff --git a/wp-includes/class-wp-query.php b/wp-includes/class-wp-query.php
index 6ae1674b71..ef9e0668a1 100644
--- a/wp-includes/class-wp-query.php
+++ b/wp-includes/class-wp-query.php
@@ -536,10 +536,10 @@ class WP_Query {
 	 * @since 2.1.0
 	 * @since 4.5.0 Removed the `comments_popup` public query variable.
 	 *
-	 * @param array $array Defined query variables.
+	 * @param array $query_vars Defined query variables.
 	 * @return array Complete query variables with undefined ones filled in empty.
 	 */
-	public function fill_query_vars( $array ) {
+	public function fill_query_vars( $query_vars ) {
 		$keys = array(
 			'error',
 			'm',
@@ -580,8 +580,8 @@ class WP_Query {
 		);
 
 		foreach ( $keys as $key ) {
-			if ( ! isset( $array[ $key ] ) ) {
-				$array[ $key ] = '';
+			if ( ! isset( $query_vars[ $key ] ) ) {
+				$query_vars[ $key ] = '';
 			}
 		}
 
@@ -604,11 +604,12 @@ class WP_Query {
 		);
 
 		foreach ( $array_keys as $key ) {
-			if ( ! isset( $array[ $key ] ) ) {
-				$array[ $key ] = array();
+			if ( ! isset( $query_vars[ $key ] ) ) {
+				$query_vars[ $key ] = array();
 			}
 		}
-		return $array;
+
+		return $query_vars;
 	}
 
 	/**
@@ -1747,18 +1748,18 @@ class WP_Query {
 	 * Retrieves the value of a query variable.
 	 *
 	 * @since 1.5.0
-	 * @since 3.9.0 The `$default` argument was introduced.
+	 * @since 3.9.0 The `$default_value` argument was introduced.
 	 *
-	 * @param string $query_var Query variable key.
-	 * @param mixed  $default   Optional. Value to return if the query variable is not set. Default empty string.
+	 * @param string $query_var     Query variable key.
+	 * @param mixed  $default_value Optional. Value to return if the query variable is not set. Default empty string.
 	 * @return mixed Contents of the query variable.
 	 */
-	public function get( $query_var, $default = '' ) {
+	public function get( $query_var, $default_value = '' ) {
 		if ( isset( $this->query_vars[ $query_var ] ) ) {
 			return $this->query_vars[ $query_var ];
 		}
 
-		return $default;
+		return $default_value;
 	}
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8649cabcb9..f35a9315d5 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-beta2-53276';
+$wp_version = '6.0-beta2-53277';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.