Handle insert_virtual_node exceptions

Author: sirreal

src/wp-includes/html-api/class-wp-html-processor.php

@@ -1160,6 +1160,14 @@ public function step( $node_to_process = self::PROCESS_NEXT_NODE ): bool {
 			 * otherwise might involve messier calling and return conventions.
 			 */
 			return false;
+		} catch ( Exception $e ) {
+			if ( self::ERROR_EXCEEDED_MAX_BOOKMARKS === $this->last_error ) {
+				return false;
+			}
+			/*
+			 * Rethrow any other exceptions for higher-level handling.
+			 */
+			throw $e;
 		}
 	}
 
@@ -6296,6 +6304,8 @@ private function insert_foreign_element( WP_HTML_Token $token, bool $only_add_to
 	 *
 	 * @since 6.7.0
 	 *
+	 * @throws Exception When unable to allocate a bookmark for the next token in the input HTML document.
+	 *
 	 * @param string      $token_name    Name of token to create and insert into the stack of open elements.
 	 * @param string|null $bookmark_name Optional. Name to give bookmark for created virtual node.
 	 *                                   Defaults to auto-creating a bookmark name.