From acd44902b917230066b4fc7ea6c7e12556274512 Mon Sep 17 00:00:00 2001
From: Haldun Bayhantopcu <haldun@github.com>
Date: Mon, 25 Sep 2023 15:20:56 +0200
Subject: [PATCH] [ruby/yarp] Fix crashes in parsing block arguments

https://github.com/ruby/yarp/commit/e1f2fde775
---
 yarp/yarp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/yarp/yarp.c b/yarp/yarp.c
index fe291d0c3b533a..3272d15d85381a 100644
--- a/yarp/yarp.c
+++ b/yarp/yarp.c
@@ -9810,6 +9810,9 @@ parse_arguments_list(yp_parser_t *parser, yp_arguments_t *arguments, bool accept
                 arguments->block = (yp_node_t *) block;
             } else {
                 yp_diagnostic_list_append(&parser->error_list, block->base.location.start, block->base.location.end, YP_ERR_ARGUMENT_BLOCK_MULTI);
+                if (arguments->arguments == NULL) {
+                    arguments->arguments = yp_arguments_node_create(parser);
+                }
                 yp_arguments_node_arguments_append(arguments->arguments, arguments->block);
                 arguments->block = (yp_node_t *) block;
             }