From 1ed6fd899769e6cd66a1a3f66b7818d48ba4231b Mon Sep 17 00:00:00 2001
From: Yuichiro Kaneko <spiketeika@gmail.com>
Date: Sun, 1 Oct 2023 23:46:19 +0900
Subject: [PATCH] Check the result of get_nd_recv before node type check for
 safety

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>
---
 compile.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/compile.c b/compile.c
index 40aedde788..6ef27ed1a4 100644
--- a/compile.c
+++ b/compile.c
@@ -5420,9 +5420,9 @@ compile_cpath(LINK_ANCHOR *const ret, rb_iseq_t *iseq, const NODE *cpath)
 static inline int
 private_recv_p(const NODE *node)
 {
-    if (nd_type_p(get_nd_recv(node), NODE_SELF)) {
-        NODE *self = get_nd_recv(node);
-        return RNODE_SELF(self)->nd_state != 0;
+    NODE *recv = get_nd_recv(node);
+    if (recv && nd_type_p(recv, NODE_SELF)) {
+        return RNODE_SELF(recv)->nd_state != 0;
     }
     return 0;
 }