From 121f967bcdcbaf11dc23657c15c655324f8059d9 Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@hawthorn.email>
Date: Mon, 9 Jun 2025 10:09:10 -0700
Subject: [PATCH] More write barriers to local_iseq and parent_iseq

Found by wbcheck
---
 iseq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/iseq.c b/iseq.c
index dcde27ba1b..1201b877ab 100644
--- a/iseq.c
+++ b/iseq.c
@@ -602,11 +602,11 @@ set_relation(rb_iseq_t *iseq, const rb_iseq_t *piseq)
         body->local_iseq = iseq;
     }
     else if (piseq) {
-        body->local_iseq = ISEQ_BODY(piseq)->local_iseq;
+        RB_OBJ_WRITE(iseq, &body->local_iseq, ISEQ_BODY(piseq)->local_iseq);
     }
 
     if (piseq) {
-        body->parent_iseq = piseq;
+        RB_OBJ_WRITE(iseq, &body->parent_iseq, piseq);
     }
 
     if (type == ISEQ_TYPE_MAIN) {