From 2230ac4a28a727bbc621fb085d2d5ed0b6771ca5 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Wed, 18 Sep 2024 16:43:05 -0400
Subject: [PATCH] Fix potentially missing write barrier in iseq_build_kw

We're writing objects to the iseq but not firing the write barrier.
---
 compile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compile.c b/compile.c
index 6a471c2d2c..b726a03d59 100644
--- a/compile.c
+++ b/compile.c
@@ -11954,7 +11954,7 @@ iseq_build_kw(rb_iseq_t *iseq, VALUE params, VALUE keywords)
             rb_raise(rb_eTypeError, "keyword default has unsupported len %+"PRIsVALUE, key);
         }
         ids[i] = SYM2ID(sym);
-        dvs[j] = default_val;
+        RB_OBJ_WRITE(iseq, &dvs[j], default_val);
     }
 
     keyword->table = ids;