From 4720648137f2698cceb635c251475dec645cd598 Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Wed, 24 Apr 2019 21:05:44 +0900
Subject: Fix modiying class variable to frozen class/module

---
 src/variable.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/variable.c')

diff --git a/src/variable.c b/src/variable.c
index 983fe52f7..c4c9d369f 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -671,6 +671,7 @@ mrb_mod_cv_set(mrb_state *mrb, struct RClass *c, mrb_sym sym, mrb_value v)
     iv_tbl *t = c->iv;
 
     if (iv_get(mrb, t, sym, NULL)) {
+      mrb_check_frozen(mrb, c);
       iv_put(mrb, t, sym, v);
       mrb_write_barrier(mrb, (struct RBasic*)c);
       return;
@@ -698,6 +699,7 @@ mrb_mod_cv_set(mrb_state *mrb, struct RClass *c, mrb_sym sym, mrb_value v)
     c = cls;
   }
 
+  mrb_check_frozen(mrb, c);
   if (!c->iv) {
     c->iv = iv_new(mrb);
   }
-- 
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