From ba090a46af56355d8c4a458f8000cceae26d1c4f Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 14 Jun 2018 11:25:12 +0900
Subject: Need to add a write barrier for ranges; fix #4042

Ranges are almost immutable but `initialize` and `initialize_copy`
modify the receiver so that we need to add a write barrier.
---
 src/range.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src')

diff --git a/src/range.c b/src/range.c
index 0360b48ae..e45308d35 100644
--- a/src/range.c
+++ b/src/range.c
@@ -120,6 +120,7 @@ range_init(mrb_state *mrb, mrb_value range, mrb_value beg, mrb_value end, mrb_bo
   }
   r->edges->beg = beg;
   r->edges->end = end;
+  mrb_write_barrier(mrb, (struct RBasic*)r);
 }
 /*
  *  call-seq:
-- 
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