From 74712c73ac9471fd388d76b0f12229ec428d5146 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Wed, 5 Apr 2017 11:53:20 +0900
Subject: Need to insert write barriers in struct updates; fix #3547

---
 mrbgems/mruby-struct/src/struct.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'mrbgems/mruby-struct/src')

diff --git a/mrbgems/mruby-struct/src/struct.c b/mrbgems/mruby-struct/src/struct.c
index 93bd1e2b2..de9785df7 100644
--- a/mrbgems/mruby-struct/src/struct.c
+++ b/mrbgems/mruby-struct/src/struct.c
@@ -449,6 +449,7 @@ mrb_struct_aset_sym(mrb_state *mrb, mrb_value s, mrb_sym id, mrb_value val)
   for (i=0; i<len; i++) {
     if (mrb_symbol(ptr_members[i]) == id) {
       ptr[i] = val;
+      mrb_write_barrier(mrb, (struct RBasic*)mrb_ptr(s));
       return val;
     }
   }
@@ -511,6 +512,7 @@ mrb_struct_aset(mrb_state *mrb, mrb_value s)
                "offset %S too large for struct(size:%S)",
                mrb_fixnum_value(i), mrb_fixnum_value(RSTRUCT_LEN(s)));
   }
+  mrb_write_barrier(mrb, (struct RBasic*)mrb_ptr(s));
   return RSTRUCT_PTR(s)[i] = val;
 }
 
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