From f8454e53bac2b3c7da9956b9dd024ce83026f0fc Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Wed, 14 Aug 2013 16:51:50 +0900
Subject: check d->type before accessing d->type->dfree; #1474 #858

---
 src/gc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gc.c b/src/gc.c
index ec51fd527..16d187e30 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -646,7 +646,7 @@ obj_free(mrb_state *mrb, struct RBasic *obj)
   case MRB_TT_DATA:
     {
       struct RData *d = (struct RData*)obj;
-      if (d->type->dfree) {
+      if (d->type && d->type->dfree) {
         d->type->dfree(mrb, d->data);
       }
       mrb_gc_free_iv(mrb, (struct RObject*)obj);
-- 
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