check d->type before accessing d->type->dfree; #1474 #858

f8454e53 · Yukihiro "Matz" Matsumoto · b7d6b4d0 · f8454e53
Commit f8454e53 authored Aug 14, 2013 by Yukihiro "Matz" Matsumoto
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src/gc.c src/gc.c +1 -1

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--- 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);