From 45b36954df8bc46d16fadf17e0124f9719207a50 Mon Sep 17 00:00:00 2001
From: mattn <mattn.jp@gmail.com>
Date: Thu, 26 Apr 2012 11:29:30 +0900
Subject: fix #56

---
 src/variable.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'src/variable.c')

diff --git a/src/variable.c b/src/variable.c
index a9f04538b..7116155a7 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -347,9 +347,11 @@ mrb_f_global_variables(mrb_state *mrb, mrb_value self)
   struct kh_iv *h = mrb->globals;
   mrb_value ary = mrb_ary_new(mrb);
 
-  for (i=0;i< kh_end(h);i++) {
-    if (kh_exist(h, i)) {
-      mrb_ary_push(mrb, ary, mrb_symbol_value(kh_key(h,i)));
+  if (h) {
+    for (i=0;i < kh_end(h);i++) {
+      if (kh_exist(h, i)) {
+        mrb_ary_push(mrb, ary, mrb_symbol_value(kh_key(h,i)));
+      }
     }
   }
   buf[0] = '$';
-- 
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