From a2aa7e7f520b42a2de393039bd8d468dbd299026 Mon Sep 17 00:00:00 2001
From: Akira Kuroda <akuroda@gmail.com>
Date: Sun, 29 Jul 2012 00:21:40 +0900
Subject: fix segmentation fault in Array#first

---
 src/array.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/array.c')

diff --git a/src/array.c b/src/array.c
index 0f52c38ef..ccd22674e 100644
--- a/src/array.c
+++ b/src/array.c
@@ -764,6 +764,9 @@ mrb_ary_first(mrb_state *mrb, mrb_value self)
   if (mrb_get_args(mrb, "|i", &size) == 0) {
     return (a->len > 0)? a->ptr[0]: mrb_nil_value();
   }
+  if (size < 0) {
+    mrb_raise(mrb, E_ARGUMENT_ERROR, "negative array size");
+  }
 
   if (size > a->len) size = a->len;
   if (a->flags & MRB_ARY_SHARED) {
-- 
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