From b47daf811ac057b919a12f71ac1847d16a6d464b Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 15 Jul 2007 12:07:46 +0000
Subject: * bignum.c (get2comp): do nothing for empty Bignum.  [ruby-dev:31225]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@12796 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 bignum.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'bignum.c')

diff --git a/bignum.c b/bignum.c
index 8815a43808..fb469e1a84 100644
--- a/bignum.c
+++ b/bignum.c
@@ -104,7 +104,7 @@ bigtrunc(x)
     long len = RBIGNUM(x)->len;
     BDIGIT *ds = BDIGITS(x);
 
-    while (len-- && !ds[len]);
+    while (--len && !ds[len]);
     RBIGNUM(x)->len = ++len;
     return x;
 }
@@ -1100,6 +1100,7 @@ rb_big_neg(x)
     if (!RBIGNUM(x)->sign) get2comp(z);
     ds = BDIGITS(z);
     i = RBIGNUM(x)->len;
+    if (!i) return INT2FIX(~(SIGNED_VALUE)0);
     while (i--) ds[i] = ~ds[i];
     RBIGNUM(z)->sign = !RBIGNUM(z)->sign;
     if (RBIGNUM(x)->sign) get2comp(z);
-- 
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