From b2b33db3552e1c99bf9842a36fa30c064fc5a5d6 Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 7 Sep 2006 16:35:59 +0000
Subject: * numeric.c (fix_plus): addition in Fixnum will never overflow  
 long.  a patch from Ondrej Bilka <neleai at seznam.cz>.   [ruby-core:08794]

* numeric.c (fix_minus): ditto.

* bignum.c (rb_big_pow): eagerly truncate resulting bignum.
  [ruby-core:08794]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10880 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 bignum.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'bignum.c')

diff --git a/bignum.c b/bignum.c
index 6a7a83c085..df702e26ca 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1617,8 +1617,10 @@ rb_big_pow(x, y)
 		while (yy % 2 == 0) {
 		    yy /= 2;
 		    x = rb_big_mul(x, x);
+		    if (!BDIGITS(x)[RBIGNUM(x)->len-1]) RBIGNUM(x)->len--;
 		}
 		z = rb_big_mul(z, x);
+		if (!BDIGITS(z)[RBIGNUM(z)->len-1]) RBIGNUM(z)->len--;
 	    }
 	    return bignorm(z);
 	}
-- 
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