* bignum.c (bigdivrem): adjust length for division and remainder.

  a patch from TOYOFUKU Chikanobu <nobu_toyofuku at nifty.com> in 
  [ruby-dev:36231].

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@19293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 64dc2fbdd..fc48ad358 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Thu Sep 11 15:23:26 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* bignum.c (bigdivrem): adjust length for division and remainder.
+	  a patch from TOYOFUKU Chikanobu <nobu_toyofuku at nifty.com> in 
+	  [ruby-dev:36231].
+
 Thu Sep 11 02:59:47 2008  Tanaka Akira  <akr@fsij.org>
 
 	* io.c (io_binwrite): extracted from io_fwrite.
diff --git a/bignum.c b/bignum.c
index 3e4ac0dea..a3f8d25a6 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1749,6 +1749,7 @@ bigdivrem(VALUE x, VALUE y, VALUE *divp, VALUE *modp)
 	zds = BDIGITS(*divp);
 	j = (nx==ny ? nx+2 : nx+1) - ny;
 	for (i = 0;i < j;i++) zds[i] = zds[i+ny];
+	if (!zds[i-1]) i--;
 	RBIGNUM_SET_LEN(*divp, i);
     }
     if (modp) {			/* normalize remainder */
@@ -1764,6 +1765,7 @@ bigdivrem(VALUE x, VALUE y, VALUE *divp, VALUE *modp)
 		t2 = BIGUP(q);
 	    }
 	}
+	if (!zds[ny-1]) ny--;
 	RBIGNUM_SET_LEN(*modp, ny);
 	RBIGNUM_SET_SIGN(*modp, RBIGNUM_SIGN(x));
     }