akr	2013-06-15 17:15:40 +0900 (Sat, 15 Jun 2013)

  New Revision: 41310

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=41310

  Log:
    * bignum.c (bigmul1_normal): Shrink the result Bignum length.

  Modified files:
    trunk/ChangeLog
    trunk/bignum.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 41309)
+++ ChangeLog	(revision 41310)
@@ -1,3 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Sat Jun 15 17:14:32 2013  Tanaka Akira  <akr@f...>
+
+	* bignum.c (bigmul1_normal): Shrink the result Bignum length.
+
 Sat Jun 15 10:19:42 2013  Zachary Scott  <zachary@z...>
 
 	* ext/bigdecimal/bigdecimal.c: Update overview formatting of headers
Index: bignum.c
===================================================================
--- bignum.c	(revision 41309)
+++ bignum.c	(revision 41310)
@@ -3139,7 +3139,7 @@ bigmul1_single(VALUE x, VALUE y) https://github.com/ruby/ruby/blob/trunk/bignum.c#L3139
 static VALUE
 bigmul1_normal(VALUE x, VALUE y)
 {
-    long xl = RBIGNUM_LEN(x), yl = RBIGNUM_LEN(y), i, j = xl + yl + 1;
+    long xl = RBIGNUM_LEN(x), yl = RBIGNUM_LEN(y), i, j = xl + yl;
     BDIGIT_DBL n = 0;
     VALUE z = bignew(j, RBIGNUM_SIGN(x)==RBIGNUM_SIGN(y));
     BDIGIT *xds, *yds, *zds;

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