* bignum.c (get2comp): do nothing for empty Bignum. [ruby-dev:31225]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12790 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/bignum.c b/bignum.c
index d7ba14174c..51a5a43d85 100644
--- a/bignum.c
+++ b/bignum.c
@@ -70,6 +70,7 @@ get2comp(VALUE x)
     BDIGIT *ds = BDIGITS(x);
     BDIGIT_DBL num;
 
+    if (!i) return;
     while (i--) ds[i] = ~ds[i];
     i = 0; num = 1;
     do {