* bignum.c (rb_big2ulong): need to calc in unsigned long, because

  the range of VALUE is larger than it on LLP64 platform, such as Win64.
  this change fixes the failures of test/-ext-/num2int.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33773 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/bignum.c b/bignum.c
index a1c4ac78a0..2d61bb37c0 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1210,11 +1210,11 @@ rb_big2ulong(VALUE x)
     VALUE num = big2ulong(x, "unsigned long", TRUE);
 
     if (!RBIGNUM_SIGN(x)) {
-	VALUE v = (VALUE)(-(SIGNED_VALUE)num);
+	unsigned long v = (unsigned long)(-(long)num);
 
 	if (v <= LONG_MAX)
 	    rb_raise(rb_eRangeError, "bignum out of range of unsigned long");
-	return v;
+	return (VALUE)v;
     }
     return num;
 }