* range.c (range_step): fixed integer overflow. [ruby-dev:31763]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@13422 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/range.c b/range.c
index 41c1cf088..f5a8d15f5 100644
--- a/range.c
+++ b/range.c
@@ -332,8 +332,11 @@ range_step(int argc, VALUE *argv, VALUE range)
 
 	if (!EXCL(range))
 	    end += 1;
-	for (i = FIX2LONG(b); i < end; i += unit) {
+	i = FIX2LONG(b);	
+	while (i < end) {
 	    rb_yield(LONG2NUM(i));
+	    if (i + unit < i) break;
+	    i += unit;
 	}
     }
     else {