* string.c (rb_str_upto): String#upto from empty string makes

  inifinite loop.  [ruby-core:09864]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@11513 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/string.c b/string.c
index 455ac4428..49eddf614 100644
--- a/string.c
+++ b/string.c
@@ -1568,7 +1568,7 @@ rb_str_upto(VALUE beg, VALUE end, int excl)
 	StringValue(current);
 	if (excl && rb_str_equal(current, end)) break;
 	StringValue(current);
-	if (RSTRING_LEN(current) > RSTRING_LEN(end))
+	if (RSTRING_LEN(current) > RSTRING_LEN(end) || RSTRING(current)->len == 0)
 	    break;
     }