range.c: reject ArithmeticSequence in rb_range_values

Reject ArithmeticSequence in rb_range_values so that methods like
Array#[] raises TypeError for ArithmeticSequence as an index.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/range.c b/range.c
index dab8314400..ac9affd872 100644
--- a/range.c
+++ b/range.c
@@ -1141,6 +1141,9 @@ rb_range_values(VALUE range, VALUE *begp, VALUE *endp, int *exclp)
 	e = RANGE_END(range);
 	excl = EXCL(range);
     }
+    else if (RTEST(rb_obj_is_kind_of(range, rb_cArithSeq))) {
+        return (int)Qfalse;
+    }
     else {
 	VALUE x;
 	b = rb_check_funcall(range, id_beg, 0, 0);