range.c (range_last): disable optimization when each is redefined

Do not use the optimized version of Range#last when Range#each is
redefined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66749 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 1 deletions

diff --git a/range.c b/range.c
index 77b1d7b25d..4b8d14e2c9 100644
--- a/range.c
+++ b/range.c
@@ -1088,7 +1088,8 @@ range_last(int argc, VALUE *argv, VALUE range)
 
     b = RANGE_BEG(range);
     e = RANGE_END(range);
-    if (RB_INTEGER_TYPE_P(b) && RB_INTEGER_TYPE_P(e)) {
+    if (RB_INTEGER_TYPE_P(b) && RB_INTEGER_TYPE_P(e) &&
+        RB_LIKELY(rb_method_basic_definition_p(rb_cRange, idEach))) {
         return rb_int_range_last(argc, argv, range);
     }
     return rb_ary_last(argc, argv, rb_Array(range));