enum.c: respect method visibility

* enum.c (ary_inject_op): should respect method visibility, do not
  optimize uncallable method.  [ruby-core:81349] [Bug #13592]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58871 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 3 deletions

diff --git a/enum.c b/enum.c
index 4e14e82090..674c3ccfb0 100644
--- a/enum.c
+++ b/enum.c
@@ -678,8 +678,9 @@ ary_inject_op(VALUE ary, VALUE init, VALUE op)
 
     id = SYM2ID(op);
     if (id == idPLUS) {
-        if ((FIXNUM_P(v) || RB_TYPE_P(v, T_BIGNUM)) &&
-             rb_method_basic_definition_p(rb_cInteger, idPLUS)) {
+	if (RB_INTEGER_TYPE_P(v) &&
+	    rb_method_basic_definition_p(rb_cInteger, idPLUS) &&
+	    rb_obj_respond_to(v, idPLUS, FALSE)) {
             n = 0;
             for (; i < RARRAY_LEN(ary); i++) {
                 e = RARRAY_AREF(ary, i);
@@ -705,7 +706,7 @@ ary_inject_op(VALUE ary, VALUE init, VALUE op)
         }
     }
     for (; i < RARRAY_LEN(ary); i++) {
-        v = rb_funcall(v, id, 1, RARRAY_AREF(ary, i));
+        v = rb_funcallv_public(v, id, 1, &RARRAY_CONST_PTR(ary)[i]);
     }
     return v;
 }