Merge pull request #4687 from shuujii/fix-argument-specs-to-BasicObject

Fix argument specs to `BasicObject`

src/class.c

@@ -2200,9 +2200,9 @@ mrb_init_class(mrb_state *mrb)
   mrb_define_method(mrb, bob, "==",                      mrb_obj_equal_m,          MRB_ARGS_REQ(1)); /* 15.3.1.3.1  */
   mrb_define_method(mrb, bob, "!=",                      mrb_obj_not_equal_m,      MRB_ARGS_REQ(1));
   mrb_define_method(mrb, bob, "__id__",                  mrb_obj_id_m,             MRB_ARGS_NONE()); /* 15.3.1.3.4  */
-  mrb_define_method(mrb, bob, "__send__",                mrb_f_send,               MRB_ARGS_ANY());  /* 15.3.1.3.5  */
+  mrb_define_method(mrb, bob, "__send__",                mrb_f_send,               MRB_ARGS_REQ(1)|MRB_ARGS_REST()|MRB_ARGS_BLOCK());  /* 15.3.1.3.5  */
   mrb_define_method(mrb, bob, "equal?",                  mrb_obj_equal_m,          MRB_ARGS_REQ(1)); /* 15.3.1.3.11 */
-  mrb_define_method(mrb, bob, "instance_eval",           mrb_obj_instance_eval,    MRB_ARGS_ANY());  /* 15.3.1.3.18 */
+  mrb_define_method(mrb, bob, "instance_eval",           mrb_obj_instance_eval,    MRB_ARGS_OPT(1)|MRB_ARGS_BLOCK());  /* 15.3.1.3.18 */
 
   mrb_define_class_method(mrb, cls, "new",               mrb_class_new_class,      MRB_ARGS_OPT(1));
   mrb_define_method(mrb, cls, "allocate",                mrb_instance_alloc,       MRB_ARGS_NONE());