From c171984ee39bc00f4e4d46799217f38fd8d6d3a0 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Sat, 11 Apr 2020 19:00:08 -0700
Subject: [PATCH] Enable fastpath on invokesuper

---
 vm_insnhelper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 2fca2bdd9d..f24c756a86 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -3222,7 +3222,8 @@ vm_search_super_method(const rb_control_frame_t *reg_cfp, struct rb_call_data *c
             const struct rb_callcache *cc = vm_cc_new(klass, cme, vm_call_super_method);
             RB_OBJ_WRITE(reg_cfp->iseq, &cd->cc, cc);
         }
-        else {
+        else if (cached_cme->def->type == VM_METHOD_TYPE_REFINED) {
+            // vm_call_refined checks cc->call
             vm_cc_call_set(cd->cc, vm_call_super_method);
         }
     }