From 70e3e08881d3f7f59828776de6af8b1898ebfe77 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Wed, 1 Nov 2023 11:05:46 -0400
Subject: [PATCH] Optimize for too complex objects

---
 variable.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/variable.c b/variable.c
index be04b34527..082d7537a5 100644
--- a/variable.c
+++ b/variable.c
@@ -2202,6 +2202,7 @@ rb_obj_remove_instance_variable(VALUE obj, VALUE name)
             if (!rb_shape_obj_too_complex(obj)) {
                 rb_evict_ivars_to_hash(obj, shape);
             }
+
             if (!st_delete(RCLASS_IV_HASH(obj), (st_data_t *)&id, (st_data_t *)&val)) {
                 val = Qundef;
             }
@@ -2212,8 +2213,9 @@ rb_obj_remove_instance_variable(VALUE obj, VALUE name)
             if (!rb_shape_obj_too_complex(obj)) {
                 rb_evict_ivars_to_hash(obj, shape);
             }
-            if (rb_st_lookup(ROBJECT_IV_HASH(obj), (st_data_t)id, (st_data_t *)&val)) {
-                rb_st_delete(ROBJECT_IV_HASH(obj), (st_data_t *)&id, 0);
+
+            if (!st_delete(ROBJECT_IV_HASH(obj), (st_data_t *)&id, (st_data_t *)&val)) {
+                val = Qundef;
             }
         }
         break;