https://git.ruby-lang.org/ruby.git/commit/?id=764e4fa850

From 764e4fa850de749790e5ed11c8a4ab86a4499ac0 Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@h...>
Date: Sat, 29 Jan 2022 21:27:53 -0800
Subject: Never call kind_of with klass=0

---
 ext/objspace/objspace.c | 9 +--------
 object.c                | 2 ++
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/ext/objspace/objspace.c b/ext/objspace/objspace.c
index d33dfeb80a..bd80e540cf 100644
--- a/ext/objspace/objspace.c
+++ b/ext/objspace/objspace.c
@@ -61,14 +61,7 @@ total_i(VALUE v, void *ptr) https://github.com/ruby/ruby/blob/trunk/ext/objspace/objspace.c#L61
 {
     struct total_data *data = (struct total_data *)ptr;
 
-    switch (BUILTIN_TYPE(v)) {
-      case T_NONE:
-      case T_IMEMO:
-      case T_ICLASS:
-      case T_NODE:
-      case T_ZOMBIE:
-          return;
-      default:
+    if (!rb_objspace_internal_object_p(v)) {
           if (data->klass == 0 || rb_obj_is_kind_of(v, data->klass)) {
               data->total += rb_obj_memsize_of(v);
           }
diff --git a/object.c b/object.c
index f056767f13..ff94469292 100644
--- a/object.c
+++ b/object.c
@@ -791,6 +791,8 @@ rb_obj_is_kind_of(VALUE obj, VALUE c) https://github.com/ruby/ruby/blob/trunk/object.c#L791
 {
     VALUE cl = CLASS_OF(obj);
 
+    RUBY_ASSERT(cl);
+
     // Note: YJIT needs this function to never allocate and never raise when
     // `c` is a class or a module.
     c = class_or_module_required(c);
-- 
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