https://git.ruby-lang.org/ruby.git/commit/?id=e3ef21c307

From e3ef21c3077c4b45edb44c06b0d580a4c913c557 Mon Sep 17 00:00:00 2001
From: Matt Valentine-House <matt@e...>
Date: Tue, 26 Jan 2021 16:56:16 +0000
Subject: Use RCLASS_EXT macro instead of directly accessing ptr

---
 gc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/gc.c b/gc.c
index b1e115f..2d76b54 100644
--- a/gc.c
+++ b/gc.c
@@ -2847,9 +2847,9 @@ obj_free(rb_objspace_t *objspace, VALUE obj) https://github.com/ruby/ruby/blob/trunk/gc.c#L2847
 	}
 	rb_class_remove_from_module_subclasses(obj);
 	rb_class_remove_from_super_subclasses(obj);
-	if (RANY(obj)->as.klass.ptr)
-	    xfree(RANY(obj)->as.klass.ptr);
-	RANY(obj)->as.klass.ptr = NULL;
+	if (RCLASS_EXT(obj))
+	    xfree(RCLASS_EXT(obj));
+	RCLASS_EXT(obj) = NULL;
 
         (void)RB_DEBUG_COUNTER_INC_IF(obj_module_ptr, BUILTIN_TYPE(obj) == T_MODULE);
         (void)RB_DEBUG_COUNTER_INC_IF(obj_class_ptr, BUILTIN_TYPE(obj) == T_CLASS);
@@ -3015,8 +3015,8 @@ obj_free(rb_objspace_t *objspace, VALUE obj) https://github.com/ruby/ruby/blob/trunk/gc.c#L3015
         cc_table_free(objspace, obj, FALSE);
 	rb_class_remove_from_module_subclasses(obj);
 	rb_class_remove_from_super_subclasses(obj);
-	xfree(RANY(obj)->as.klass.ptr);
-	RANY(obj)->as.klass.ptr = NULL;
+	xfree(RCLASS_EXT(obj));
+	RCLASS_EXT(obj) = NULL;
 
         RB_DEBUG_COUNTER_INC(obj_iclass_ptr);
 	break;
-- 
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