From a8581ce673e14ba5ff48d0a3cb71368daa82558b Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@ruby-lang.org>
Date: Wed, 4 Nov 2020 11:33:59 -0800
Subject: [PATCH] ensure T_OBJECT objects have internals initialized

---
 gc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gc.c b/gc.c
index 65876894bd..abc311a8e9 100644
--- a/gc.c
+++ b/gc.c
@@ -2304,7 +2304,11 @@ rb_newobj(void)
 VALUE
 rb_newobj_of(VALUE klass, VALUE flags)
 {
-    return newobj_of(klass, flags & ~FL_WB_PROTECTED, 0, 0, 0, flags & FL_WB_PROTECTED);
+    if ((flags & RUBY_T_MASK) == T_OBJECT) {
+        return newobj_of(klass, (flags | ROBJECT_EMBED) & ~FL_WB_PROTECTED , Qundef, Qundef, Qundef, flags & FL_WB_PROTECTED);
+    } else {
+        return newobj_of(klass, flags & ~FL_WB_PROTECTED, 0, 0, 0, flags & FL_WB_PROTECTED);
+    }
 }
 
 #define UNEXPECTED_NODE(func) \