From 33d6e92e0c6eaf1308ce7108e653c53bb5fb106c Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@ruby-lang.org>
Date: Wed, 3 Feb 2021 12:48:37 -0800
Subject: [PATCH] Revert "Don't pin `val` passed in to `rb_define_const`."

I think this is breaking something

This reverts commit 1be84e53d76cff30ae371f0b397336dee934499d.
---
 variable.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/variable.c b/variable.c
index ff4f7964a7..92d7d11eab 100644
--- a/variable.c
+++ b/variable.c
@@ -3154,6 +3154,7 @@ rb_define_const(VALUE klass, const char *name, VALUE val)
     if (!rb_is_const_id(id)) {
 	rb_warn("rb_define_const: invalid name `%s' for constant", name);
     }
+    rb_gc_register_mark_object(val);
     rb_const_set(klass, id, val);
 }