https://git.ruby-lang.org/ruby.git/commit/?id=18e7f9000d

From 18e7f9000dc3695b9db02ae153d41bd1efa01d6e Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@r...>
Date: Wed, 29 Jan 2020 17:24:39 -0800
Subject: Use `rb_gc_mark` when marking globals

I think global references should either be 0 or valid heap pointers.
`rb_gc_mark_maybe` checks to see if the pointer is a valid heap pointer,
but I believe we already know they are valid addresses

diff --git a/variable.c b/variable.c
index 1db0614..ed84b85 100644
--- a/variable.c
+++ b/variable.c
@@ -397,7 +397,7 @@ void https://github.com/ruby/ruby/blob/trunk/variable.c#L397
 rb_gvar_val_marker(VALUE *var)
 {
     VALUE data = (VALUE)var;
-    if (data) rb_gc_mark_maybe(data);
+    if (data) rb_gc_mark(data);
 }
 
 VALUE
-- 
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