From 1e33a451bbbec1ffa15fc3032a0bdd74bd9b41ff Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@gmail.com>
Date: Fri, 16 May 2025 15:37:00 +0200
Subject: gc: Execute run_final with the lock held

The finalizer table can't be read nor modified without the VM lock.
---
 gc/default/default.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gc/default/default.c b/gc/default/default.c
index 131086c338..7a488562a7 100644
--- a/gc/default/default.c
+++ b/gc/default/default.c
@@ -2857,9 +2857,9 @@ finalize_list(rb_objspace_t *objspace, VALUE zombie)
         next_zombie = RZOMBIE(zombie)->next;
         page = GET_HEAP_PAGE(zombie);
 
-        run_final(objspace, zombie);
-
         int lev = rb_gc_vm_lock();
+
+        run_final(objspace, zombie);
         {
             GC_ASSERT(BUILTIN_TYPE(zombie) == T_ZOMBIE);
             GC_ASSERT(page->heap->final_slots_count > 0);
-- 
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