From 7979c009a762d9b447f7ef286af2d314b7c11a6c Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Fri, 27 Oct 2023 11:00:12 -0400
Subject: [PATCH] Fix bug for removed weak references

rb_darray_foreach gives a pointer to the entry, so we need to deference
it to read the value.
---
 gc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gc.c b/gc.c
index fce9202d9f..6f13ff9284 100644
--- a/gc.c
+++ b/gc.c
@@ -8281,7 +8281,7 @@ gc_update_weak_references(rb_objspace_t *objspace)
     size_t retained_weak_references_count = 0;
     VALUE **ptr_ptr;
     rb_darray_foreach(objspace->weak_references, i, ptr_ptr) {
-        if (!ptr_ptr) continue;
+        if (!*ptr_ptr) continue;
 
         VALUE obj = **ptr_ptr;