From 0f408602cbcdc33faf4e2b545a7b62718e401807 Mon Sep 17 00:00:00 2001
From: Kunshan Wang <wks1986@gmail.com>
Date: Thu, 17 Jul 2025 22:44:02 +0800
Subject: [PATCH] Fix missing increment of deleted_entries

When `rb_concurrent_set_foreach_with_replace` deletes entries from a
concurrent set, it should increment the `deleted_entries` field, too.
---
 concurrent_set.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/concurrent_set.c b/concurrent_set.c
index ec1e7ef307..ffbd028a2c 100644
--- a/concurrent_set.c
+++ b/concurrent_set.c
@@ -402,6 +402,7 @@ rb_concurrent_set_foreach_with_replace(VALUE set_obj, int (*callback)(VALUE *key
                 return;
               case ST_DELETE:
                 set->entries[i].key = CONCURRENT_SET_DELETED;
+                set->deleted_entries++;
                 break;
             }
             break;