From c30a3ed027f2ea03d98aedf677368542ee6ca873 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Mon, 30 Sep 2024 18:17:42 +0900
Subject: [PATCH] Fix the last character index in an assertion

Also, when `RUBY_DEBUG` is enabled, objects allocated in shared-gc
fail at `rb_ractor_confirm_belonging`, so assert it always.
---
 gc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gc.c b/gc.c
index c1a9b600448d7e..ba7007da39da8c 100644
--- a/gc.c
+++ b/gc.c
@@ -658,7 +658,7 @@ static void
 ruby_external_gc_init(void)
 {
     // Assert that the directory path ends with a /
-    GC_ASSERT(SHARED_GC_DIR[strlen(SHARED_GC_DIR) - 2] == '/');
+    RUBY_ASSERT_ALWAYS(SHARED_GC_DIR[sizeof(SHARED_GC_DIR) - 2] == '/');
 
     char *gc_so_file = getenv(RUBY_GC_LIBRARY);