From a7158bfb626c7cf34acea57f9410c34a0f52d515 Mon Sep 17 00:00:00 2001
From: PHIDIAS <phidias@aperx.org>
Date: Mon, 12 Oct 2026 23:21:10 +0900
Subject: [PATCH] 1.0.5 RC11

---
 instance.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/instance.ts b/instance.ts
index 772d943..b623f2f 100644
--- a/instance.ts
+++ b/instance.ts
@@ -22,7 +22,7 @@ function parse_save(line: string): number | null {
     const m = SAVE_LINE_RE.exec(line);
     if (!m) return null;
     const slot = AUTOSAVE_NAME_RE.exec(m[1]);
-    return slot ? Number(slot[1]) : undefined;
+    return slot ? Number(slot[1]) : null;
 }
 
 export default async function(context: InstancePluginContext) {