From 11ec7c078896d3963969f55c40aff5042f693025 Mon Sep 17 00:00:00 2001
From: Nixon <43715558+nixonyh@users.noreply.github.com>
Date: Fri, 5 Jun 2026 23:39:46 +0800
Subject: [PATCH] Hot fix scope not checking key generation

---
 src/lib.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index d70ab41..58c393b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -195,6 +195,11 @@ impl<T> SparseMap<T> {
     where
         F: FnOnce(&mut Self, &mut T) -> R,
     {
+        let generation = self.generations.get(key.index)?;
+        if *generation != key.generation {
+            return None;
+        }
+
         let mut value = self.buffer[key.index].take()?;
         let result = f(self, &mut value);
         self.buffer[key.index] = Some(value);