From 94e150a522ce4c1abad5f00223a8a940f3a5b6e0 Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Sat, 14 Mar 2026 19:08:13 +0100
Subject: [PATCH] fix(kqueue): fix an unlocked snapshots usage

---
 src/backend/KQueue.zig | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/backend/KQueue.zig b/src/backend/KQueue.zig
index 74b6232..a82011f 100644
--- a/src/backend/KQueue.zig
+++ b/src/backend/KQueue.zig
@@ -419,7 +419,10 @@ pub fn remove_watch(self: *@This(), allocator: std.mem.Allocator, path: []const
         std.posix.close(entry.value);
         allocator.free(entry.key);
     }
-    if (self.snapshots.fetchRemove(path)) |entry| {
+    self.snapshots_mutex.lock();
+    const snap_entry = self.snapshots.fetchRemove(path);
+    self.snapshots_mutex.unlock();
+    if (snap_entry) |entry| {
         var names = entry.value;
         var it = names.iterator();
         while (it.next()) |ne| {