From 5a80b48fe17f8ea772125dbc5220a134b1b15c68 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Thu, 24 Oct 2024 11:37:35 +0200
Subject: [PATCH] Use Send + Sync for spawn hooks.

---
 library/std/src/thread/spawnhook.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/std/src/thread/spawnhook.rs b/library/std/src/thread/spawnhook.rs
index b0732ae69c3..f9a4a2e0da7 100644
--- a/library/std/src/thread/spawnhook.rs
+++ b/library/std/src/thread/spawnhook.rs
@@ -24,7 +24,7 @@ impl Drop for SpawnHooks {
 }
 
 struct SpawnHook {
-    hook: Box<dyn Sync + Fn(&Thread) -> Box<dyn Send + FnOnce()>>,
+    hook: Box<dyn Send + Sync + Fn(&Thread) -> Box<dyn Send + FnOnce()>>,
     next: Option<Arc<SpawnHook>>,
 }
 
@@ -86,7 +86,7 @@ struct SpawnHook {
 #[unstable(feature = "thread_spawn_hook", issue = "none")]
 pub fn add_spawn_hook<F, G>(hook: F)
 where
-    F: 'static + Sync + Fn(&Thread) -> G,
+    F: 'static + Send + Sync + Fn(&Thread) -> G,
     G: 'static + Send + FnOnce(),
 {
     SPAWN_HOOKS.with(|h| {