From c5cb2def06c210a99a7299cfed67826b22452cf8 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Tue, 4 Jan 2022 16:57:16 +0100
Subject: [PATCH] Fix variance of thread::Scope.

---
 library/std/src/thread/scoped.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/std/src/thread/scoped.rs b/library/std/src/thread/scoped.rs
index 0db938b9f39..cb5f48e5107 100644
--- a/library/std/src/thread/scoped.rs
+++ b/library/std/src/thread/scoped.rs
@@ -11,7 +11,7 @@
 /// See [`scope`] for details.
 pub struct Scope<'env> {
     data: ScopeData,
-    env: PhantomData<&'env ()>,
+    env: PhantomData<&'env mut &'env ()>,
 }
 
 /// An owned permission to join on a scoped thread (block on its termination).