From e41240e45b58ea1bcf42fe5503cafec4c9dca1a8 Mon Sep 17 00:00:00 2001
From: John Kåre Alsaker <john.kare.alsaker@gmail.com>
Date: Tue, 22 Aug 2023 02:36:41 +0200
Subject: Fix races conditions with `SyntaxContext` decoding

---
 compiler/rustc_data_structures/src/sync/worker_local.rs | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'compiler/rustc_data_structures/src/sync')

diff --git a/compiler/rustc_data_structures/src/sync/worker_local.rs b/compiler/rustc_data_structures/src/sync/worker_local.rs
index 8c84daf4f16..27d687c3cfe 100644
--- a/compiler/rustc_data_structures/src/sync/worker_local.rs
+++ b/compiler/rustc_data_structures/src/sync/worker_local.rs
@@ -171,3 +171,9 @@ impl<T> Deref for WorkerLocal<T> {
         unsafe { &self.locals.get_unchecked(self.registry.id().verify()).0 }
     }
 }
+
+impl<T: Default> Default for WorkerLocal<T> {
+    fn default() -> Self {
+        WorkerLocal::new(|_| T::default())
+    }
+}
-- 
cgit 1.4.1-3-g733a5