From 7d89e46f65fb5cafa6528c3ff39e4a53d83e99ec Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 14 May 2025 14:24:57 +0200
Subject: [PATCH] Sync: Support moving out of another Sync

---
 src/libutil/include/nix/util/sync.hh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libutil/include/nix/util/sync.hh b/src/libutil/include/nix/util/sync.hh
index 0c3e1f528..4b9d546d2 100644
--- a/src/libutil/include/nix/util/sync.hh
+++ b/src/libutil/include/nix/util/sync.hh
@@ -39,6 +39,7 @@ public:
     SyncBase() { }
     SyncBase(const T & data) : data(data) { }
     SyncBase(T && data) noexcept : data(std::move(data)) { }
+    SyncBase(SyncBase && other) noexcept : data(std::move(*other.lock())) { }
 
     template<class L>
     class Lock