1 files changed, 6 insertions, 0 deletions

diff --git a/embassy-sync/tests/ui/sync_impl/once_lock.rs b/embassy-sync/tests/ui/sync_impl/once_lock.rs
new file mode 100644
index 000000000..8f50d583b
--- /dev/null
+++ b/embassy-sync/tests/ui/sync_impl/once_lock.rs
@@ -0,0 +1,6 @@
+use embassy_sync::once_lock::OnceLock;
+
+// *mut u8 is not Sync, so OnceLock should not implement Sync for this type. This should fail to compile.
+static GLOBAL: OnceLock<*mut u8> = OnceLock::new();
+
+fn main() {}