diff --git a/rust-version b/rust-version
index 0909f24752ac..0b9f9bba0ad4 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-4fd4de7ea358ad6fc28c5780533ea8ccc09e1006
+9353538c7bea6edb245457712cec720305c4576e
diff --git a/tests/pass/concurrency/sync_nopreempt.rs b/tests/pass/concurrency/sync_nopreempt.rs
index a53f143fef67..83ecd72ce8da 100644
--- a/tests/pass/concurrency/sync_nopreempt.rs
+++ b/tests/pass/concurrency/sync_nopreempt.rs
@@ -16,7 +16,7 @@ fn check_conditional_variables_notify_all() {
                 let (lock, cvar) = &*pair2;
                 let guard = lock.lock().unwrap();
                 // Block waiting on the conditional variable.
-                let _ = cvar.wait(guard).unwrap();
+                let _x = cvar.wait(guard).unwrap();
             })
         })
         .inspect(|_| {