multicore: Fix bug in log::error invocation

src/multicore.rs

@@ -108,7 +108,7 @@ mod implementation {
             if THREAD_POOL.current_thread_index().is_some() {
                 let msg = "wait() cannot be called from within the worker thread pool since that would lead to deadlocks";
                 // panic! doesn't necessarily kill the process, so we log as well.
-                error!(msg);
+                error!("{}", msg);
                 panic!(msg);
             }
             self.receiver.recv().unwrap()