nits

src/complexagent.rs

@@ -363,7 +363,9 @@ impl Agent for ComplexAgent {
         println!("# of moves stored: {}", self.future_moves.arena.len());
 
         self.future_moves.best_move().inspect(|&(i, j)| {
-            self.future_moves.update_root_coord(i, j);
+            if !self.future_moves.update_root_coord(i, j) {
+                panic!("update_root_coord failed");
+            }
         })
     }