From 1ebfeb9f65c242ba6dff887ca4717acc6007a0de Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Tue, 22 Apr 2025 15:55:21 -0400
Subject: [PATCH] refocus_tree: clear arena on no root

---
 src/logic/future_moves.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/logic/future_moves.rs b/src/logic/future_moves.rs
index fa3efd9..c327ad9 100644
--- a/src/logic/future_moves.rs
+++ b/src/logic/future_moves.rs
@@ -535,6 +535,8 @@ impl FutureMoves {
     /// Rebuilds the Arena based on `self.current_root`, prunes unrelated nodes
     fn refocus_tree(&mut self) {
         let Some(root) = self.current_root else {
+            // handle current_root being empty (clear arena and return)
+            self.arena.clear();
             return;
         };