From 627836b745738183a25c356057eefe0582a615ff Mon Sep 17 00:00:00 2001
From: Petr Baudis <pasky@ucw.cz>
Date: Tue, 22 Sep 2009 19:26:23 +0200
Subject: [PATCH] tree_unlink_node(): Also set sibling etc. to NULL within node
 itself

---
 uct/tree.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/uct/tree.c b/uct/tree.c
index dd3bfc0..fb3d432 100644
--- a/uct/tree.c
+++ b/uct/tree.c
@@ -447,6 +447,8 @@ tree_unlink_node(struct tree_node *node)
 			ni = ni->sibling;
 		ni->sibling = node->sibling;
 	}
+	node->sibling = NULL;
+	node->parent = NULL;
 }
 
 void
@@ -464,7 +466,6 @@ tree_promote_node(struct tree *tree, struct tree_node *node)
 	tree_done_node(tree, tree->root);
 	tree->root = node;
 	board_symmetry_update(tree->board, &tree->root_symmetry, node->coord);
-	node->parent = NULL;
 }
 
 bool
-- 
2.11.4.GIT