From 7a56763a4715aa61024bb31a6f2b5455ea1207ea Mon Sep 17 00:00:00 2001
From: melvinzhang <melvinzhang@gmail.com>
Date: Wed, 29 Apr 2015 21:24:52 +0800
Subject: [PATCH] compute child desc before executeNextEvent as the
 executeEvent may alter result of choice[0].toString, for example, in the case
 of revealing cards

---
 src/magic/ai/MCTSAI.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/magic/ai/MCTSAI.java b/src/magic/ai/MCTSAI.java
index e96956d55b..c00e12d3c5 100644
--- a/src/magic/ai/MCTSAI.java
+++ b/src/magic/ai/MCTSAI.java
@@ -378,9 +378,10 @@ public class MCTSAI implements MagicAI {
             if (curr.size() < choices.size()) {
                 final int idx = curr.size();
                 final Object[] choice = choices.get(idx);
+                final String choiceStr = MCTSGameTree.obj2String(choice[0]);
                 game.executeNextEvent(choice);
                 final MCTSGameTree child = new MCTSGameTree(curr, idx, game.getScore());
-                assert (child.desc = MCTSGameTree.obj2String(choice[0])).equals(child.desc);
+                assert (child.desc = choiceStr).equals(child.desc);
                 curr.addChild(child);
                 path.add(child);
                 return path;