Fix getTotalPreventionShieldAmount (#3654)

* Fix scripts

* Fix damage prevention display

* Optimize attachment tracking for netplay

* Phasing fix

* Fix NPE

* Tweak logic order

* Clean up

* Fix scripts

* Clean up

* Fix FailedToTarget

---------

Co-authored-by: TRT <>

forge-ai/src/main/java/forge/ai/ComputerUtilCost.java

@@ -398,10 +398,8 @@ public class ComputerUtilCost {
             return false;
         }
         for (final CostPart part : cost.getCostParts()) {
-            if (part instanceof CostSacrifice) {
+            if (part instanceof CostSacrifice && part.payCostFromSource()) {
-                if ("CARDNAME".equals(part.getType())) {
+                return true;
-                    return true;
-                }
             }
         }
         return false;

forge-ai/src/main/java/forge/ai/ability/DamagePreventAi.java

@@ -85,7 +85,7 @@ public class DamagePreventAi extends SpellAbilityAi {
             // check stack for something on the stack will kill anything i control
             final List<GameObject> objects = ComputerUtil.predictThreatenedObjects(sa.getActivatingPlayer(), sa);
 
-            if (objects.contains(ai)) {
+            if (objects.contains(ai) && sa.canTarget(ai)) {
             	tcs.add(ai);
                 chance = true;
             }

forge-ai/src/main/java/forge/ai/ability/EffectAi.java

@@ -216,6 +216,7 @@ public class EffectAi extends SpellAbilityAi {
             } else if (logic.equals("Fight")) {
                 return FightAi.canFightAi(ai, sa, 0, 0);
             } else if (logic.equals("Pump")) {
+                sa.resetTargets();
                 List<Card> options = CardUtil.getValidCardsToTarget(sa);
                 options = CardLists.filterControlledBy(options, ai);
                 if (sa.getPayCosts().hasTapCost()) {

forge-ai/src/main/java/forge/ai/ability/ManaEffectAi.java

@@ -89,7 +89,7 @@ public class ManaEffectAi extends SpellAbilityAi {
         if (logic.startsWith("ManaRitual")) {
              return ph.is(PhaseType.MAIN2, ai) || ph.is(PhaseType.MAIN1, ai);
         } else if ("AtOppEOT".equals(logic)) {
-            return !ai.getManaPool().hasBurn() && ph.is(PhaseType.END_OF_TURN) && ph.getNextTurn() == ai;
+            return (!ai.getManaPool().hasBurn() || !ai.canLoseLife() || ai.cantLoseForZeroOrLessLife()) && ph.is(PhaseType.END_OF_TURN) && ph.getNextTurn() == ai;
         }
         return super.checkPhaseRestrictions(ai, sa, ph, logic);
     }
@@ -261,7 +261,8 @@ public class ManaEffectAi extends SpellAbilityAi {
     }
 
     private boolean improvesPosition(Player ai, SpellAbility sa) {
-        boolean activateForTrigger = Iterables.any(Iterables.filter(sa.getHostCard().getTriggers(), CardTraitPredicates.hasParam("AILogic", "ActivateOnce")),
+        boolean activateForTrigger = (!ai.getManaPool().hasBurn() || !ai.canLoseLife() || ai.cantLoseForZeroOrLessLife()) &&
+                Iterables.any(Iterables.filter(sa.getHostCard().getTriggers(), CardTraitPredicates.hasParam("AILogic", "ActivateOnce")),
                 t -> sa.getHostCard().getAbilityActivatedThisTurn(t.getOverridingAbility()) == 0);
 
         PhaseHandler ph = ai.getGame().getPhaseHandler();

forge-game/src/main/java/forge/game/GameEntityView.java

@@ -1,6 +1,7 @@
 package forge.game;
 
-import forge.game.card.CardCollectionView;
+import com.google.common.collect.Iterables;
+
 import forge.game.card.CardView;
 import forge.trackable.TrackableCollection;
 import forge.trackable.TrackableObject;
@@ -45,35 +46,34 @@ public abstract class GameEntityView extends TrackableObject {
     public int getPreventNextDamage() {
         return get(TrackableProperty.PreventNextDamage);
     }
-    protected void updatePreventNextDamage(GameEntity e) {
+    public void updatePreventNextDamage(GameEntity e) {
         set(TrackableProperty.PreventNextDamage, e.getPreventNextDamageTotalShields());
     }
 
     public Iterable<CardView> getAttachedCards() {
-        return get(TrackableProperty.AttachedCards);
+        if (hasAnyCardAttachments()) {
+            Iterable<CardView> active = Iterables.filter(get(TrackableProperty.AttachedCards), c -> !c.isPhasedOut());
+            if (!Iterables.isEmpty(active)) {
+                return active;
+            }
+        }
+        return null;
     }
     public boolean hasCardAttachments() {
         return getAttachedCards() != null;
     }
     public Iterable<CardView> getAllAttachedCards() {
-        return get(TrackableProperty.AllAttachedCards);
+        return get(TrackableProperty.AttachedCards);
     }
     public boolean hasAnyCardAttachments() {
         return getAllAttachedCards() != null;
     }
 
     protected void updateAttachedCards(GameEntity e) {
-        if (e.hasCardAttachments()) {
+        if (!e.getAllAttachedCards().isEmpty()) {
-            set(TrackableProperty.AttachedCards, CardView.getCollection(e.getAttachedCards()));
+            set(TrackableProperty.AttachedCards, CardView.getCollection(e.getAllAttachedCards()));
-        }
-        else {
-            set(TrackableProperty.AttachedCards, null);
-        }
-        CardCollectionView all = e.getAllAttachedCards();
-        if (all.isEmpty()) {
-            set(TrackableProperty.AllAttachedCards, null);
         } else {
-            set(TrackableProperty.AllAttachedCards, CardView.getCollection(all));
+            set(TrackableProperty.AttachedCards, null);
         }
     }
 }

forge-game/src/main/java/forge/game/ability/AbilityUtils.java

@@ -1999,13 +1999,6 @@ public class AbilityUtils {
             return doXMath(calculateAmount(c, sq[c.isOptionalCostPaid(OptionalCost.Generic) ? 1 : 2], ctb), expr, c, ctb);
         }
 
-        if (sq[0].equals("TotalDamageDoneByThisTurn")) {
-            return doXMath(c.getTotalDamageDoneBy(), expr, c, ctb);
-        }
-        if (sq[0].equals("TotalDamageReceivedThisTurn")) {
-            return doXMath(c.getAssignedDamage(), expr, c, ctb);
-        }
-
         if (sq[0].contains("CardPower")) {
             return doXMath(c.getNetPower(), expr, c, ctb);
         }
@@ -2335,6 +2328,13 @@ public class AbilityUtils {
             return doXMath(player.getOpponentsTotalPoisonCounters(), expr, c, ctb);
         }
 
+        if (sq[0].equals("TotalDamageDoneByThisTurn")) {
+            return doXMath(c.getTotalDamageDoneBy(), expr, c, ctb);
+        }
+        if (sq[0].equals("TotalDamageReceivedThisTurn")) {
+            return doXMath(c.getAssignedDamage(), expr, c, ctb);
+        }
+
         if (sq[0].equals("MaxOppDamageThisTurn")) {
             return doXMath(player.getMaxOpponentAssignedDamage(), expr, c, ctb);
         }
@@ -3493,6 +3493,7 @@ public class AbilityUtils {
         if (value.equals("RingTemptedYou")) {
             return doXMath(player.getNumRingTemptedYou(), m, source, ctb);
         }
+
         if (value.startsWith("DungeonCompletedNamed")) {
             String [] full = value.split("_");
             String name = full[1];

forge-game/src/main/java/forge/game/ability/effects/DamagePreventEffectBase.java

@@ -4,12 +4,13 @@ import java.util.List;
 
 import forge.GameCommand;
 import forge.game.Game;
-import forge.game.GameObject;
+import forge.game.GameEntity;
 import forge.game.ability.AbilityFactory;
 import forge.game.ability.AbilityKey;
 import forge.game.ability.AbilityUtils;
 import forge.game.ability.SpellAbilityEffect;
 import forge.game.card.Card;
+import forge.game.event.GameEventPlayerStatsChanged;
 import forge.game.player.Player;
 import forge.game.replacement.ReplacementEffect;
 import forge.game.replacement.ReplacementHandler;
@@ -20,7 +21,7 @@ import forge.game.zone.ZoneType;
 import forge.util.TextUtil;
 
 public abstract class DamagePreventEffectBase extends SpellAbilityEffect {
-    public static void addPreventNextDamage(SpellAbility sa, GameObject o, int numDam) {
+    public static void addPreventNextDamage(SpellAbility sa, GameEntity o, int numDam) {
         final Card hostCard = sa.getHostCard();
         final Game game = hostCard.getGame();
         final Player player = hostCard.getController();
@@ -40,9 +41,9 @@ public abstract class DamagePreventEffectBase extends SpellAbilityEffect {
         if (sa.hasParam("PreventionSubAbility")) {
             String subAbString = sa.getSVar(sa.getParam("PreventionSubAbility"));
             if (sa.hasParam("ShieldEffectTarget")) {
-                List<GameObject> effTgts = AbilityUtils.getDefinedObjects(hostCard, sa.getParam("ShieldEffectTarget"), sa);
+                List<GameEntity> effTgts = AbilityUtils.getDefinedEntities(hostCard, sa.getParam("ShieldEffectTarget"), sa);
                 String effTgtString = "";
-                for (final GameObject effTgt : effTgts) {
+                for (final GameEntity effTgt : effTgts) {
                     if (effTgt instanceof Card) {
                         effTgtString = "CardUID_" + String.valueOf(((Card) effTgt).getId());
                     } else if (effTgt instanceof Player) {
@@ -70,12 +71,21 @@ public abstract class DamagePreventEffectBase extends SpellAbilityEffect {
         eff.updateStateForView();
         game.getTriggerHandler().clearSuppression(TriggerType.ChangesZone);
 
+        o.getView().updatePreventNextDamage(o);
+        if (o instanceof Player) {
+            game.fireEvent(new GameEventPlayerStatsChanged((Player) o, false));
+        }
+
         game.getEndOfTurn().addUntil(new GameCommand() {
             private static final long serialVersionUID = 1L;
 
             @Override
             public void run() {
                 game.getAction().exile(eff, null);
+                o.getView().updatePreventNextDamage(o);
+                if (o instanceof Player) {
+                    game.fireEvent(new GameEventPlayerStatsChanged((Player) o, false));
+                }
             }
         });
     }

forge-game/src/main/java/forge/game/card/Card.java

@@ -5636,7 +5636,7 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
     /**
      * Gets the total damage done by card this turn (after prevention and redirects).
      *
-     * @return the damage done to player p this turn
+     * @return the damage done by the card this turn
      */
     public final int getTotalDamageDoneBy() {
         return getDamageHistory().getDamageDoneThisTurn(null, false, null, null, this, getController(), null);

forge-game/src/main/java/forge/game/card/CardDamageMap.java

@@ -19,6 +19,7 @@ import forge.game.Game;
 import forge.game.GameEntity;
 import forge.game.GameObjectPredicates;
 import forge.game.ability.AbilityKey;
+import forge.game.event.GameEventPlayerStatsChanged;
 import forge.game.player.Player;
 import forge.game.player.PlayerCollection;
 import forge.game.spellability.SpellAbility;
@@ -48,6 +49,11 @@ public class CardDamageMap extends ForwardingTable<Card, GameEntity, Integer> {
                 runParams.put(AbilityKey.IsCombatDamage, isCombat);
 
                 ge.getGame().getTriggerHandler().runTrigger(TriggerType.DamagePreventedOnce, runParams, false);
+
+                ge.getView().updatePreventNextDamage(ge);
+                if (ge instanceof Player) {
+                    ge.getGame().fireEvent(new GameEventPlayerStatsChanged((Player) ge, false));
+                }
             }
         }
     }

forge-game/src/main/java/forge/game/combat/AttackConstraints.java

@@ -362,7 +362,6 @@ public class AttackConstraints {
         MapToAmount<GameEntity> sortedPlayerReqs = new LinkedHashMapToAmount<>();
         sortedPlayerReqs.addAll(Iterables.concat(playerReqs));
         while (!sortedPlayerReqs.isEmpty()) {
-            sortedPlayerReqs.keySet().removeAll(excludedDefenders);
             Pair<GameEntity, Integer> playerReq = MapToAmountUtil.max(sortedPlayerReqs);
             // find best attack to also fulfill the additional requirements
             Attack bestMatch = Iterables.getLast(Iterables.filter(result, att -> !usedAttackers.contains(att.attacker) && att.defender.equals(playerReq.getLeft())), null);
@@ -376,6 +375,7 @@ public class AttackConstraints {
             } else {
                 excludedDefenders.add(playerReq.getLeft());
             }
+            sortedPlayerReqs.keySet().removeAll(excludedDefenders);
         }
         if (!usedAttackers.isEmpty()) {
             // order could have changed

forge-game/src/main/java/forge/game/phase/Untap.java

@@ -42,6 +42,7 @@ import forge.game.keyword.KeywordInterface;
 import forge.game.player.Player;
 import forge.game.player.PlayerController.BinaryChoiceType;
 import forge.game.spellability.SpellAbility;
+import forge.game.staticability.StaticAbilityCantPhaseOut;
 import forge.game.zone.ZoneType;
 
 /**
@@ -266,14 +267,14 @@ public class Untap extends Phase {
         // If c is attached to something, it will phase out on its own, and try
         // to attach back to that thing when it comes back
         for (final Card c : list) {
-            if (c.isPhasedOut()) {
+            if (c.isPhasedOut() && c.isDirectlyPhasedOut()) {
                 c.phase(true);
             } else if (c.hasKeyword(Keyword.PHASING)) {
                 // CR 702.26h If an object would simultaneously phase out directly
                 // and indirectly, it just phases out indirectly.
                 if (c.isAttachment()) {
                     final Card ent = c.getAttachedTo();
-                    if (ent != null && list.contains(ent)) {
+                    if (ent != null && list.contains(ent) && !StaticAbilityCantPhaseOut.cantPhaseOut(ent)) {
                         continue;
                     }
                 }

forge-game/src/main/java/forge/game/replacement/ReplacementEffect.java

@@ -145,7 +145,6 @@ public abstract class ReplacementEffect extends TriggerReplacementBase {
     public boolean requirementsCheck(Game game) {
         return this.requirementsCheck(game, this.getMapParams());
     }
-
     public boolean requirementsCheck(Game game, Map<String,String> params) {
         if (this.isSuppressed()) {
             return false; // Effect removed by effect

forge-game/src/main/java/forge/game/replacement/ReplacementHandler.java

@@ -911,7 +911,8 @@ public class ReplacementHandler {
                             && re.hasParam("PreventionEffect")
                             && re.zonesCheck(game.getZoneOf(c))
                             && re.getOverridingAbility() != null
-                            && re.getOverridingAbility().getApi() == ApiType.ReplaceDamage) {
+                            && re.getOverridingAbility().getApi() == ApiType.ReplaceDamage
+                            && re.matchesValidParam("ValidTarget", o)) {
                         list.add(re);
                     }
                 }

forge-game/src/main/java/forge/trackable/TrackableProperty.java

@@ -14,7 +14,6 @@ public enum TrackableProperty {
     Text(TrackableTypes.StringType),
     PreventNextDamage(TrackableTypes.IntegerType),
     AttachedCards(TrackableTypes.CardViewCollectionType),
-    AllAttachedCards(TrackableTypes.CardViewCollectionType),
     Counters(TrackableTypes.CounterMapType),
     CurrentPlane(TrackableTypes.StringType),
     PlanarPlayer(TrackableTypes.PlayerViewType),

forge-gui-desktop/src/main/java/forge/view/arcane/PlayArea.java

@@ -595,8 +595,7 @@ public class PlayArea extends CardPanelContainer implements CardPanelMouseListen
             Iterable<CardView> cards = model.getCards(zone);
             if (cards != null) {
                 modelCopy = Lists.newArrayList(cards);
-            }
+            } else {
-            else {
                 modelCopy = Lists.newArrayList();
             }
         }
@@ -648,17 +647,17 @@ public class PlayArea extends CardPanelContainer implements CardPanelMouseListen
             doLayout();
         }
 
-	invalidate(); //pfps do the extra invalidate before any scrolling 
+        invalidate(); //pfps do the extra invalidate before any scrolling 
         if (!newPanels.isEmpty()) {
-	    int i = newPanels.size();
+            int i = newPanels.size();
             for (final CardPanel toPanel : newPanels) {
-		if ( --i == 0 ) { // only scroll to last panel to be added
+                if ( --i == 0 ) { // only scroll to last panel to be added
-		    scrollRectToVisible(new Rectangle(toPanel.getCardX(), toPanel.getCardY(), toPanel.getCardWidth(), toPanel.getCardHeight()));
+                    scrollRectToVisible(new Rectangle(toPanel.getCardX(), toPanel.getCardY(), toPanel.getCardWidth(), toPanel.getCardHeight()));
-		}
+                }
                 Animation.moveCard(toPanel);
             }
-	}
+        }
-	repaint();
+        repaint();
     }
 
     public boolean updateCard(final CardView card, boolean fromRefresh) {

forge-gui/res/cardsfolder/b/break_of_day.txt

@@ -2,5 +2,6 @@ Name:Break of Day
 ManaCost:1 W
 Types:Instant
 A:SP$ PumpAll | Cost$ 1 W | ValidCards$ Creature.YouCtrl | NumAtt$ +1 | NumDef$ +1 | SubAbility$ FatefulHourPump | SpellDescription$ Creatures you control get +1/+1 until end of turn.
-SVar:FatefulHourPump:DB$ PumpAll | ValidCards$ Creature.YouCtrl | KW$ Indestructible | FatefulHour$ True | SpellDescription$ Fateful hour — If you have 5 or less life, those creatures gain indestructible until end of turn.
+SVar:FatefulHourPump:DB$ PumpAll | ValidCards$ Creature.YouCtrl | KW$ Indestructible | ConditionCheckSVar$ FatefulHour | ConditionSVarCompare$ LE5 | SpellDescription$ Fateful hour — If you have 5 or less life, those creatures gain indestructible until end of turn.
+SVar:FatefulHour:Count$YourLifeTotal
 Oracle:Creatures you control get +1/+1 until end of turn.\nFateful hour — If you have 5 or less life, those creatures gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

forge-gui/res/cardsfolder/o/ogre_slumlord.txt

@@ -2,7 +2,7 @@ Name:Ogre Slumlord
 ManaCost:3 B B
 Types:Creature Ogre Rogue
 PT:3/3
-T:Mode$ ChangesZone | Origin$ Battlefield | Destination$ Graveyard | ValidCard$ Creature.nonToken+Other | TriggerZones$ Battlefield | Execute$ TrigToken | TriggerDescription$ Whenever another nontoken creature dies, you may create a 1/1 black Rat creature token.
+T:Mode$ ChangesZone | Origin$ Battlefield | Destination$ Graveyard | ValidCard$ Creature.nonToken+Other | OptionalDecider$ You | TriggerZones$ Battlefield | Execute$ TrigToken | TriggerDescription$ Whenever another nontoken creature dies, you may create a 1/1 black Rat creature token.
 SVar:TrigToken:DB$ Token | TokenAmount$ 1 | TokenScript$ b_1_1_rat | TokenOwner$ You
 S:Mode$ Continuous | Affected$ Creature.Rat+YouCtrl | AddKeyword$ Deathtouch | Description$ Rats you control have deathtouch.
 DeckHas:Ability$Token

forge-gui/res/cardsfolder/o/omarthis_ghostfire_initiate.txt

@@ -4,7 +4,7 @@ Types:Legendary Creature Spirit Naga
 PT:0/0
 K:etbCounter:P1P1:X
 SVar:X:Count$xPaid
-T:Mode$ CounterAddedOnce | ValidCard$ Creature.Other+inZoneBattlefield+Colorless | OptionalDecider$ You | TriggerZones$ Battlefield | CounterType$ P1P1 | Execute$ TrigPutCounter | TriggerDescription$ Whenever you put one or more +1/+1 counters on another colorless creature, you may put a +1/+1 counter on NICKNAME.
+T:Mode$ CounterAddedOnce | ValidCard$ Creature.Other+inZoneBattlefield+Colorless | ValidPlayer$ You | OptionalDecider$ You | TriggerZones$ Battlefield | CounterType$ P1P1 | Execute$ TrigPutCounter | TriggerDescription$ Whenever you put one or more +1/+1 counters on another colorless creature, you may put a +1/+1 counter on NICKNAME.
 SVar:TrigPutCounter:DB$ PutCounter | CounterType$ P1P1 | CounterNum$ 1
 T:Mode$ ChangesZone | Origin$ Battlefield | Destination$ Graveyard | ValidCard$ Card.Self | Execute$ TrigManifest | TriggerDescription$ When NICKNAME dies, manifest a number of cards from the top of your library equal to the number of counters on it.
 SVar:TrigManifest:DB$ Manifest | Amount$ Y | Defined$ TopOfLibrary

forge-gui/res/cardsfolder/o/one_with_the_kami.txt

@@ -4,7 +4,7 @@ Types:Enchantment Aura
 K:Flash
 K:Enchant creature you control
 A:SP$ Attach | ValidTgts$ Creature.YouCtrl | TgtPrompt$ Select target creature you control | AILogic$ Pump
-T:Mode$ ChangesZone | ValidCard$ Creature.EnchantedBy,Creature.modified+NotEnchantedBy | Origin$ Battlefield | Destination$ Graveyard | Execute$ TrigToken | TriggerDescription$ Whenever enchanted creature or another modified creature you control dies, create X 1/1 colorless Spirit creature tokens, where X is that creature's power. (Equipment, Auras you control, and counters are modifications.)
+T:Mode$ ChangesZone | ValidCard$ Creature.EnchantedBy,Creature.YouCtrl+modified+NotEnchantedBy | Origin$ Battlefield | Destination$ Graveyard | Execute$ TrigToken | TriggerDescription$ Whenever enchanted creature or another modified creature you control dies, create X 1/1 colorless Spirit creature tokens, where X is that creature's power. (Equipment, Auras you control, and counters are modifications.)
 SVar:TrigToken:DB$ Token | TokenScript$ c_1_1_spirit | TokenAmount$ X
 SVar:X:TriggeredCard$CardPower
 DeckHas:Ability$Token & Type$Spirit

forge-gui/res/cardsfolder/t/treasure_nabber.txt

@@ -3,5 +3,5 @@ ManaCost:2 R
 Types:Creature Goblin Rogue
 PT:3/2
 T:Mode$ TapsForMana | ValidCard$ Artifact | Activator$ Opponent | TriggerZones$ Battlefield | Execute$ TrigControl | TriggerDescription$ Whenever an opponent taps an artifact for mana, gain control of that artifact until the end of your next turn.
-SVar:TrigControl:DB$ GainControl | Defined$ TriggeredCard | LoseControl$ UntilTheEndOfYourNextTurn
+SVar:TrigControl:DB$ GainControl | Defined$ TriggeredCardLKICopy | LoseControl$ UntilTheEndOfYourNextTurn
 Oracle:Whenever an opponent taps an artifact for mana, gain control of that artifact until the end of your next turn.

forge-gui/res/cardsfolder/u/unexpected_allies.txt

@@ -2,7 +2,7 @@ Name:Unexpected Allies
 ManaCost:1 R
 Types:Sorcery
 A:SP$ Pump | ValidTgts$ Creature.YouCtrl+nonToken | TgtPrompt$ Select target nontoken creature you control | KW$ Double team | NumAtt$ 2 | SubAbility$ TrigEffect | SpellDescription$ Target nontoken creature you control gets +2/+0 and gains double team until end of turn. It also gains first strike until end of turn if it has the same name as another creature you control or a creature card in your graveyard.
-SVar:TrigEffect:DB$ Pump | ConditionCheckSVar$ X | Defined$ Targeted | KW$ First strike 
+SVar:TrigEffect:DB$ Pump | ConditionCheckSVar$ X | Defined$ Targeted | KW$ First Strike 
 SVar:X:Count$Valid Creature.NotDefinedTargeted+YouCtrl+sharesNameWith Targeted/Plus.Y
 SVar:Y:Count$ValidGraveyard Creature.YouOwn+sharesNameWith Targeted
 DeckHas:Keyword$Double Team|First Strike

forge-gui/src/main/java/forge/gamemodes/match/input/InputAttack.java

@@ -69,7 +69,6 @@ public class InputAttack extends InputSyncronizedBase {
 
     @Override
     public final void showMessage() {
-        // TODO still seems to have some issues with multiple planeswalkers
         setCurrentDefender(defenders.getFirst());
 
         if (currentDefender == null) {
@@ -295,7 +294,9 @@ public class InputAttack extends InputSyncronizedBase {
                 getController().getGui().setHighlighted(PlayerView.get((Player) ge), ge == def);
             }
         }
-        potentialBanding = isBandingPossible();
+        if (def != null) {
+            potentialBanding = isBandingPossible();
+        }
 
         updateMessage();
     }