Checked objects possible to cause null pointer exceptions. Added some logging.

Mage.Common/src/mage/view/SeatView.java

@@ -30,6 +30,7 @@ package mage.view;
 import java.io.Serializable;
 import java.util.UUID;
 import mage.game.Seat;
+import mage.players.net.UserData;
 
 /**
  *
@@ -48,7 +49,11 @@ public class SeatView implements Serializable {
         if (seat.getPlayer() != null) {
             this.playerId = seat.getPlayer().getId();
             this.playerName = seat.getPlayer().getName();
+            if (seat.getPlayer().getUserData() == null) {
+                this.flagName = UserData.getDefaultFlagName();
+            } else {
                 this.flagName = seat.getPlayer().getUserData().getFlagName();
+            }
         } else {
             // Empty seat
             this.playerName = "";

Mage.Server/src/main/java/mage/server/game/GamesRoomImpl.java

@@ -228,15 +228,17 @@ class TableListSorter implements Comparator<Table> {
 
     @Override
     public int compare(Table one, Table two) {
-        if (!one.getState().equals(TableState.SIDEBOARDING) && !one.getState().equals(TableState.DUELING)) {
+        if (one.getState() != null && two.getState() != null) {
+            if (!TableState.SIDEBOARDING.equals(one.getState()) && !TableState.DUELING.equals(one.getState())) {
                 if (one.getState().compareTo(two.getState()) != 0) {
                     return one.getState().compareTo(two.getState());
                 }
-        } else if (!two.getState().equals(TableState.SIDEBOARDING) && !two.getState().equals(TableState.DUELING)) {
+            } else if (!TableState.SIDEBOARDING.equals(two.getState()) && !TableState.DUELING.equals(two.getState())) {
                 if (one.getState().compareTo(two.getState()) != 0) {
                     return one.getState().compareTo(two.getState());
                 }
             }
+        }
         if (two.getEndTime() != null) {
             if (one.getEndTime() == null) {
                 return 1;

Mage.Sets/src/mage/sets/battleforzendikar/BringToLight.java

@@ -45,6 +45,7 @@ import mage.filter.predicate.mageobject.ConvertedManaCostPredicate;
 import mage.game.Game;
 import mage.players.Player;
 import mage.target.common.TargetCardInLibrary;
+import org.apache.log4j.Logger;
 
 /**
  *
@@ -77,7 +78,7 @@ class BringToLightEffect extends OneShotEffect {
     public BringToLightEffect() {
         super(Outcome.PlayForFree);
         this.staticText = "<i>Converge</i> &mdash; Search your library for a creature, instant, or sorcery card with converted mana "
-                + "cost less than or equal to the number of colors of mana spent to cast Bring to Light, exile that card, "
+                + "cost less than or equal to the number of colors of mana spent to cast {this}, exile that card, "
                 + "then shuffle your library. You may cast that card without paying its mana cost";
     }
 
@@ -102,12 +103,16 @@ class BringToLightEffect extends OneShotEffect {
             controller.searchLibrary(target, game);
             Card card = controller.getLibrary().getCard(target.getFirstTarget(), game);
             if (card != null) {
-                controller.moveCards(card, null, Zone.EXILED, source, game);
+                controller.moveCards(card, Zone.EXILED, source, game);
             }
             controller.shuffleLibrary(game);
             if (card != null) {
                 if (controller.chooseUse(outcome, "Cast " + card.getName() + " without paying its mana cost?", source, game)) {
+                    if (card.getSpellAbility() != null) {
                         controller.cast(card.getSpellAbility(), game, true);
+                    } else {
+                        Logger.getLogger(BringToLightEffect.class).error("Bring to Light: spellAbility == null " + card.getName());
+                    }
                 }
             }
             return true;

Mage.Sets/src/mage/sets/lorwyn/RingsOfBrighthearth.java

@@ -94,7 +94,7 @@ class RingsOfBrighthearthTriggeredAbility extends TriggeredAbilityImpl {
     public boolean checkTrigger(GameEvent event, Game game) {
         if (event.getPlayerId().equals(getControllerId())) {
             StackAbility stackAbility = (StackAbility) game.getStack().getStackObject(event.getSourceId());
-            if (!(stackAbility.getStackAbility() instanceof ManaAbility)) {
+            if (stackAbility != null && !(stackAbility.getStackAbility() instanceof ManaAbility)) {
                 Effect effect = this.getEffects().get(0);
                 effect.setValue("stackAbility", stackAbility.getStackAbility());
                 return true;

Mage.Sets/src/mage/sets/mirrodin/IsochronScepter.java

@@ -28,11 +28,6 @@
 package mage.sets.mirrodin;
 
 import java.util.UUID;
-
-import mage.constants.CardType;
-import mage.constants.Outcome;
-import mage.constants.Rarity;
-import mage.constants.Zone;
 import mage.abilities.Ability;
 import mage.abilities.common.EntersBattlefieldTriggeredAbility;
 import mage.abilities.common.SimpleActivatedAbility;
@@ -41,6 +36,10 @@ import mage.abilities.costs.mana.GenericManaCost;
 import mage.abilities.effects.OneShotEffect;
 import mage.cards.Card;
 import mage.cards.CardImpl;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.Rarity;
+import mage.constants.Zone;
 import mage.filter.Filter;
 import mage.filter.FilterCard;
 import mage.filter.predicate.mageobject.CardTypePredicate;
@@ -50,6 +49,7 @@ import mage.game.permanent.Permanent;
 import mage.players.Player;
 import mage.target.TargetCard;
 import mage.util.CardUtil;
+import org.apache.log4j.Logger;
 
 /**
  *
@@ -84,6 +84,7 @@ public class IsochronScepter extends CardImpl {
 class IsochronScepterImprintEffect extends OneShotEffect {
 
     private static final FilterCard filter = new FilterCard("instant card with converted mana cost 2 or less from your hand");
+
     static {
         filter.add(new CardTypePredicate(CardType.INSTANT));
         filter.add(new ConvertedManaCostPredicate(Filter.ComparisonType.LessThan, 3));
@@ -109,7 +110,7 @@ class IsochronScepterImprintEffect extends OneShotEffect {
                         && controller.choose(Outcome.Benefit, controller.getHand(), target, game)) {
                     Card card = controller.getHand().get(target.getFirstTarget(), game);
                     if (card != null) {
-                        controller.moveCardToExileWithInfo(card, source.getSourceId(), sourcePermanent.getIdName() +" (Imprint)", source.getSourceId(), game, Zone.HAND, true);
+                        controller.moveCardToExileWithInfo(card, source.getSourceId(), sourcePermanent.getIdName() + " (Imprint)", source.getSourceId(), game, Zone.HAND, true);
                         Permanent permanent = game.getPermanent(source.getSourceId());
                         if (permanent != null) {
                             permanent.imprint(card.getId(), game);
@@ -158,10 +159,14 @@ class IsochronScepterCopyEffect extends OneShotEffect {
                     if (controller.chooseUse(outcome, new StringBuilder("Create a copy of ").append(imprintedInstant.getName()).append("?").toString(), source, game)) {
                         Card copiedCard = game.copyCard(imprintedInstant, source, source.getControllerId());
                         if (copiedCard != null) {
-                            game.getExile().add(source.getSourceId(), "",copiedCard);
+                            game.getExile().add(source.getSourceId(), "", copiedCard);
                             game.getState().setZone(copiedCard.getId(), Zone.EXILED);
                             if (controller.chooseUse(outcome, "Cast the copied card without paying mana cost?", source, game)) {
+                                if (copiedCard.getSpellAbility() != null) {
                                     controller.cast(copiedCard.getSpellAbility(), game, true);
+                                } else {
+                                    Logger.getLogger(IsochronScepterCopyEffect.class).error("Isochron Scepter: spell ability == null " + copiedCard.getName());
+                                }
                             }
                         }
                     }

Mage.Sets/src/mage/sets/scarsofmirrodin/QuicksilverGargantuan.java

@@ -25,27 +25,25 @@
  *  authors and should not be interpreted as representing official policies, either expressed
  *  or implied, of BetaSteward_at_googlemail.com.
  */
-
 package mage.sets.scarsofmirrodin;
 
-import mage.constants.CardType;
+import java.util.UUID;
-import mage.constants.Rarity;
 import mage.MageInt;
 import mage.abilities.Ability;
 import mage.abilities.common.EntersBattlefieldAbility;
 import mage.abilities.effects.ContinuousEffectImpl;
 import mage.cards.Card;
 import mage.cards.CardImpl;
+import mage.constants.CardType;
 import mage.constants.Duration;
 import mage.constants.Layer;
 import mage.constants.Outcome;
+import mage.constants.Rarity;
 import mage.constants.SubLayer;
 import mage.game.Game;
 import mage.game.permanent.Permanent;
-import mage.target.common.TargetCreaturePermanent;
-
-import java.util.UUID;
 import mage.target.Target;
+import mage.target.common.TargetCreaturePermanent;
 
 /**
  * @author ayratn
@@ -91,7 +89,11 @@ public class QuicksilverGargantuan extends CardImpl {
         @Override
         public boolean apply(Game game, Ability source) {
             Card card = game.getCard(source.getFirstTarget());
-            Permanent permanent = game.getPermanent(source.getSourceId());
+            Permanent permanent = game.getPermanentEntering(source.getSourceId());
+            if (permanent == null) {
+                permanent = game.getPermanent(source.getSourceId());
+            }
+            if (permanent != null) {
                 permanent.setName(card.getName());
                 permanent.getColor(game).setColor(card.getColor(game));
                 permanent.getManaCost().clear();
@@ -113,9 +115,10 @@ public class QuicksilverGargantuan extends CardImpl {
                 for (Ability ability : card.getAbilities()) {
                     permanent.addAbility(ability, game);
                 }
-
                 return true;
             }
+            return false;
+        }
 
         @Override
         public QuicksilverGargantuanCopyEffect copy() {

Mage.Sets/src/mage/sets/tenthedition/DoublingCube.java

@@ -36,7 +36,6 @@ import mage.abilities.effects.common.ManaEffect;
 import mage.abilities.mana.SimpleManaAbility;
 import mage.cards.CardImpl;
 import mage.constants.CardType;
-import mage.constants.Outcome;
 import mage.constants.Rarity;
 import mage.constants.Zone;
 import mage.game.Game;
@@ -83,11 +82,11 @@ class DoublingCubeEffect extends ManaEffect {
 
     @Override
     public boolean apply(Game game, Ability source) {
-        Player you = game.getPlayer(source.getControllerId());
+        Player controller = game.getPlayer(source.getControllerId());
-        if (you == null) {
+        if (controller == null) {
             return false;
         }
-        ManaPool pool = you.getManaPool();
+        ManaPool pool = controller.getManaPool();
         int blackMana = pool.getBlack();
         int whiteMana = pool.getWhite();
         int blueMana = pool.getBlue();
@@ -105,10 +104,9 @@ class DoublingCubeEffect extends ManaEffect {
         return null;
     }
 
-
     @Override
     public DoublingCubeEffect copy() {
         return new DoublingCubeEffect(this);
     }
 
- }
+}

Mage/src/mage/Mana.java

@@ -259,7 +259,7 @@ public class Mana implements Comparable<Mana>, Serializable, Copyable<Mana> {
 
     @Override
     public String toString() {
-        StringBuilder sbMana = threadLocalBuilder.get();
+        StringBuilder sbMana = new StringBuilder();
         if (colorless > 0) {
             sbMana.append("{").append(Integer.toString(colorless)).append("}");
         }

Mage/src/mage/abilities/common/AnotherCreatureEntersBattlefieldTriggeredAbility.java

@@ -30,8 +30,11 @@ public class AnotherCreatureEntersBattlefieldTriggeredAbility extends TriggeredA
     @Override
     public boolean checkTrigger(GameEvent event, Game game) {
         if (event.getTargetId() != this.getSourceId()) {
-            Permanent permanent = game.getPermanent(event.getTargetId());
+            Permanent permanent = game.getPermanentEntering(event.getTargetId());
-            if (permanent.getCardType().contains(CardType.CREATURE)) {
+            if (permanent == null) {
+                permanent = game.getPermanent(event.getTargetId());
+            }
+            if (permanent != null && permanent.getCardType().contains(CardType.CREATURE)) {
                 return true;
             }
         }

Mage/src/mage/filter/predicate/mageobject/ColorPredicate.java

@@ -46,7 +46,7 @@ public class ColorPredicate implements Predicate<MageObject> {
 
     @Override
     public boolean apply(MageObject input, Game game) {
-        return input.getColor(game).contains(color);
+        return color != null && input.getColor(game).contains(color);
     }
 
     @Override

Mage/src/mage/game/GameCommanderImpl.java

@@ -129,7 +129,9 @@ public abstract class GameCommanderImpl extends GameImpl {
                     if (!mulliganedCards.containsKey(playerId)) {
                         mulliganedCards.put(playerId, new CardsImpl());
                     }
-                    card.moveToExile(null, "", null, this);
+                    player.getHand().remove(card);
+                    getExile().add(card);
+                    getState().setZone(card.getId(), Zone.EXILED);
                     card.setFaceDown(true, this);
                     mulliganedCards.get(playerId).add(card);
                 }
@@ -168,7 +170,9 @@ public abstract class GameCommanderImpl extends GameImpl {
         if (player != null && mulliganedCards.containsKey(playerId)) {
             for (Card card : mulliganedCards.get(playerId).getCards(this)) {
                 if (card != null) {
-                    card.moveToZone(Zone.LIBRARY, null, this, false);
+                    getExile().removeCard(card, this);
+                    player.getLibrary().putOnTop(card, this);
+                    getState().setZone(card.getId(), Zone.LIBRARY);
                     card.setFaceDown(false, this);
                 }
             }

Mage/src/mage/players/net/UserData.java

@@ -59,7 +59,7 @@ public class UserData implements Serializable {
     }
 
     public static UserData getDefaultUserDataView() {
-        return new UserData(UserGroup.DEFAULT, 0, false, false, true, null, "world.png", false, true, true, false, false, false);
+        return new UserData(UserGroup.DEFAULT, 0, false, false, true, null, getDefaultFlagName(), false, true, true, false, false, false);
     }
 
     public void setGroupId(int groupId) {
@@ -166,4 +166,7 @@ public class UserData implements Serializable {
         this.autoOrderTrigger = autoOrderTrigger;
     }
 
+    public static String getDefaultFlagName() {
+        return "world.png";
+    }
 }