v2.2.0: added various safety checks to prevent rare crash errors

SPD-classes/src/main/java/com/watabou/noosa/Group.java

@@ -280,6 +280,7 @@ public class Group extends Gizmo {
 	}
 	
 	public synchronized void clear() {
+		if (length == 0) return;
 		for (int i=0; i < length; i++) {
 			Gizmo g = members.get( i );
 			if (g != null) {

SPD-classes/src/main/java/com/watabou/noosa/audio/Sample.java

@@ -79,10 +79,14 @@ public enum Sample {
 			@Override
 			public void run() {
 				for (String asset : toLoad) {
+					try {
 						Sound newSound = Gdx.audio.newSound(Gdx.files.internal(asset));
 						synchronized (INSTANCE) {
 							ids.put(asset, newSound);
 						}
+					} catch (Exception e){
+						Game.reportException(e);
+					}
 				}
 			}
 		}.start();

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/Char.java

@@ -448,8 +448,10 @@ public abstract class Char extends Actor {
 					enemy.damage(-1, this);
 					DeathMark.processFearTheReaper(enemy);
 				}
+				if (enemy.sprite != null) {
 					enemy.sprite.showStatus(CharSprite.NEGATIVE, Messages.get(Preparation.class, "assassinated"));
 				}
+			}
 
 			Talent.CombinedLethalityTriggerTracker combinedLethality = buff(Talent.CombinedLethalityTriggerTracker.class);
 			if (combinedLethality != null){
@@ -464,13 +466,17 @@ public abstract class Char extends Actor {
 						enemy.damage(-1, this);
 						DeathMark.processFearTheReaper(enemy);
 					}
+					if (enemy.sprite != null) {
 						enemy.sprite.showStatus(CharSprite.NEGATIVE, Messages.get(Talent.CombinedLethalityTriggerTracker.class, "executed"));
 					}
+				}
 				combinedLethality.detach();
 			}
 
+			if (enemy.sprite != null) {
 				enemy.sprite.bloodBurstA(sprite.center(), effectiveDamage);
 				enemy.sprite.flash();
+			}
 
 			if (!enemy.isAlive() && visibleFight) {
 				if (enemy == Dungeon.hero) {

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/sprites/NecromancerSprite.java

@@ -104,6 +104,7 @@ public class NecromancerSprite extends MobSprite {
 	}
 
 	public void finishSummoning(){
+		if (summoningBones != null) {
 			if (summoningBones.visible) {
 				Sample.INSTANCE.play(Assets.Sounds.BONES);
 				summoningBones.burst(Speck.factory(Speck.RATTLE), 5);
@@ -111,6 +112,7 @@ public class NecromancerSprite extends MobSprite {
 				summoningBones.on = false;
 			}
 			summoningBones = null;
+		}
 		idle();
 	}
 

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ui/Toolbar.java

@@ -120,7 +120,7 @@ public class Toolbar extends Component {
 					return;
 				}
 
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null && Dungeon.hero.ready && !GameScene.cancel()) {
 
 					String[] slotNames = new String[6];
 					Image[] slotIcons = new Image[6];
@@ -199,7 +199,7 @@ public class Toolbar extends Component {
 		add(btnWait = new Tool(24, 0, 20, 26) {
 			@Override
 			protected void onClick() {
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null &&  Dungeon.hero.ready && !GameScene.cancel()) {
 					examining = false;
 					Dungeon.hero.rest(false);
 				}
@@ -221,7 +221,7 @@ public class Toolbar extends Component {
 			}
 
 			protected boolean onLongClick() {
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null && Dungeon.hero.ready && !GameScene.cancel()) {
 					examining = false;
 					Dungeon.hero.rest(true);
 				}
@@ -234,7 +234,7 @@ public class Toolbar extends Component {
 		add(new Button(){
 			@Override
 			protected void onClick() {
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null && Dungeon.hero.ready && !GameScene.cancel()) {
 					examining = false;
 					Dungeon.hero.rest(true);
 				}
@@ -251,7 +251,7 @@ public class Toolbar extends Component {
 		add(new Button(){
 			@Override
 			protected void onClick() {
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null && Dungeon.hero.ready && !GameScene.cancel()) {
 					Dungeon.hero.waitOrPickup = true;
 					if ((Dungeon.level.heaps.get(Dungeon.hero.pos) != null || Dungeon.hero.canSelfTrample())
 						&& Dungeon.hero.handle(Dungeon.hero.pos)){
@@ -271,7 +271,7 @@ public class Toolbar extends Component {
 			}
 
 			protected boolean onLongClick() {
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null && Dungeon.hero.ready && !GameScene.cancel()) {
 					examining = false;
 					Dungeon.hero.rest(true);
 				}
@@ -288,7 +288,7 @@ public class Toolbar extends Component {
 		add(btnSearch = new Tool(44, 0, 20, 26) {
 			@Override
 			protected void onClick() {
-				if (Dungeon.hero.ready) {
+				if (Dungeon.hero != null && Dungeon.hero.ready) {
 					if (!examining && !GameScene.cancel()) {
 						GameScene.selectCell(informer);
 						examining = true;
@@ -324,7 +324,7 @@ public class Toolbar extends Component {
 
 			@Override
 			protected void onClick() {
-				if (Dungeon.hero.ready || !Dungeon.hero.isAlive()) {
+				if (Dungeon.hero != null && (Dungeon.hero.ready || !Dungeon.hero.isAlive())) {
 					if (SPDSettings.interfaceSize() == 2) {
 						GameScene.toggleInvPane();
 					} else {
@@ -394,7 +394,7 @@ public class Toolbar extends Component {
 		add(new Button(){
 			@Override
 			protected void onClick() {
-				if (Dungeon.hero.ready && !GameScene.cancel()) {
+				if (Dungeon.hero != null && Dungeon.hero.ready && !GameScene.cancel()) {
 					ArrayList<Bag> bags = Dungeon.hero.belongings.getBags();
 					String[] names = new String[bags.size()];
 					Image[] images = new Image[bags.size()];