v0.9.2: added various safety checks to reduce the chance of crashes

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/GameScene.java

@@ -532,24 +532,10 @@ public class GameScene extends PixelScene {
 	public void destroy() {
 		
 		//tell the actor thread to finish, then wait for it to complete any actions it may be doing.
-		if (actorThread != null && actorThread.isAlive()){
-			synchronized (GameScene.class){
-				synchronized (actorThread) {
-					actorThread.interrupt();
-				}
-				try {
-					GameScene.class.wait(5000);
-				} catch (InterruptedException e) {
-					ShatteredPixelDungeon.reportException(e);
-				}
-				synchronized (actorThread) {
-					if (Actor.processing()) {
-						Throwable t = new Throwable();
-						t.setStackTrace(actorThread.getStackTrace());
-						throw new RuntimeException("timeout waiting for actor thread! ", t);
-					}
-				}
-			}
+		if (!waitForActorThread( 4500 )){
+			Throwable t = new Throwable();
+			t.setStackTrace(actorThread.getStackTrace());
+			throw new RuntimeException("timeout waiting for actor thread! ", t);
 		}
 
 		Emitter.freezeEmitters = false;
@@ -567,10 +553,28 @@ public class GameScene extends PixelScene {
 			actorThread.interrupt();
 		}
 	}
+
+	public synchronized boolean waitForActorThread(int msToWait ){
+		if (actorThread != null && actorThread.isAlive()){
+			return true;
+		}
+		synchronized (actorThread) {
+			actorThread.interrupt();
+		}
+		try {
+			GameScene.class.wait(msToWait);
+		} catch (InterruptedException e) {
+			ShatteredPixelDungeon.reportException(e);
+		}
+		synchronized (actorThread) {
+			return Actor.processing();
+		}
+	}
 	
 	@Override
 	public synchronized void onPause() {
 		try {
+			waitForActorThread(500);
 			Dungeon.saveAll();
 			Badges.saveGlobal();
 			Journal.saveGlobal();

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

@@ -50,13 +50,15 @@ public class AttackIndicator extends Tag {
 	
 	public AttackIndicator() {
 		super( DangerIndicator.COLOR );
-		
-		instance = this;
-		lastTarget = null;
-		
-		setSize( 24, 24 );
-		visible( false );
-		enable( false );
+
+		synchronized (this) {
+			instance = this;
+			lastTarget = null;
+
+			setSize(24, 24);
+			visible(false);
+			enable(false);
+		}
 	}
 	
 	@Override