[All Build 41 (41.77.9 Still Present)][MP Dedicated] Client booted to menu due to NullPointerException when getting position of a zombie.

[UdderlyEvelyn]

ERROR: General     , 1663945464480> 6,878,750,020> ExceptionLogger.logException> Exception thrown java.lang.NullPointerException: Cannot invoke "zombie.iso.IsoGridSquare.getX()" because "this.square" is null at IsoObject.getX line:3023.
ERROR: General     , 1663945464480> 6,878,750,020> DebugLogStream.printException> Stack trace:
java.lang.NullPointerException: Cannot invoke "zombie.iso.IsoGridSquare.getX()" because "this.square" is null
	at zombie.iso.IsoObject.getX(IsoObject.java:3023)
	at zombie.characters.IsoZombie.lambda$registerVariableCallbacks$12(IsoZombie.java:565)
	at zombie.core.skinnedmodel.advancedanimation.AnimationVariableSlotCallback.getValue(AnimationVariableSlotCallback.java:34)
	at zombie.core.skinnedmodel.advancedanimation.AnimationVariableSlotCallbackBool.getValueString(AnimationVariableSlotCallbackBool.java:49)
	at zombie.core.skinnedmodel.advancedanimation.AnimationVariableSource.getVariableString(AnimationVariableSource.java:292)
	at zombie.characters.IsoGameCharacter.getVariableString(IsoGameCharacter.java:13614)
	at zombie.characters.action.conditions.CharacterVariableCondition.resolveValue(CharacterVariableCondition.java:247)
	at zombie.characters.action.conditions.CharacterVariableCondition.passes(CharacterVariableCondition.java:279)
	at zombie.characters.action.ActionTransition.passes(ActionTransition.java:138)
	at zombie.characters.action.ActionContext.evaluateCurrentStateTransitions(ActionContext.java:157)
	at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
	at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
	at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
	at zombie.util.Lambda.capture(Lambda.java:130)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
	at zombie.characters.action.ActionContext.updateInternal(ActionContext.java:78)
	at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
	at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
	at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
	at zombie.util.Lambda.capture(Lambda.java:130)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
	at zombie.characters.action.ActionContext.update(ActionContext.java:66)
	at zombie.characters.IsoGameCharacter.postUpdateInternal(IsoGameCharacter.java:12046)
	at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
	at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
	at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
	at zombie.util.Lambda.capture(Lambda.java:130)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
	at zombie.characters.IsoGameCharacter.postupdate(IsoGameCharacter.java:12025)
	at zombie.characters.IsoZombie.postUpdateInternal(IsoZombie.java:2103)
	at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
	at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
	at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
	at zombie.util.Lambda.capture(Lambda.java:130)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
	at zombie.characters.IsoZombie.postupdate(IsoZombie.java:2095)
	at zombie.MovingObjectUpdateSchedulerUpdateBucket.postupdate(MovingObjectUpdateSchedulerUpdateBucket.java:97)
	at zombie.MovingObjectUpdateScheduler.postupdate(MovingObjectUpdateScheduler.java:185)
	at zombie.CollisionManager.resolveContactsInternal(CollisionManager.java:411)
	at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
	at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
	at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
	at zombie.util.Lambda.capture(Lambda.java:130)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
	at zombie.CollisionManager.ResolveContacts(CollisionManager.java:236)
	at zombie.iso.IsoWorld.updateInternal(IsoWorld.java:3482)
	at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
	at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
	at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
	at zombie.util.Lambda.capture(Lambda.java:130)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
	at zombie.iso.IsoWorld.update(IsoWorld.java:3407)
	at zombie.gameStates.IngameState.updateInternal(IngameState.java:1657)
	at zombie.gameStates.IngameState.update(IngameState.java:1373)
	at zombie.gameStates.GameStateMachine.update(GameStateMachine.java:101)
	at zombie.GameWindow.logic(GameWindow.java:297)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.GameWindow.frameStep(GameWindow.java:764)
	at zombie.GameWindow.run_ez(GameWindow.java:680)
	at zombie.GameWindow.mainThread(GameWindow.java:494)
	at java.base/java.lang.Thread.run(Unknown Source)

This doesn't happen with any consistency, only at random, but it seems once in a while there's somehow no square for the IsoZombie. I've experienced this on all versions from 41.71 and up - not sure if it ever happened prior but I don't recall it.

Edited October 23, 2022 by UdderlyEvelyn

[Shakesbeere]

This happened before aswell. I don't exactly remember which version, but at least since the start of b41.

Hard to give any specifics on this because it does happen somewhat randomly but loading in larger groups of zombies while driving seems to make especially the passenger susceptible. Crashes on foot or driving your own car are much less frequent in my experience.

[EnigmaGrey]

Are any mods enabled?

[UdderlyEvelyn]

This still occurs as of 41.77.4, and yes mods are enabled. The error occurs in vanilla code on the java side, though, so I'm not sure how it could be mod-related - what kind of mod could make the square a zombie is at null?

 

There's reports of this error online as far back as December 2021.. In order to avoid clients being booted to the menu it would be helpful if a check for whether a square is null were in place.

 

Edit: Is this item in the changelog referencing this bug?

- Fixed NullPointerException in bThump animation variable when the object isn't loaded.

Edited October 13, 2022 by UdderlyEvelyn

[UdderlyEvelyn]

Still occurs in 41.77.9, I and others have had it 4-5 times tonight, I suspect it is something that is sync'd rather than just a clientside issue.

Edited October 23, 2022 by UdderlyEvelyn