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a problem with getLastDamageSource() method


BlueKnight009
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hi

this is my code im having an issue with pig.getLastDamageSource().getTrueSource() this method causes minecraft to crash on me when either i (the player) kill a pig and sometimes when the creeper explode i tried fixing the issue for 40 minutes and couldnt really fix it

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@SubscribeEvent
public static void ExplodedPigs(EntityLeaveWorldEvent event) {
    if (!(event.getEntity() instanceof PigEntity))
           return;
    
    PigEntity pig = (PigEntity) event.getEntity();

    if(pig.getLastDamageSource().getTrueSource() instanceof CreeperEntity)
    pig.entityDropItem(Items.DIAMOND);
}

 

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12 hours ago, poopoodice said:

This can be null.

Post the crash log please.

Spoiler

java.lang.NullPointerException: Unexpected error
    at com.example.examplemod.common.events.MobEvents.ExplodedPigs(MobEvents.java:39) ~[main/:?] {re:classloading}
    at net.minecraftforge.eventbus.ASMEventHandler_0_MobEvents_ExplodedPigs_EntityLeaveWorldEvent.invoke(.dynamic) ~[?:?] {}
    at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-3.0.5-service.jar:?] {}
    at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297) ~[eventbus-3.0.5-service.jar:?] {}
    at net.minecraft.client.world.ClientWorld.removeEntity(ClientWorld.java:321) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.world.ClientWorld.tickEntities(ClientWorld.java:174) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1530) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:979) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.run(Minecraft.java:612) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_301] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_301] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_301] {}
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_301] {}
    at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}
    at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.4-35.1.4_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}

here is the log

 

 

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oh wow thanks for this life changing advice man , listen i don't know whats your problem bro but if you don't want to help or at least guide with clear instructions then don't waste your time trash talking , wtf is Learn basic java even mean??? if you don't have something meaningful to say just don't reply at all this will be better than mocking beginners just because you know how to code :D

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image.thumb.png.1ce7c65deb2f7603186484d2226d2248.png

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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