Compatibility issue with GoProne mod - 1.18.2

[ItJustFox]

Hi,

I’ve run into a conflict between CraterLib and the GoProne mod on Minecraft 1.18.2 (Forge 40.3.11).

When both CraterLib and GoProne are installed with a few other mods that never caused that specific issue, the server logs the following error whenever a player die's:

java.lang.NullPointerException: PlayerProneData capability not attached!
    at alpvax.mc.goprone.network.SetPronePacket.lambda$handle$0(SetPronePacket.java:30) 
    at net.minecraftforge.common.util.LazyOptional.orElseThrow(LazyOptional.java:281)

• Removing CraterLib fixes the issue immediately (GoProne works fine).

• With CraterLib present, it seems GoProne’s PlayerProneData capability is never attached to the player.

This only happens when both mods are loaded together.

Setup:

Minecraft: 1.18.2

Forge: 40.3.11

GoProne: 2.2.1

CraterLib: 2.1.5

Could you check if CraterLib is interfering with capability attachment on players?

Thanks a lot for your work on this mod!

[hypherionmc]

Can you please send me either your entire server log, or the entire error from that? That piece is not really helpful in determining what the issue is.

Looks similar to an issue we had with LuckPerms a while back (where the issue was actually on their side)

[ItJustFox]

[11:08:47] [Server thread/ERROR] [minecraft/PacketUtils]: Failed to handle packet net.minecraft.network.protocol.game.ServerboundCustomPayloadPacket@5e2c7ebc, suppressing error
java.lang.NullPointerException: PlayerProneData capability not attached!
        at alpvax.mc.goprone.network.SetPronePacket.lambda$handle$0(SetPronePacket.java:30) ~[goprone-1.18.2-2.2.1.jar%23116!/:1.18.2-2.2.1] {re:classloading}
        at net.minecraftforge.common.util.LazyOptional.orElseThrow(LazyOptional.java:281) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:mixin,re:classloading}
        at alpvax.mc.goprone.network.SetPronePacket.lambda$handle$1(SetPronePacket.java:30) ~[goprone-1.18.2-2.2.1.jar%23116!/:1.18.2-2.2.1] {re:classloading}
        at net.minecraftforge.network.NetworkEvent$Context.enqueueWork(NetworkEvent.java:213) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading}
        at alpvax.mc.goprone.network.SetPronePacket.handle(SetPronePacket.java:26) ~[goprone-1.18.2-2.2.1.jar%23116!/:1.18.2-2.2.1] {re:classloading}
        at net.minecraftforge.network.simple.IndexedMessageCodec.lambda$tryDecode$3(IndexedMessageCodec.java:115) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading}
        at java.util.Optional.ifPresent(Optional.java:178) ~[?:?] {re:mixin}
        at net.minecraftforge.network.simple.IndexedMessageCodec.tryDecode(IndexedMessageCodec.java:115) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading}
        at net.minecraftforge.network.simple.IndexedMessageCodec.consume(IndexedMessageCodec.java:153) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading}
        at net.minecraftforge.network.simple.SimpleChannel.networkEventListener(SimpleChannel.java:72) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:mixin,re:classloading}
        at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247) ~[eventbus-5.0.3.jar%232!/:?] {}
        at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239) ~[eventbus-5.0.3.jar%232!/:?] {}
        at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-5.0.3.jar%232!/:?] {}
        at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-5.0.3.jar%232!/:?] {}
        at net.minecraftforge.network.NetworkInstance.dispatch(NetworkInstance.java:68) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading}
        at net.minecraftforge.network.NetworkHooks.lambda$onCustomPayload$1(NetworkHooks.java:83) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading,re:mixin}
        at java.util.Optional.map(Optional.java:260) ~[?:?] {re:mixin}
        at net.minecraftforge.network.NetworkHooks.onCustomPayload(NetworkHooks.java:83) ~[forge-1.18.2-40.3.11-universal.jar%23197!/:?] {re:classloading,re:mixin}
        at net.minecraft.server.network.ServerGamePacketListenerImpl.m_7423_(ServerGamePacketListenerImpl.java:1440) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
        at net.minecraft.network.protocol.game.ServerboundCustomPayloadPacket.m_5797_(ServerboundCustomPayloadPacket.java:35) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:classloading,re:mixin}
        at net.minecraft.network.protocol.game.ServerboundCustomPayloadPacket.m_5797_(ServerboundCustomPayloadPacket.java:8) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:classloading,re:mixin}
        at net.minecraft.network.protocol.PacketUtils.m_131356_(PacketUtils.java:22) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:classloading}
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:classloading,re:mixin}
        at net.minecraft.util.thread.BlockableEventLoop.m_6367_(BlockableEventLoop.java:157) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.m_6367_(ReentrantBlockableEventLoop.java:23) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,re:computing_frames,re:classloading}
        at net.minecraft.server.MinecraftServer.m_6367_(MinecraftServer.java:799) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_6367_(MinecraftServer.java:164) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at net.minecraft.util.thread.BlockableEventLoop.m_7245_(BlockableEventLoop.java:131) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.m_129961_(MinecraftServer.java:782) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_7245_(MinecraftServer.java:776) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at net.minecraft.util.thread.BlockableEventLoop.m_18701_(BlockableEventLoop.java:140) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.m_130012_(MinecraftServer.java:762) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:689) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:261) ~[server-1.18.2-20220404.173914-srg.jar%23192!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:A}
        at java.lang.Thread.run(Thread.java:1583) [?:?] {re:mixin}

Here one of the entire issue, aside of that there are no errors

[NighthowlerStudios]

You said "alongside a few other mods", can we know those please? This sounds like an mixin chain issue

[hypherionmc]

The fack? It's not even mentioning craterlib anywhere in that, so I'm very curious as to why that's the case.

Hmmmm. Will have to run my own tests on this to see

[ItJustFox]

• AI-Improvements
• Carry On
• CasinoCraft
• Chipped
• Controlling
• CookingForBlockheads
• CoroUtil
• CosmeticArmorReworked
• Create
• Create Big Cannons
• Create Confectionery
• Create Crafts & Additions
• Create Deco
• Create Enchantment Industry
• Create Railways Navigator
• Create Slice & Dice
• Create Stuff & Additions
• Create: Central Kitchen
• Create: Connected
• Create: Copycats+
• Create: Design n' Decor
• Create: Steam 'n Rails
• Create: Vintage Improvements
• FirstPerson
• GoProne
• Macaw's Bridges
• Macaw's Doors
• Macaw's Fences and Walls
• Macaw's Furniture
• Macaw's Lights and Lamps
• Macaw's Roofs
• Macaw's Trapdoors
• Macaw's Windows
• PlayerRevive
• Simple Voice Chat
• What Are They Up To
• kotlinforforge-3.12.0-all

And Server Side

• Vanish
• ChunkPregenerator
• And also
• MaintenanceMode -- Disable
• SimpleDiscordLink -- Disable
• CraterLib -- Disable WHEN THIS MOD is enabled, it's where everything break if a player die, spamming the console with the error above and locking the player into a "Loading Terrain".

[NighthowlerStudios]

it's gonna end up a mixin conflict with the playerdata classes again. we had a similar situation before with LuckPerms

[hypherionmc]

Hey.

Finally got time to test this out. I cannot replicate this error at all, even with all the mods you listed installed. I tested dying about 12 times, and each time my player respawned just fine 🫤