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LT 1.20.1 crashed while importing big blueprints #1052

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iverson35 opened this issue Jan 23, 2025 · 5 comments
Closed

LT 1.20.1 crashed while importing big blueprints #1052

iverson35 opened this issue Jan 23, 2025 · 5 comments

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@iverson35
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I tried to import a blueprint that is 2.7 MB in size, but the game crashed and threw the following exception. This blueprint was created a long time ago in version 1.12.2, and importing and exporting worked perfectly fine at that time.
If you need it, I would be happy to provide you with more detailed information.

Mod list:
LittleTiles 1.6.0-pre152
CreativeCore 2.12.31

Crash-report:

// Don't be sad, have a hug! <3

Time: 2025-01-24 01:35:09
Description: Ticking entity

java.lang.IllegalArgumentException: Payload may not be larger than 1048576 bytes
	at net.minecraft.network.protocol.game.ClientboundCustomPayloadPacket.<init>(ClientboundCustomPayloadPacket.java:35) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraftforge.network.NetworkDirection.lambda$static$1(NetworkDirection.java:28) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at net.minecraftforge.network.NetworkDirection.buildPacket(NetworkDirection.java:79) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at net.minecraftforge.network.simple.SimpleChannel.toVanillaPacket(SimpleChannel.java:112) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at net.minecraftforge.network.simple.SimpleChannel.send(SimpleChannel.java:107) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at team.creative.creativecore.common.network.CreativeNetwork.sendToClient(CreativeNetwork.java:79) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.integration.ContainerIntegration.send(ContainerIntegration.java:126) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.sync.GuiSyncGlobal.send(GuiSyncGlobal.java:24) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.controls.inventory.IGuiInventory.syncAll(IGuiInventory.java:110) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.controls.inventory.GuiInventoryGrid.tick(GuiInventoryGrid.java:166) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.GuiParent.tick(GuiParent.java:438) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.GuiLayer.tick(GuiLayer.java:270) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.integration.ContainerIntegration.tick(ContainerIntegration.java:43) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.integration.ContainerIntegration.m_38946_(ContainerIntegration.java:38) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at net.minecraft.server.level.ServerPlayer.m_8119_(ServerPlayer.java:435) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.level.ServerLevel.m_8647_(ServerLevel.java:693) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.world.level.Level.m_46653_(Level.java:479) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:common.level.LevelAccessor,pl:mixin:APP:littletiles.mixins.json:common.level.LevelMixin,pl:mixin:A}
	at net.minecraft.server.level.ServerLevel.m_184063_(ServerLevel.java:343) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.world.level.entity.EntityTickList.m_156910_(EntityTickList.java:54) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:323) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:893) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:89) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at java.lang.Thread.run(Thread.java:842) ~[?:?] {re:mixin}


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Suspected Mod: 
	CreativeCore (creativecore), Version: 2.12.31
		Issue tracker URL: https://github.com/CreativeMD/CreativeCore/issues
		at TRANSFORMER/[email protected]/team.creative.creativecore.common.network.CreativeNetwork.sendToClient(CreativeNetwork.java:79)
Stacktrace:
	at net.minecraft.network.protocol.game.ClientboundCustomPayloadPacket.<init>(ClientboundCustomPayloadPacket.java:35) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraftforge.network.NetworkDirection.lambda$static$1(NetworkDirection.java:28) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at net.minecraftforge.network.NetworkDirection.buildPacket(NetworkDirection.java:79) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at net.minecraftforge.network.simple.SimpleChannel.toVanillaPacket(SimpleChannel.java:112) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at net.minecraftforge.network.simple.SimpleChannel.send(SimpleChannel.java:107) ~[forge-1.20.1-47.3.0-universal.jar%23165!/:?] {re:classloading}
	at team.creative.creativecore.common.network.CreativeNetwork.sendToClient(CreativeNetwork.java:79) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.integration.ContainerIntegration.send(ContainerIntegration.java:126) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.sync.GuiSyncGlobal.send(GuiSyncGlobal.java:24) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.controls.inventory.IGuiInventory.syncAll(IGuiInventory.java:110) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.controls.inventory.GuiInventoryGrid.tick(GuiInventoryGrid.java:166) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.GuiParent.tick(GuiParent.java:438) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.GuiLayer.tick(GuiLayer.java:270) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.integration.ContainerIntegration.tick(ContainerIntegration.java:43) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at team.creative.creativecore.common.gui.integration.ContainerIntegration.m_38946_(ContainerIntegration.java:38) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at net.minecraft.server.level.ServerPlayer.m_8119_(ServerPlayer.java:435) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.level.ServerLevel.m_8647_(ServerLevel.java:693) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.world.level.Level.m_46653_(Level.java:479) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:common.level.LevelAccessor,pl:mixin:APP:littletiles.mixins.json:common.level.LevelMixin,pl:mixin:A}
	at net.minecraft.server.level.ServerLevel.m_184063_(ServerLevel.java:343) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.world.level.entity.EntityTickList.m_156910_(EntityTickList.java:54) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:323) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
-- Entity being ticked --
Details:
	Entity Type: minecraft:player (net.minecraft.server.level.ServerPlayer)
	Entity ID: 21
	Entity Name: ignis
	Entity's Exact location: 9.50, -60.00, -0.50
	Entity's Block location: World: (9,-60,-1), Section: (at 9,4,15 in 0,-4,-1; chunk contains blocks 0,-64,-16 to 15,319,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,-64,-512 to 511,319,-1)
	Entity's Momentum: 0.00, -0.08, 0.00
	Entity's Passengers: []
	Entity's Vehicle: null
Stacktrace:
	at net.minecraft.world.level.Level.m_46653_(Level.java:479) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:common.level.LevelAccessor,pl:mixin:APP:littletiles.mixins.json:common.level.LevelMixin,pl:mixin:A}
	at net.minecraft.server.level.ServerLevel.m_184063_(ServerLevel.java:343) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.world.level.entity.EntityTickList.m_156910_(EntityTickList.java:54) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:323) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:893) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:89) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at java.lang.Thread.run(Thread.java:842) ~[?:?] {re:mixin}


-- Affected level --
Details:
	All players: 1 total; [ServerPlayer['ignis'/21, l='ServerLevel[ltdebug]', x=9.50, y=-60.00, z=-0.50]]
	Chunk stats: 8649
	Level dimension: minecraft:overworld
	Level spawn location: World: (0,-60,0), Section: (at 0,4,0 in 0,-4,0; chunk contains blocks 0,-64,0 to 15,319,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
	Level time: 1335 game time, 1335 day time
	Level name: ltdebug
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
	Level weather: Rain time: 44606 (now: false), thunder time: 176789 (now: false)
	Known server brands: forge
	Removed feature flags: 
	Level was modded: true
	Level storage version: 0x04ABD - Anvil
Stacktrace:
	at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:893) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:89) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
	at java.lang.Thread.run(Thread.java:842) ~[?:?] {re:mixin}


-- System Details --
Details:
	Minecraft Version: 1.20.1
	Minecraft Version ID: 1.20.1
	Operating System: Windows 11 (amd64) version 10.0
	Java Version: 17.0.10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing), Oracle Corporation
	Memory: 458607024 bytes (437 MiB) / 1780482048 bytes (1698 MiB) up to 3758096384 bytes (3584 MiB)
	CPUs: 32
	Processor Vendor: GenuineIntel
	Processor Name: 13th Gen Intel(R) Core(TM) i9-13980HX
	Identifier: Intel64 Family 6 Model 183 Stepping 1
	Microarchitecture: unknown
	Frequency (GHz): 2.42
	Number of physical packages: 1
	Number of physical CPUs: 24
	Number of logical CPUs: 32
	Graphics card #0 name: NVIDIA GeForce RTX 4070 Laptop GPU
	Graphics card #0 vendor: NVIDIA (0x10de)
	Graphics card #0 VRAM (MB): 4095.00
	Graphics card #0 deviceId: 0x2860
	Graphics card #0 versionInfo: DriverVersion=32.0.15.6607
	Graphics card #1 name: Intel(R) UHD Graphics
	Graphics card #1 vendor: Intel Corporation (0x8086)
	Graphics card #1 VRAM (MB): 128.00
	Graphics card #1 deviceId: 0xa788
	Graphics card #1 versionInfo: DriverVersion=31.0.101.5186
	Memory slot #0 capacity (MB): 16384.00
	Memory slot #0 clockSpeed (GHz): 5.60
	Memory slot #0 type: Unknown
	Virtual memory max (MB): 43650.46
	Virtual memory used (MB): 29407.52
	Swap memory total (MB): 27648.00
	Swap memory used (MB): 2173.59
	JVM Flags: 6 total; -XX:+UseG1GC -XX:-UseAdaptiveSizePolicy -XX:-OmitStackTraceInFastThrow -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmn537m -Xmx3584m
	Server Running: true
	Player Count: 1 / 8; [ServerPlayer['ignis'/21, l='ServerLevel[ltdebug]', x=9.50, y=-60.00, z=-0.50]]
	Data Packs: vanilla, mod:mixinextras (incompatible), mod:forge, mod:littletiles, mod:creativecore
	Enabled Feature Flags: minecraft:vanilla
	World Generation: Stable
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'forge'; Server brand changed to 'forge'
	Launched Version: LTDebug
	ModLauncher: 10.0.9+10.0.9+main.dcd20f30
	ModLauncher launch target: forgeclient
	ModLauncher naming: srg
	ModLauncher services: 
		mixin-0.8.5.jar mixin PLUGINSERVICE 
		eventbus-6.0.5.jar eventbus PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar slf4jfixer PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar object_holder_definalize PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar runtime_enum_extender PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar capability_token_subclass PLUGINSERVICE 
		accesstransformers-8.0.4.jar accesstransformer PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar runtimedistcleaner PLUGINSERVICE 
		modlauncher-10.0.9.jar mixin TRANSFORMATIONSERVICE 
		modlauncher-10.0.9.jar fml TRANSFORMATIONSERVICE 
	FML Language Providers: 
		[email protected]
		lowcodefml@null
		javafml@null
	Mod List: 
		client-1.20.1-20230612.114412-srg.jar             |Minecraft                     |minecraft                     |1.20.1              |DONE      |Manifest: a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f
		mixinextras-forge-0.4.1.jar                       |MixinExtras                   |mixinextras                   |0.4.1               |DONE      |Manifest: NOSIGNATURE
		forge-1.20.1-47.3.0-universal.jar                 |Forge                         |forge                         |47.3.0              |DONE      |Manifest: 84:ce:76:e8:45:35:e4:0e:63:86:df:47:59:80:0f:67:6c:c1:5f:6e:5f:4d:b3:54:47:1a:9f:7f:ed:5e:f2:90
		LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar       |LittleTiles                   |littletiles                   |1.6.0-pre152        |DONE      |Manifest: NOSIGNATURE
		CreativeCore_FORGE_v2.12.31_mc1.20.1.jar          |CreativeCore                  |creativecore                  |2.12.31             |DONE      |Manifest: NOSIGNATURE
	Crash Report UUID: e9f6642f-bd60-48c6-91cc-cd3576196fcb
	FML: 47.3
	Forge: net.minecraftforge:47.3.0```
@CreativeMD
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Can you send me this blueprint?

@iverson35
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BluePrint-Exception-1.txt

@iverson35
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In addition to that, I have discovered another blueprint that can cause a crash.
This blueprint can be normally imported as a blueprint item, but when attempting to place it, the game crashes. Here is the crash report:

@iverson35
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---- Minecraft Crash Report ----
// There are four lights!

Time: 2025-01-31 22:07:10
Description: Exception ticking world

java.lang.NullPointerException: Cannot invoke "team.creative.littletiles.common.structure.connection.children.StructureChildConnection.save(net.minecraft.nbt.CompoundTag)" because "child" is null
	at team.creative.littletiles.common.structure.connection.children.LevelChildrenList.save(LevelChildrenList.java:75) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.structure.LittleStructure.save(LittleStructure.java:463) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:mixin,re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.StructureParentCollection.saveExtra(StructureParentCollection.java:68) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.ParentCollection.save(ParentCollection.java:56) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.BlockParentCollection.saveExtra(BlockParentCollection.java:60) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.ParentCollection.save(ParentCollection.java:56) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.entity.BETiles.m_183515_(BETiles.java:482) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading,re:mixin}
	at net.minecraft.world.level.block.entity.BlockEntity.m_187482_(BlockEntity.java:77) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,re:mixin}
	at net.minecraft.world.level.block.entity.BlockEntity.m_187480_(BlockEntity.java:64) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,re:mixin}
	at team.creative.creativecore.common.be.BlockEntityCreative.m_5995_(BlockEntityCreative.java:45) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket.m_195642_(ClientboundBlockEntityDataPacket.java:21) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket.m_195640_(ClientboundBlockEntityDataPacket.java:25) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at team.creative.creativecore.common.be.BlockEntityCreative.m_58483_(BlockEntityCreative.java:28) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_288223_(ChunkHolder.java:243) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_288224_(ChunkHolder.java:235) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_288111_(ChunkHolder.java:221) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.network.protocol.game.ClientboundSectionBlocksUpdatePacket.m_132992_(ClientboundSectionBlocksUpdatePacket.java:68) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_140054_(ChunkHolder.java:220) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ServerChunkCache.m_184021_(ServerChunkCache.java:374) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheAccessor,pl:mixin:A}
	at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?] {}
	at net.minecraft.server.level.ServerChunkCache.m_8490_(ServerChunkCache.java:373) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheAccessor,pl:mixin:A}
	at net.minecraft.server.level.ServerChunkCache.m_201698_(ServerChunkCache.java:312) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheAccessor,pl:mixin:A}
	at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:305) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:893) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:89) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at java.lang.Thread.run(Thread.java:842) ~[?:?] {re:mixin}


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Suspected Mods: 
	CreativeCore (creativecore), Version: 2.12.31
		Issue tracker URL: https://github.com/CreativeMD/CreativeCore/issues
		at TRANSFORMER/[email protected]/team.creative.creativecore.common.be.BlockEntityCreative.m_5995_(BlockEntityCreative.java:45)

	LittleTiles (littletiles), Version: 1.6.0-pre152
		Issue tracker URL: https://github.com/CreativeMD/LittleTiles/issues
		at TRANSFORMER/[email protected]/team.creative.littletiles.common.structure.connection.children.LevelChildrenList.save(LevelChildrenList.java:75)
Stacktrace:
	at team.creative.littletiles.common.structure.connection.children.LevelChildrenList.save(LevelChildrenList.java:75) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.structure.LittleStructure.save(LittleStructure.java:463) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:mixin,re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.StructureParentCollection.saveExtra(StructureParentCollection.java:68) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.ParentCollection.save(ParentCollection.java:56) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.BlockParentCollection.saveExtra(BlockParentCollection.java:60) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.little.tile.parent.ParentCollection.save(ParentCollection.java:56) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading}
	at team.creative.littletiles.common.block.entity.BETiles.m_183515_(BETiles.java:482) ~[LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar%23159!/:1.6.0-pre152] {re:classloading,re:mixin}
	at net.minecraft.world.level.block.entity.BlockEntity.m_187482_(BlockEntity.java:77) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,re:mixin}
	at net.minecraft.world.level.block.entity.BlockEntity.m_187480_(BlockEntity.java:64) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,re:mixin}
	at team.creative.creativecore.common.be.BlockEntityCreative.m_5995_(BlockEntityCreative.java:45) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket.m_195642_(ClientboundBlockEntityDataPacket.java:21) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket.m_195640_(ClientboundBlockEntityDataPacket.java:25) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at team.creative.creativecore.common.be.BlockEntityCreative.m_58483_(BlockEntityCreative.java:28) ~[CreativeCore_FORGE_v2.12.31_mc1.20.1.jar%23158!/:2.12.31] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_288223_(ChunkHolder.java:243) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_288224_(ChunkHolder.java:235) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_288111_(ChunkHolder.java:221) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.network.protocol.game.ClientboundSectionBlocksUpdatePacket.m_132992_(ClientboundSectionBlocksUpdatePacket.java:68) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ChunkHolder.m_140054_(ChunkHolder.java:220) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading}
	at net.minecraft.server.level.ServerChunkCache.m_184021_(ServerChunkCache.java:374) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheAccessor,pl:mixin:A}
	at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?] {}
	at net.minecraft.server.level.ServerChunkCache.m_8490_(ServerChunkCache.java:373) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheAccessor,pl:mixin:A}
	at net.minecraft.server.level.ServerChunkCache.m_201698_(ServerChunkCache.java:312) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:littletiles.mixins.json:server.level.ServerChunkCacheAccessor,pl:mixin:A}
	at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:305) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.ServerLevelMixin,pl:mixin:A}
-- Affected level --
Details:
	All players: 1 total; [ServerPlayer['ignis'/92, l='ServerLevel[ltdebug]', x=13.04, y=-60.00, z=-3.92]]
	Chunk stats: 8649
	Level dimension: minecraft:overworld
	Level spawn location: World: (0,-60,0), Section: (at 0,4,0 in 0,-4,0; chunk contains blocks 0,-64,0 to 15,319,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
	Level time: 7188 game time, 7188 day time
	Level name: ltdebug
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
	Level weather: Rain time: 38753 (now: false), thunder time: 170936 (now: false)
	Known server brands: forge
	Removed feature flags: 
	Level was modded: true
	Level storage version: 0x04ABD - Anvil
Stacktrace:
	at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:893) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:89) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[client-1.20.1-20230612.114412-srg.jar%23160!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:littletiles.mixins.json:server.level.MinecraftServerAccessor,pl:mixin:A}
	at java.lang.Thread.run(Thread.java:842) ~[?:?] {re:mixin}


-- System Details --
Details:
	Minecraft Version: 1.20.1
	Minecraft Version ID: 1.20.1
	Operating System: Windows 11 (amd64) version 10.0
	Java Version: 17.0.10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing), Oracle Corporation
	Memory: 698493744 bytes (666 MiB) / 2046820352 bytes (1952 MiB) up to 5045747712 bytes (4812 MiB)
	CPUs: 32
	Processor Vendor: GenuineIntel
	Processor Name: 13th Gen Intel(R) Core(TM) i9-13980HX
	Identifier: Intel64 Family 6 Model 183 Stepping 1
	Microarchitecture: unknown
	Frequency (GHz): 2.42
	Number of physical packages: 1
	Number of physical CPUs: 24
	Number of logical CPUs: 32
	Graphics card #0 name: NVIDIA GeForce RTX 4070 Laptop GPU
	Graphics card #0 vendor: NVIDIA (0x10de)
	Graphics card #0 VRAM (MB): 4095.00
	Graphics card #0 deviceId: 0x2860
	Graphics card #0 versionInfo: DriverVersion=32.0.15.6607
	Graphics card #1 name: Intel(R) UHD Graphics
	Graphics card #1 vendor: Intel Corporation (0x8086)
	Graphics card #1 VRAM (MB): 128.00
	Graphics card #1 deviceId: 0xa788
	Graphics card #1 versionInfo: DriverVersion=31.0.101.5186
	Memory slot #0 capacity (MB): 16384.00
	Memory slot #0 clockSpeed (GHz): 5.60
	Memory slot #0 type: Unknown
	Virtual memory max (MB): 43650.46
	Virtual memory used (MB): 21760.57
	Swap memory total (MB): 27648.00
	Swap memory used (MB): 1673.02
	JVM Flags: 6 total; -XX:+UseG1GC -XX:-UseAdaptiveSizePolicy -XX:-OmitStackTraceInFastThrow -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmn721m -Xmx4812m
	Server Running: true
	Player Count: 1 / 8; [ServerPlayer['ignis'/92, l='ServerLevel[ltdebug]', x=13.04, y=-60.00, z=-3.92]]
	Data Packs: vanilla, mod:mixinextras (incompatible), mod:forge, mod:littletiles, mod:creativecore
	Enabled Feature Flags: minecraft:vanilla
	World Generation: Stable
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'forge'; Server brand changed to 'forge'
	Launched Version: LTDebug
	ModLauncher: 10.0.9+10.0.9+main.dcd20f30
	ModLauncher launch target: forgeclient
	ModLauncher naming: srg
	ModLauncher services: 
		mixin-0.8.5.jar mixin PLUGINSERVICE 
		eventbus-6.0.5.jar eventbus PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar slf4jfixer PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar object_holder_definalize PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar runtime_enum_extender PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar capability_token_subclass PLUGINSERVICE 
		accesstransformers-8.0.4.jar accesstransformer PLUGINSERVICE 
		fmlloader-1.20.1-47.3.0.jar runtimedistcleaner PLUGINSERVICE 
		modlauncher-10.0.9.jar mixin TRANSFORMATIONSERVICE 
		modlauncher-10.0.9.jar fml TRANSFORMATIONSERVICE 
	FML Language Providers: 
		[email protected]
		lowcodefml@null
		javafml@null
	Mod List: 
		client-1.20.1-20230612.114412-srg.jar             |Minecraft                     |minecraft                     |1.20.1              |DONE      |Manifest: a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f
		mixinextras-forge-0.4.1.jar                       |MixinExtras                   |mixinextras                   |0.4.1               |DONE      |Manifest: NOSIGNATURE
		forge-1.20.1-47.3.0-universal.jar                 |Forge                         |forge                         |47.3.0              |DONE      |Manifest: 84:ce:76:e8:45:35:e4:0e:63:86:df:47:59:80:0f:67:6c:c1:5f:6e:5f:4d:b3:54:47:1a:9f:7f:ed:5e:f2:90
		LittleTiles_BETA_v1.6.0-pre152_mc1.20.1.jar       |LittleTiles                   |littletiles                   |1.6.0-pre152        |DONE      |Manifest: NOSIGNATURE
		CreativeCore_FORGE_v2.12.31_mc1.20.1.jar          |CreativeCore                  |creativecore                  |2.12.31             |DONE      |Manifest: NOSIGNATURE
	Crash Report UUID: cc5c44e7-0bf2-4517-b13e-8ecb4d4fbab4
	FML: 47.3
	Forge: net.minecraftforge:47.3.0

And the blueprint:

BluePrint-Exception-2.txt

@CreativeMD
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This issue has been fixed for 1.21.1. Unfortunately there will be no fix for 1.20. Sorry, but I recommend to update if possible.

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@CreativeMD @iverson35