Crash on server join
GormAuslander opened this issue · 5 comments
Issue:
When loading a new world, the mod works fine with no issues. When trying to join a server, it crashes the client.
Minecraft version 1.20.1
litematica-fabric-1.20.1-0.15.5
malilib-fabric-1.20.1-0.16.3
Other mods:
Architectury [9.2.14]
Axiom [4.1.1]
Biome Replacer [1.7-mc1.20]
Chunky [1.3.146]
Clockwork: Create x Valkyrien Skies [1.20.1-0.1.16-fabric-b3b22e39fe]
Create [0.5.1-j-build.1631+mc1.20.1]
Create Big Cannons [5.8.2]
Distant Horizons [2.2.1-a]
Fabric API [0.92.3+1.20.1]
Get Off My Lawn ReServed [1.9.4+1.20.1]
Indium [1.0.34+mc1.20.1]
Iris [1.7.5+mc1.20.1]
Just Enough Items [15.20.0.105]
Litematica [0.15.5]
MaLiLib [0.16.3]
Mod Menu [7.2.2]
Sodium [0.5.11+mc1.20.1]
Tectonic [2.4.1b]
Terralith [2.5.4]
VS Eureka Mod [1.5.1-beta.3]
Valkyrien Skies 2 [2.3.0-beta.5]
WorldEdit [7.2.15+6463-5ca4dff]
WorldGen [1.0.4]
Xaero's Minimap [24.7.1]
Xaero's World Map [1.39.2]
YUNG's API [1.20-Fabric-4.0.6]
YUNG's Better Desert Temples [1.20-Fabric-3.0.3]
YUNG's Better Dungeons [1.20-Fabric-4.0.4]
YUNG's Better End Island [1.20-Fabric-2.0.6]
YUNG's Better Jungle Temples [1.20-Fabric-2.0.5]
YUNG's Better Mineshafts [1.20-Fabric-4.0.4]
YUNG's Better Nether Fortresses [1.20-Fabric-2.0.6]
YUNG's Better Ocean Monuments [1.20-Fabric-3.0.4]
YUNG's Better Strongholds [1.20-Fabric-4.0.3]
Full crash report
// Don't do that.
Time: 2025-01-13 18:02:52
Description: Unexpected error
java.lang.ClassCastException: class fi.dy.masa.litematica.world.WorldSchematic cannot be cast to class net.minecraft.class_638 (fi.dy.masa.litematica.world.WorldSchematic and net.minecraft.class_638 are in unnamed module of loader 'knot' @3c87521)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.redirect$eea000$valkyrienskies$renderShipBlockEntityInShipyard(SodiumWorldRenderer.java:1570)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderBlockEntity(SodiumWorldRenderer.java:347)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.redirect$ckk000$iris$addToList(SodiumWorldRenderer.java:583)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderBlockEntities(SodiumWorldRenderer.java:306)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.redirect$eea000$valkyrienskies$renderShipBlockEntities(SodiumWorldRenderer.java:1596)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderBlockEntities(SodiumWorldRenderer.java:269)
at knot//net.minecraft.class_761.handler$dkh000$sodium$onRenderBlockEntities(class_761.java:14599)
at knot//net.minecraft.class_761.method_22710(class_761.java:1372)
at knot//net.minecraft.class_757.method_3188(class_757.java:1110)
at knot//net.minecraft.class_757.method_3192(class_757.java:880)
at knot//net.minecraft.class_310.method_1523(class_310.java:1219)
at knot//net.minecraft.class_310.method_1514(class_310.java:802)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Render thread
Stacktrace:
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.redirect$eea000$valkyrienskies$renderShipBlockEntityInShipyard(SodiumWorldRenderer.java:1570)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderBlockEntity(SodiumWorldRenderer.java:347)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.redirect$ckk000$iris$addToList(SodiumWorldRenderer.java:583)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderBlockEntities(SodiumWorldRenderer.java:306)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.redirect$eea000$valkyrienskies$renderShipBlockEntities(SodiumWorldRenderer.java:1596)
at knot//me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderBlockEntities(SodiumWorldRenderer.java:269)
at knot//net.minecraft.class_761.handler$dkh000$sodium$onRenderBlockEntities(class_761.java:14599)
at knot//net.minecraft.class_761.method_22710(class_761.java:1372)
at knot//net.minecraft.class_757.method_3188(class_757.java:1110)
-- Affected level --
Details:
All players: 1 total; [class_746['Lighte_Amethyst'/12, l='ClientLevel', x=320.78, y=42.68, z=439.33]]
Chunk stats: 4096, 1021
Level dimension: minecraft:overworld
Level spawn location: World: (0,0,0), Section: (at 0,0,0 in 0,0,0; chunk contains blocks 0,-64,0 to 15,639,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,639,511)
Level time: 952755 game time, 1000 day time
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at knot//net.minecraft.class_638.method_8538(class_638.java:458)
at knot//net.minecraft.class_310.method_1587(class_310.java:2406)
at knot//net.minecraft.class_310.method_1514(class_310.java:826)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)
-- Last reload --
Details:
Reload number: 1
Reload reason: initial
Finished: Yes
Packs: vanilla, fabric, file/better-panorama-classic, file/Builders Pack, file/§fBetter §2§lLeaves §71.21.zip, file/Raine_Remover
-- System Details --
Details:
Minecraft Version: 1.20.1
Minecraft Version ID: 1.20.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 17.0.8, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 14515110416 bytes (13842 MiB) / 17045651456 bytes (16256 MiB) up to 32531021824 bytes (31024 MiB)
CPUs: 24
Processor Vendor: GenuineIntel
Processor Name: 12th Gen Intel(R) Core(TM) i9-12900K
Identifier: Intel64 Family 6 Model 151 Stepping 2
Microarchitecture: Alder Lake
Frequency (GHz): 3.19
Number of physical packages: 1
Number of physical CPUs: 16
Number of logical CPUs: 24
Graphics card #0 name: Parsec Virtual Display Adapter
Graphics card #0 vendor: Parsec Cloud, Inc.
Graphics card #0 VRAM (MB): 0.00
Graphics card #0 deviceId: unknown
Graphics card #0 versionInfo: DriverVersion=0.41.0.0
Graphics card #1 name: NVIDIA GeForce RTX 4090
Graphics card #1 vendor: NVIDIA (0x10de)
Graphics card #1 VRAM (MB): 4095.00
Graphics card #1 deviceId: 0x2684
Graphics card #1 versionInfo: DriverVersion=32.0.15.6636
Graphics card #2 name: Intel(R) UHD Graphics 770
Graphics card #2 vendor: Intel Corporation (0x8086)
Graphics card #2 VRAM (MB): 2048.00
Graphics card #2 deviceId: 0x4680
Graphics card #2 versionInfo: DriverVersion=32.0.101.5542
Memory slot #0 capacity (MB): 16384.00
Memory slot #0 clockSpeed (GHz): 12.80
Memory slot #0 type: Unknown
Memory slot #1 capacity (MB): 16384.00
Memory slot #1 clockSpeed (GHz): 12.80
Memory slot #1 type: Unknown
Virtual memory max (MB): 75531.98
Virtual memory used (MB): 55414.20
Swap memory total (MB): 43008.00
Swap memory used (MB): 2021.05
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms16256m -Xmx31024m
Fabric Mods:
architectury: Architectury 9.2.14
axiom: Axiom 4.1.1
com_moulberry_axiomclientapi_axiomclientapi_: axiomclientapi 1.0.0
com_moulberry_mixinconstraints: mixinconstraints 1.0.1
betterdeserttemples: YUNG's Better Desert Temples 1.20-Fabric-3.0.3
org_reflections_reflections: reflections 0.10.2
betterdungeons: YUNG's Better Dungeons 1.20-Fabric-4.0.4
betterendisland: YUNG's Better End Island 1.20-Fabric-2.0.6
betterfortresses: YUNG's Better Nether Fortresses 1.20-Fabric-2.0.6
betterjungletemples: YUNG's Better Jungle Temples 1.20-Fabric-2.0.5
bettermineshafts: YUNG's Better Mineshafts 1.20-Fabric-4.0.4
betteroceanmonuments: YUNG's Better Ocean Monuments 1.20-Fabric-3.0.4
betterstrongholds: YUNG's Better Strongholds 1.20-Fabric-4.0.3
biome_replacer: Biome Replacer 1.7-mc1.20
chunky: Chunky 1.3.146
create: Create 0.5.1-j-build.1631+mc1.20.1
com_google_code_findbugs_jsr305: jsr305 3.0.2
flywheel: Flywheel 0.6.11-4
forgeconfigapiport: Forge Config API Port 8.0.0
milk: Milk Lib 1.2.60
dripstone_fluid_lib: Dripstone Fluid Lib 3.0.2
porting_lib_accessors: Porting Lib Accessors 2.3.8+1.20.1
porting_lib_base: Porting Lib Base 2.3.8+1.20.1
com_electronwill_night-config_core: core 3.6.6
com_electronwill_night-config_toml: toml 3.6.6
porting_lib_config: Porting Lib Config 2.3.8+1.20.1
porting_lib_gui_utils: Porting Lib Gui Utils 2.3.8+1.20.1
porting_lib_lazy_registration: Porting Lib Lazy Register 2.3.8+1.20.1
porting_lib_mixin_extensions: Porting Lib Mixin Extensions 2.3.8+1.20.1
porting_lib_brewing: Porting Lib Brewing 2.3.8+1.20.1
porting_lib_client_events: Porting Lib Client Events 2.3.8+1.20.1
porting_lib_entity: Porting Lib Entity 2.3.8+1.20.1
porting_lib_extensions: Porting Lib Extensions 2.3.8+1.20.1
porting_lib_attributes: Porting Lib Attributes 2.3.8+1.20.1
porting_lib_common: Porting Lib Common 2.3.8+1.20.1
porting_lib_models: Porting Lib Models 2.3.8+1.20.1
porting_lib_networking: Porting Lib Networking 2.3.8+1.20.1
porting_lib_core: Porting Lib Core 2.3.8+1.20.1
porting_lib_obj_loader: Porting Lib Obj Loader 2.3.8+1.20.1
porting_lib_model_loader: Porting Lib Model Loader 2.3.8+1.20.1
porting_lib_tags: Porting Lib Tags 3.0
porting_lib_tool_actions: Porting Lib Tool Actions 2.3.8+1.20.1
porting_lib_transfer: Porting Lib Transfer 2.3.8+1.20.1
porting_lib_fluids: Porting Lib Fluids 2.3.8+1.20.1
reach-entity-attributes: Reach Entity Attributes 2.4.0
registrate-fabric: Registrate for Fabric 1.3.79-MC1.20.1
porting_lib_data: Porting Lib Data 2.1.1090+1.20
porting_lib_model_generators: Porting Lib Model Generators 2.1.1090+1.20
porting_lib_model_materials: Porting Lib Model Materials 2.1.1090+1.20
createbigcannons: Create Big Cannons 5.8.2
ritchiesprojectilelib: Ritchie's Projectile Library 2.0.0-dev+mc.1.20.1-fabric-build.182
porting_lib_utility: Porting Lib Utility 2.1.1127+1.20
porting_lib_gametest: Porting Lib GameTest 2.1.1127+1.20
distanthorizons: Distant Horizons 2.2.1-a
fabric-api: Fabric API 0.92.3+1.20.1
fabric-api-base: Fabric API Base 0.4.31+1802ada577
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.36+1802ada577
fabric-biome-api-v1: Fabric Biome API (v1) 13.0.13+1802ada577
fabric-block-api-v1: Fabric Block API (v1) 1.0.11+1802ada577
fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.1+1802ada577
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.41+1802ada577
fabric-client-tags-api-v1: Fabric Client Tags 1.1.2+1802ada577
fabric-command-api-v1: Fabric Command API (v1) 1.2.34+f71b366f77
fabric-command-api-v2: Fabric Command API (v2) 2.2.13+1802ada577
fabric-commands-v0: Fabric Commands (v0) 0.2.51+df3654b377
fabric-containers-v0: Fabric Containers (v0) 0.1.65+df3654b377
fabric-content-registries-v0: Fabric Content Registries (v0) 4.0.12+1802ada577
fabric-convention-tags-v1: Fabric Convention Tags 1.5.5+1802ada577
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.19+1802ada577
fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.0.1+de0fd6d177
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 12.3.5+1802ada577
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.54+1802ada577
fabric-entity-events-v1: Fabric Entity Events (v1) 1.6.0+1c78457f77
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.6.3+13a40c6677
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.63+df3654b377
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.40+1802ada577
fabric-item-api-v1: Fabric Item API (v1) 2.1.28+1802ada577
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.0.13+1802ada577
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.37+1802ada577
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.35+df3654b377
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.2.22+1802ada577
fabric-loot-api-v2: Fabric Loot API (v2) 1.2.2+1802ada577
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.1.46+9e7660c677
fabric-message-api-v1: Fabric Message API (v1) 5.1.9+1802ada577
fabric-mining-level-api-v1: Fabric Mining Level API (v1) 2.1.51+1802ada577
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 1.0.3+1802ada577
fabric-models-v0: Fabric Models (v0) 0.4.2+9386d8a777
fabric-networking-api-v1: Fabric Networking API (v1) 1.3.12+13a40c6677
fabric-networking-v0: Fabric Networking (v0) 0.3.52+df3654b377
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 11.1.4+1802ada577
fabric-particles-v1: Fabric Particles (v1) 1.1.2+1802ada577
fabric-recipe-api-v1: Fabric Recipe API (v1) 1.0.22+1802ada577
fabric-registry-sync-v0: Fabric Registry Sync (v0) 2.3.4+1802ada577
fabric-renderer-api-v1: Fabric Renderer API (v1) 3.2.1+1802ada577
fabric-renderer-indigo: Fabric Renderer - Indigo 1.5.2+85287f9f77
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.46+df3654b377
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.37+92a0d36777
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.0.28+1802ada577
fabric-rendering-v0: Fabric Rendering (v0) 1.1.49+df3654b377
fabric-rendering-v1: Fabric Rendering (v1) 3.0.8+1802ada577
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 2.3.8+1802ada577
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.11.11+fb82e9d777
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.8+1802ada577
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.31+1802ada577
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.13+1802ada577
fabric-transfer-api-v1: Fabric Transfer API (v1) 3.3.5+8dd72ea377
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 4.3.1+1802ada577
fabricloader: Fabric Loader 0.16.10
mixinextras: MixinExtras 0.4.1
goml: Get Off My Lawn ReServed 1.9.4+1.20.1
cardinal-components-base: Cardinal Components API (base) 5.2.2
cardinal-components-world: Cardinal Components API (worlds) 5.2.2
common-protection-api: Common Protection API 1.0.0
fabric-permissions-api-v0: fabric-permissions-api 0.2-SNAPSHOT
placeholder-api: Placeholder API 2.1.3+1.20.1
playerabilitylib: Pal 1.8.0
polymer-core: Polymer (Core) 0.5.16+1.20.1
polymer-networking: Polymer (Networking) 0.5.16+1.20.1
polymer-common: Polymer (Common) 0.5.16+1.20.1
polymer-registry-sync-manipulator: Polymer (Registry Sync Manipulator) 0.5.16+1.20.1
rtree-3i-lite-fabric: rtree-3i-lite for Fabric 0.3.0
server_translations_api: Server Translations API 2.0.0+1.20
packet_tweaker: Packet Tweaker 0.4.0+1.19.4
sgui: sgui 1.2.2+1.20
indium: Indium 1.0.34+mc1.20.1
iris: Iris 1.7.5+mc1.20.1
io_github_douira_glsl-transformer: glsl-transformer 2.0.1
org_anarres_jcpp: jcpp 1.4.14
org_antlr_antlr4-runtime: antlr4-runtime 4.13.1
java: OpenJDK 64-Bit Server VM 17
jei: Just Enough Items 15.20.0.105
litematica: Litematica 0.15.4
malilib: MaLiLib 0.16.3
minecraft: Minecraft 1.20.1
modmenu: Mod Menu 7.2.2
sodium: Sodium 0.5.11+mc1.20.1
tectonic: Tectonic 2.4.1b
terralith: Terralith 2.5.4
valkyrienskies: Valkyrien Skies 2 2.3.0-beta.5
cloth-config: Cloth Config v11 11.1.106
cloth-basic-math: cloth-basic-math 0.6.1
fabric-language-kotlin: Fabric Language Kotlin 1.10.10+kotlin.1.9.10
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 1.9.10
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 1.9.10
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 1.9.10
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 1.9.10
org_jetbrains_kotlinx_atomicfu-jvm: atomicfu-jvm 0.22.0
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.7.3
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.7.3
org_jetbrains_kotlinx_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.4.0
org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.6.0
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.6.0
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.6.0
vs_clockwork: Clockwork: Create x Valkyrien Skies 1.20.1-0.1.16-fabric-b3b22e39fe
vs_eureka: VS Eureka Mod 1.5.1-beta.3
world-gen: WorldGen 1.0.4
worldedit: WorldEdit 7.2.15+6463-5ca4dff
xaerominimap: Xaero's Minimap 24.7.1
xaeroworldmap: Xaero's World Map 1.39.2
yungsapi: YUNG's API 1.20-Fabric-4.0.6
org_javassist_javassist: javassist 3.29.2-GA
Loaded Shaderpack: (off)
Flywheel Backend: GL33 Instanced Arrays
Launched Version: 1.20.1
Backend library: LWJGL version 3.3.1 SNAPSHOT
Backend API: NVIDIA GeForce RTX 4090/PCIe/SSE2 GL version 3.2.0 NVIDIA 566.36, NVIDIA Corporation
Window size: 854x480
GL Caps: Using framebuffer using OpenGL 3.2
GL debug messages:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'; Server brand changed to 'fabric'
Type: Integrated Server (map_client.txt)
Graphics mode: fancy
Resource Packs: vanilla, fabric, file/better-panorama-classic, file/Builders Pack, file/§fBetter §2§lLeaves §71.21.zip (incompatible), file/Raine_Remover
Current Language: en_us
CPU: 24x 12th Gen Intel(R) Core(TM) i9-12900K
Server Running: true
Player Count: 1 / 8; [class_3222['Lighte_Amethyst'/12, l='ServerLevel[Vikdal]', x=320.78, y=42.68, z=439.33]]
Data Packs: vanilla, fabric, tectonic/terratonic, tectonic/increased_height_terratonic
Enabled Feature Flags: minecraft:vanilla
World Generation: Experimental
</details>
What exactly causes the crash? Because it only does this on some worlds. Any fix in the pipeline?
Your conflicting mod is Valkyrien Skies 2 [2.3.0-beta.5]. It's a know crash point.
It's not a crash for Litematica to fix; because Valkyrien Skies is trying to cast the Schematic World incorrectly; when it should not be touching it. The Schematic World does not need any external interference.
Based on the crash report alone, I think it only happens if there are block entities being rendered? So it depends on what blocks are in the world around the player within render distance. And like Sakura said, this can't be fixed from Litematica's side (without rewriting how the schematic world class works/which vanilla class it extends), as the crash happens in Valkyrien Skies code, when it tries to use the schematic world as something that it isn't (casting it to the vanilla ClientWorld class).