Greetings, I just wanted to see how Minecraft would run with Geckolib installed without actually adding any Mobs with it. And it basically just keeps crashing because of some method returning null. It seems like it usually happens when I rejoin my world or switch dimension.

Here is the crash in question:

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 2023-08-31 13:43:18
Description: Unexpected error

java.lang.NullPointerException: Cannot invoke "net.minecraft.entity.Entity.isSneaky()" because "this.currentEntity" is null
at software.bernie.geckolib.renderer.GeoReplacedEntityRenderer.hasLabel(GeoReplacedEntityRenderer.java:384)
at net.minecraft.client.render.entity.EntityRenderer.shadowShouldShowName(EntityRenderer.java:519)
at net.minecraft.client.render.WorldRenderer.handler$zze000$entityculling$renderEntity(WorldRenderer.java:3451)
at net.minecraft.client.render.WorldRenderer.renderEntity(WorldRenderer.java)
at net.minecraft.client.render.WorldRenderer.render(WorldRenderer.java:1324)
at net.minecraft.client.render.GameRenderer.renderWorld(GameRenderer.java:1110)
at net.minecraft.client.render.GameRenderer.render(GameRenderer.java:880)
at net.minecraft.client.MinecraftClient.render(MinecraftClient.java:1219)
at net.minecraft.client.MinecraftClient.run(MinecraftClient.java:802)
at net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:468)
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 net.fabricmc.devlaunchinjector.Main.main(Main.java:86)

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

-- Head --
Thread: Render thread
Stacktrace:
at software.bernie.geckolib.renderer.GeoReplacedEntityRenderer.hasLabel(GeoReplacedEntityRenderer.java:384)
at net.minecraft.client.render.entity.EntityRenderer.shadowShouldShowName(EntityRenderer.java:519)
at net.minecraft.client.render.WorldRenderer.handler$zze000$entityculling$renderEntity(WorldRenderer.java:3451)
at net.minecraft.client.render.WorldRenderer.renderEntity(WorldRenderer.java)
at net.minecraft.client.render.WorldRenderer.render(WorldRenderer.java:1324)
at net.minecraft.client.render.GameRenderer.renderWorld(GameRenderer.java:1110)

-- Affected level --
Details:
All players: 1 total; [ClientPlayerEntity['Player877'/101, l='ClientLevel', x=638.84, y=111.98, z=-261.69]]
Chunk stats: 4096, 39
Level dimension: minecraft:overworld
Level spawn location: World: (0,68,0), 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: 211566 game time, 33558 day time
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.world.ClientWorld.addDetailsToCrashReport(ClientWorld.java:458)
at net.minecraft.client.MinecraftClient.addDetailsToCrashReport(MinecraftClient.java:2406)
at net.minecraft.client.MinecraftClient.run(MinecraftClient.java:826)
at net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:468)
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 net.fabricmc.devlaunchinjector.Main.main(Main.java:86)

-- Last reload --
Details:
Reload number: 1
Reload reason: initial
Finished: Yes
Packs: vanilla, fabric

-- System Details --
Details:
Minecraft Version: 1.20
Minecraft Version ID: 1.20
Operating System: Linux (amd64) version 6.4.12-arch1-1
Java Version: 17.0.8.1, N/A
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1050592048 bytes (1001 MiB) / 2598371328 bytes (2478 MiB) up to 4135583744 bytes (3944 MiB)
CPUs: 20
Processor Vendor: GenuineIntel
Processor Name: 13th Gen Intel(R) Core(TM) i5-13500
Identifier: Intel64 Family 6 Model 191 Stepping 2
Microarchitecture: unknown
Frequency (GHz): -0.00
Number of physical packages: 1
Number of physical CPUs: 14
Number of logical CPUs: 20
Graphics card #0 name: AlderLake-S GT1
Graphics card #0 vendor: Intel Corporation (0x8086)
Graphics card #0 VRAM (MB): 256.00
Graphics card #0 deviceId: 0x4680
Graphics card #0 versionInfo: unknown
Graphics card #1 name: Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]
Graphics card #1 vendor: Advanced Micro Devices, Inc. [AMD/ATI] (0x1002)
Graphics card #1 VRAM (MB): 8194.00
Graphics card #1 deviceId: 0x67df
Graphics card #1 versionInfo: unknown
Virtual memory max (MB): 7885.31
Virtual memory used (MB): 10187.47
Swap memory total (MB): 0.00
Swap memory used (MB): 0.00
JVM Flags: 0 total;
Fabric Mods:
entityculling: EntityCulling-Fabric 1.6.2-mc1.20
fabric-api: Fabric API 0.87.0+1.20.1
fabric-api-base: Fabric API Base 0.4.30+7abfd51577
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.35+4d8536c977
fabric-biome-api-v1: Fabric Biome API (v1) 13.0.10+b3afc78b77
fabric-block-api-v1: Fabric Block API (v1) 1.0.9+e022e5d177
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.40+b3afc78b77
fabric-client-tags-api-v1: Fabric Client Tags 1.1.1+97bb207577
fabric-command-api-v1: Fabric Command API (v1) 1.2.33+f71b366f77
fabric-command-api-v2: Fabric Command API (v2) 2.2.12+b3afc78b77
fabric-commands-v0: Fabric Commands (v0) 0.2.50+df3654b377
fabric-containers-v0: Fabric Containers (v0) 0.1.63+df3654b377
fabric-content-registries-v0: Fabric Content Registries (v0) 4.0.9+b3afc78b77
fabric-convention-tags-v1: Fabric Convention Tags 1.5.4+a1a980da77
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.18+aeb40ebe77
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 12.2.2+1e61dba177
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.53+8536527b77
fabric-entity-events-v1: Fabric Entity Events (v1) 1.5.22+b3afc78b77
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.6.1+e91849a877
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.62+df3654b377
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.38+b04edc7a77
fabric-gametest-api-v1: Fabric Game Test API (v1) 1.2.12+b3afc78b77
fabric-item-api-v1: Fabric Item API (v1) 2.1.27+b3afc78b77
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.0.10+23d9108177
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.36+fb8d95da77
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.34+df3654b377
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.2.21+b3afc78b77
fabric-loot-api-v2: Fabric Loot API (v2) 1.1.39+b3afc78b77
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.1.43+9e7660c677
fabric-message-api-v1: Fabric Message API (v1) 5.1.7+3265161977
fabric-mining-level-api-v1: Fabric Mining Level API (v1) 2.1.49+b3afc78b77
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 1.0.2+709a987177
fabric-models-v0: Fabric Models (v0) 0.4.1+9386d8a777
fabric-networking-api-v1: Fabric Networking API (v1) 1.3.10+eeb8eb3677
fabric-networking-v0: Fabric Networking (v0) 0.3.50+df3654b377
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 11.1.1+6beca84877
fabric-particles-v1: Fabric Particles (v1) 1.1.1+201a23a077
fabric-recipe-api-v1: Fabric Recipe API (v1) 1.0.20+b3afc78b77
fabric-registry-sync-v0: Fabric Registry Sync (v0) 2.3.2+4df89eb277
fabric-renderer-api-v1: Fabric Renderer API (v1) 3.1.2+6bdb2ed077
fabric-renderer-indigo: Fabric Renderer - Indigo 1.4.2+6bdb2ed077
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.45+df3654b377
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.34+b3afc78b77
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.0.27+b3afc78b77
fabric-rendering-v0: Fabric Rendering (v0) 1.1.48+df3654b377
fabric-rendering-v1: Fabric Rendering (v1) 3.0.7+b3afc78b77
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 2.3.5+ea08f9d877
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.11.9+132c48c177
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.7+b3afc78b77
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.29+b3afc78b77
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.12+b3afc78b77
fabric-transfer-api-v1: Fabric Transfer API (v1) 3.3.0+cdf060b277
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 4.3.0+6c31357e77
fabricloader: Fabric Loader 0.14.22
geckolib: Geckolib 4.2.2
gplus: gPlus 17
immediatelyfast: ImmediatelyFast 1.1.15+1.20.1
com_github_llamalad7_mixinextras: MixinExtras 0.2.0-beta.8
net_lenni0451_reflect: Reflect 1.1.0
java: OpenJDK 64-Bit Server VM 17
lazydfu: LazyDFU 0.1.3
lithium: Lithium 0.11.2
minecraft: Minecraft 1.20
mm: Manningham Mills 2.3
modmenu: Mod Menu 7.0.1
renderer: Renderer 1.0
satin: Satin 1.14.0
sodium: Sodium 0.4.10+build.27
sodium-extra: Sodium Extra 0.4.20+mc1.20-build.103
caffeineconfig: CaffeineConfig 1.1.0+1.17
crowdin-translate: CrowdinTranslate 1.4+1.19.3
starlight: Starlight 1.1.2+fabric.dbc156f
Launched Version: Fabric
Backend library: LWJGL version 3.3.1 SNAPSHOT
Backend API: AMD Radeon RX 570 Series (polaris10, LLVM 15.0.7, DRM 3.52, 6.4.12-arch1-1) GL version 4.6 (Core Profile) Mesa 23.1.6, AMD
Window size: 1920x1080
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: fast
Resource Packs: vanilla, fabric
Current Language: en_us
CPU: 20x 13th Gen Intel(R) Core(TM) i5-13500
Server Running: true
Player Count: 1 / 8; [ServerPlayerEntity['Player877'/101, l='ServerLevel[dev-4]', x=638.84, y=111.98, z=-261.69]]
Data Packs: vanilla, fabric
Enabled Feature Flags: minecraft:vanilla
World Generation: Experimental
#@!@# Game crashed! Crash report saved to: #@!@# /home/gfh/gPlus/run/crash-reports/crash-2023-08-31_13.43.18-client.txt

Process finished with exit code 255

It might be better for you to join the discord for support. Having conversations is easier there.

That said, two questions:
Are you completely sure that there are no mods using GeckoLib in your modlist?
What happens if you remove EntityCulling ?

Looks like that fixed it, thank you very much!