---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 2/5/22, 12:10 PM
Description: Exception in server tick loop

java.lang.UnsupportedOperationException
	at java.base/java.util.AbstractList.add(AbstractList.java:153)
	at net.minecraft.class_2371.add(class_2371.java:61)
	at java.base/java.util.AbstractList.add(AbstractList.java:111)
	at net.minecraft.class_1309.md642b20$lambda$replaceWithGrave$1$7(class_1309.java:7179)
	at eu.pb4.graves.GravesMod.lambda$onInitialize$4(GravesMod.java:92)
	at net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.lambda$static$2(ServerTickEvents.java:62)
	at net.minecraft.server.MinecraftServer.handler$zbm000$onEndTick(MinecraftServer.java:1793)
	at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:861)
	at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:684)
	at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:270)
	at java.base/java.lang.Thread.run(Thread.java:833)


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

-- System Details --
Details:
	Minecraft Version: 1.18.1
	Minecraft Version ID: 1.18.1
	Operating System: Linux (aarch64) version 5.8.0-1037-oracle
	Java Version: 17.0.2, Eclipse Adoptium
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Eclipse Adoptium
	Memory: 2870070416 bytes (2737 MiB) / 4294967296 bytes (4096 MiB) up to 4294967296 bytes (4096 MiB)
	CPUs: 4
	Processor Vendor: aarch64
	Processor Name: 
	Identifier: aarch64 Family 8 Model 0xd0c Stepping r0x3p1
	Microarchitecture: unknown
	Frequency (GHz): -0.00
	Number of physical packages: 1
	Number of physical CPUs: 1
	Number of logical CPUs: 4
	Graphics card #0 name: unknown
	Graphics card #0 vendor: unknown
	Graphics card #0 VRAM (MB): 0.00
	Graphics card #0 deviceId: unknown
	Graphics card #0 versionInfo: unknown
	Virtual memory max (MB): 11936.84
	Virtual memory used (MB): 5475.98
	Swap memory total (MB): 0.00
	Swap memory used (MB): 0.00
	JVM Flags: 2 total; -Xmx4G -Xms4G
	Fabric Mods: 
		club_minnced_discord-webhooks: discord-webhooks 0.7.2
		com_fasterxml_jackson_core_jackson-annotations: jackson-annotations 2.10.1
		com_fasterxml_jackson_core_jackson-core: jackson-core 2.10.1
		com_fasterxml_jackson_core_jackson-databind: jackson-databind 2.10.1
		com_neovisionaries_nv-websocket-client: nv-websocket-client 2.14
		com_squareup_okhttp3_okhttp: okhttp 3.14.9
		com_squareup_okio_okio: okio 1.17.2
		com_vdurmont_emoji-java: emoji-java 5.1.1
		com_velocitypowered_velocity-native: velocity-native 1.1.0-SNAPSHOT
		fabric: Fabric API 0.46.1+1.18
		fabric-api-base: Fabric API Base 0.4.1+b4f4f6cd65
		fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.5.0+17be577f65
		fabric-biome-api-v1: Fabric Biome API (v1) 6.0.1+ded849a965
		fabric-command-api-v1: Fabric Command API (v1) 1.1.6+3ac43d9565
		fabric-commands-v0: Fabric Commands (v0) 0.2.5+b4f4f6cd65
		fabric-containers-v0: Fabric Containers (v0) 0.1.18+d154e2c665
		fabric-content-registries-v0: Fabric Content Registries (v0) 0.4.5+6f53a73d65
		fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.8+3ac43d9565
		fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.9+a1d9bbf565
		fabric-entity-events-v1: Fabric Entity Events (v1) 1.4.5+6b21378a65
		fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.16+bfa23f1765
		fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.6+b4f4f6cd65
		fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.10+3ac43d9565
		fabric-item-api-v1: Fabric Item API (v1) 1.3.0+691a79b565
		fabric-item-groups-v0: Fabric Item Groups (v0) 0.3.3+3ac43d9565
		fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.4.10+c15ca33565
		fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.8+3ac43d9565
		fabric-mining-level-api-v1: Fabric Mining Level API (v1) 1.0.3+3ac43d9565
		fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.8+b4f4f6cd65
		fabric-networking-api-v1: Fabric Networking API (v1) 1.0.18+3ac43d9565
		fabric-networking-v0: Fabric Networking (v0) 0.3.5+b4f4f6cd65
		fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.11.1+3b82842e65
		fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.9+3ac43d9565
		fabric-particles-v1: Fabric Particles (v1) 0.2.9+526dc1ac65
		fabric-permissions-api-v0: fabric-permissions-api 0.1-SNAPSHOT
		fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.9.0+befed49e65
		fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.4+7242e9d765
		fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.18+3ac43d9565
		fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 1.0.1+13eda06565
		fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.4.11+3ac43d9565
		fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.11+3ac43d9565
		fabric-structure-api-v1: Fabric Structure API (v1) 2.1.0+0a73a6c265
		fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.2.5+3ac43d9565
		fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.3.5+fb3b57b465
		fabric-transfer-api-v1: Fabric Transfer API (v1) 1.5.6+b4f4f6cd65
		fabricloader: Fabric Loader 0.12.12
		fdlink: Fabric <-> Discord Link 0.10.6
		fdlink_1_12_2: Fabric <-> Discord Link 0.10.6
		fdlink_1_15_2: Fabric <-> Discord Link 0.10.6
		fdlink_1_16: Fabric <-> Discord Link 0.10.6
		fdlink_1_6_4: Fabric <-> Discord Link 0.10.6
		fdlink_1_7_10: Fabric <-> Discord Link 0.10.6
		fdlink_1_8_9: Fabric <-> Discord Link 0.10.6
		fdlink_api: Fabric <-> Discord Link API 0.1.1
		fdlink_common: Fabric <-> Discord Link 0.10.6
		hologram-api: Hologram API 0.2.1+1.18-pre5
		java: OpenJDK 64-Bit Server VM 17
		krypton: Krypton 0.1.6
		lithium: Lithium 0.7.7
		minecraft: Minecraft 1.18.1
		net_dv8tion_jda: JDA 4.4.0_352
		net_sf_trove4j_trove4j: trove4j 3.0.3
		org_apache_commons_commons-collections4: commons-collections4 4.1
		org_json_json: json 20210307
		packet_tweaker: Packet Tweaker 0.2.0+1.18-pre1
		phosphor: Phosphor 0.8.1
		placeholder-api: Placeholder API 1.1.3+1.17.1
		polymer: Polymer (Core) 0.2.0-beta.21+1.18.1
		polymer-legacy: Polymer (Compatibility) 0.1.9+0.2.0-beta.21+1.18.1
		server_translations_api: Server Translations API 1.4.8+1.18-pre1
		servux: Servux 0.1.0
		sgui: sgui 1.0.0-rc6+1.18-pre5
		universal-graves: Universal Graves 2.0.0-rc.1+1.18.1
	Server Running: true