mojira.dev
MC-305539

Game crashes when trying to initiate

Resolved
Duplicate
0

Launcher error:

The game crashed: initializing game
Error: java.lang.IllegalStateException: Duplicate key JSON["minecraft:looking_at_block_state"] (attempted merging values JSON["never"] and JSON["inOverlay"])

Crash Report:

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

Time: 2026-01-07 22:41:14
Description: Initializing game

java.lang.IllegalStateException: Duplicate key JSON["minecraft:looking_at_block_state"] (attempted merging values JSON["never"] and JSON["inOverlay"])
at java.base/java.util.stream.Collectors.duplicateKeyException(Collectors.java:135)
at java.base/java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$0(Collectors.java:182)
at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:723)
at com.mojang.serialization.Dynamic.lambda$updateMapValues$5(Dynamic.java:76)
at com.mojang.serialization.DataResult$Success.map(DataResult.java:175)
at com.mojang.serialization.Dynamic.updateMapValues(Dynamic.java:73)
at net.minecraft.util.datafix.fixes.DebugProfileLookingAtSplitFix.lambda$makeRule$2(DebugProfileLookingAtSplitFix.java:18)
at com.mojang.serialization.Dynamic.lambda$update$14(Dynamic.java:147)
at com.mojang.serialization.DynamicOps.lambda$update$27(DynamicOps.java:221)
at com.mojang.serialization.DataResult$Success.map(DataResult.java:175)
at com.mojang.serialization.DynamicOps.update(DynamicOps.java:221)
at com.mojang.serialization.Dynamic.lambda$update$15(Dynamic.java:147)
at com.mojang.serialization.Dynamic.map(Dynamic.java:39)
at com.mojang.serialization.Dynamic.update(Dynamic.java:147)
at net.minecraft.util.datafix.fixes.DebugProfileLookingAtSplitFix.lambda$makeRule$1(DebugProfileLookingAtSplitFix.java:17)
at com.mojang.datafixers.Typed.lambda$updateCap$9(Typed.java:164)
at com.mojang.datafixers.optics.Traversal$Instance$1.lambda$wander$0(Traversal.java:34)
at com.mojang.datafixers.util.Pair$Instance.traverse(Pair.java:90)
at com.mojang.datafixers.optics.profunctors.TraversalP$1.lambda$wander$0(TraversalP.java:50)
at com.mojang.datafixers.optics.Traversal$Instance$1.lambda$wander$0(Traversal.java:34)
at com.mojang.datafixers.optics.Traversal$Instance$1.lambda$wander$0(Traversal.java:34)
at com.mojang.datafixers.Typed.updateCap(Typed.java:164)
at com.mojang.datafixers.Typed.update(Typed.java:138)
at com.mojang.datafixers.Typed.update(Typed.java:133)
at net.minecraft.util.datafix.fixes.DebugProfileLookingAtSplitFix.lambda$makeRule$0(DebugProfileLookingAtSplitFix.java:16)
at com.mojang.datafixers.DataFix.lambda$checked$3(DataFix.java:98)
at com.mojang.datafixers.types.Type.capWrite(Type.java:167)
at com.mojang.datafixers.types.Type.lambda$readAndWrite$10(Type.java:159)
at com.mojang.serialization.DataResult$Success.flatMap(DataResult.java:201)
at com.mojang.datafixers.types.Type.readAndWrite(Type.java:158)
at com.mojang.datafixers.DataFixerUpper.update(DataFixerUpper.java:78)
at net.minecraft.util.datafix.DataFixTypes.update(DataFixTypes.java:79)
at net.minecraft.util.datafix.DataFixTypes.updateToCurrentVersion(DataFixTypes.java:83)
at net.minecraft.util.datafix.DataFixTypes$1.decode(DataFixTypes.java:72)
at com.mojang.serialization.Decoder.decode(Decoder.java:22)
at com.mojang.serialization.Decoder.parse(Decoder.java:26)
at net.minecraft.client.gui.components.debug.DebugScreenEntryList.load(DebugScreenEntryList.java:55)
at net.minecraft.client.gui.components.debug.DebugScreenEntryList.<init>(DebugScreenEntryList.java:44)
at net.minecraft.client.Minecraft.<init>(Minecraft.java:478)
at net.minecraft.client.main.Main.main(Main.java:232)

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

-- Head --
Thread: Render thread
Stacktrace:
at java.base/java.util.stream.Collectors.duplicateKeyException(Collectors.java:135)
at java.base/java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$0(Collectors.java:182)
at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:723)
at com.mojang.serialization.Dynamic.lambda$updateMapValues$5(Dynamic.java:76)
at com.mojang.serialization.DataResult$Success.map(DataResult.java:175)
at com.mojang.serialization.Dynamic.updateMapValues(Dynamic.java:73)
at net.minecraft.util.datafix.fixes.DebugProfileLookingAtSplitFix.lambda$makeRule$2(DebugProfileLookingAtSplitFix.java:18)
at com.mojang.serialization.Dynamic.lambda$update$14(Dynamic.java:147)
at com.mojang.serialization.DynamicOps.lambda$update$27(DynamicOps.java:221)
at com.mojang.serialization.DataResult$Success.map(DataResult.java:175)
at com.mojang.serialization.DynamicOps.update(DynamicOps.java:221)
at com.mojang.serialization.Dynamic.lambda$update$15(Dynamic.java:147)
at com.mojang.serialization.Dynamic.map(Dynamic.java:39)
at com.mojang.serialization.Dynamic.update(Dynamic.java:147)
at net.minecraft.util.datafix.fixes.DebugProfileLookingAtSplitFix.lambda$makeRule$1(DebugProfileLookingAtSplitFix.java:17)
at com.mojang.datafixers.Typed.lambda$updateCap$9(Typed.java:164)
at com.mojang.datafixers.optics.Traversal$Instance$1.lambda$wander$0(Traversal.java:34)
at com.mojang.datafixers.util.Pair$Instance.traverse(Pair.java:90)
at com.mojang.datafixers.optics.profunctors.TraversalP$1.lambda$wander$0(TraversalP.java:50)
at com.mojang.datafixers.optics.Traversal$Instance$1.lambda$wander$0(Traversal.java:34)
at com.mojang.datafixers.optics.Traversal$Instance$1.lambda$wander$0(Traversal.java:34)
at com.mojang.datafixers.Typed.updateCap(Typed.java:164)
at com.mojang.datafixers.Typed.update(Typed.java:138)
at com.mojang.datafixers.Typed.update(Typed.java:133)
at net.minecraft.util.datafix.fixes.DebugProfileLookingAtSplitFix.lambda$makeRule$0(DebugProfileLookingAtSplitFix.java:16)
at com.mojang.datafixers.DataFix.lambda$checked$3(DataFix.java:98)
at com.mojang.datafixers.types.Type.capWrite(Type.java:167)
at com.mojang.datafixers.types.Type.lambda$readAndWrite$10(Type.java:159)
at com.mojang.serialization.DataResult$Success.flatMap(DataResult.java:201)
at com.mojang.datafixers.types.Type.readAndWrite(Type.java:158)
at com.mojang.datafixers.DataFixerUpper.update(DataFixerUpper.java:78)
at net.minecraft.util.datafix.DataFixTypes.update(DataFixTypes.java:79)
at net.minecraft.util.datafix.DataFixTypes.updateToCurrentVersion(DataFixTypes.java:83)
at net.minecraft.util.datafix.DataFixTypes$1.decode(DataFixTypes.java:72)
at com.mojang.serialization.Decoder.decode(Decoder.java:22)
at com.mojang.serialization.Decoder.parse(Decoder.java:26)
at net.minecraft.client.gui.components.debug.DebugScreenEntryList.load(DebugScreenEntryList.java:55)
at net.minecraft.client.gui.components.debug.DebugScreenEntryList.<init>(DebugScreenEntryList.java:44)
at net.minecraft.client.Minecraft.<init>(Minecraft.java:478)

-- Initialization --
Details:
Modules:
ADVAPI32.dll:API de base do Windows 32 avançada:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
COMCTL32.dll:Biblioteca de Controles de Experiência do Usuário:6.10 (WinBuild.160101.0800):Microsoft Corporation
CRYPT32.dll:Crypto API32:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
CRYPTBASE.dll:Base cryptographic API DLL:10.0.26100.7019 (WinBuild.160101.0800):Microsoft Corporation
CRYPTSP.dll:Cryptographic Service Provider API:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
DBGHELP.DLL:Windows Image Helper:10.0.26100.5074 (WinBuild.160101.0800):Microsoft Corporation
DNSAPI.dll:DLL da API de cliente DNS:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
GDI32.dll:GDI Client DLL:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
IMM32.DLL:Multi-User Windows IMM32 API Client DLL:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
IPHLPAPI.DLL:API de Auxiliar de IP:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
KERNEL32.DLL:DLL cliente da API BASE do Windows NT:10.0.26100.7306 (WinBuild.160101.0800):Microsoft Corporation
KERNELBASE.dll:DLL cliente da API BASE do Windows NT:10.0.26100.7306 (WinBuild.160101.0800):Microsoft Corporation
MpOav.dll:IOfficeAntiVirus Module:4.18.25110.6 (747f30181b4cd739116f0a6ad3cabef997251d7f):Microsoft Corporation
NSI.dll:NSI User-mode interface DLL:10.0.26100.7019 (WinBuild.160101.0800):Microsoft Corporation
NTASN1.dll:Microsoft ASN.1 API:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
OLEAUT32.dll:OLEAUT32.DLL:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
POWRPROF.dll:DLL do Auxiliar do Perfil de Energia:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
PSAPI.DLL:Process Status Helper:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
Pdh.dll:DLL auxiliar de dados de desempenho do Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
RPCRT4.dll:Tempo de Execução da Chamada de Procedimento Remoto:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
SHCORE.dll:SHCORE:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
SHELL32.dll:DLL comum do Shell do Windows:10.0.26100.7306 (WinBuild.160101.0800):Microsoft Corporation
UMPDC.dll:User Mode Power Dependency Coordinator:10.0.26100.7019 (WinBuild.160101.0800):Microsoft Corporation
USER32.dll:DLL de cliente API de usuário Windows para multiusuários:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
USERENV.dll:Userenv:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
VCRUNTIME140.dll:Microsoft® C Runtime Library:14.44.35208.0:Microsoft Corporation
VERSION.dll:Version Checking and File Installation Libraries:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
WINMM.dll:MCI API DLL:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
WS2_32.dll:DLL de 32 bits do Windows Socket 2.0:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
amsi.dll:Anti-Malware Scan Interface:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
bcrypt.dll:Biblioteca de Primitivos Criptografados do Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
bcryptPrimitives.dll:Windows Cryptographic Primitives Library:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
clbcatq.dll:COM+ Configuration Catalog:2001.12.10941.16384 (WinBuild.160101.0800):Microsoft Corporation
combase.dll:Microsoft COM para Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
dbgcore.DLL:Windows Core Debugging Helpers:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
extnet.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
fwpuclnt.dll:API de Modo de Usuário FWP/IPsec:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
gdi32full.dll:GDI Client DLL:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
glfw.dll:GLFW 3.4.0 DLL:3.4.0:GLFW
java.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
javaw.exe:OpenJDK Platform binary:25.0.1.0:Microsoft
jimage.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
jli.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
jna8670377976756548469.dll:JNA native library:7.0.2:Java(TM) Native Access (JNA)
jvm.dll:OpenJDK 64-Bit server VM:25.0.1.0:Microsoft
kernel.appcore.dll:AppModel API Host:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
lwjgl.dll
management.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
management_ext.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
msvcp140.dll:Microsoft® C Runtime Library:14.44.35208.0:Microsoft Corporation
msvcp_win.dll:Microsoft® C Runtime Library:10.0.26100.7019 (WinBuild.160101.0800):Microsoft Corporation
msvcrt.dll:Windows NT CRT DLL:7.0.26100.7019 (WinBuild.160101.0800):Microsoft Corporation
mswsock.dll:Provedor de serviços do Microsoft Windows Sockets 2.0:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
napinsp.dll:Provedor de Correção de Nomeação de Emails:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
ncrypt.dll:Roteador NCrypt do Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
net.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
nio.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
nlansp_c.dll:NLA Namespace Service Provider DLL:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
ntdll.dll:DLL de nível do NT:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
ole32.dll:Microsoft OLE para Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
perfos.dll:DLL de objetos de desempenho de sistema do Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
pfclient.dll:SysMain Client:10.0.26100.4202 (WinBuild.160101.0800):Microsoft Corporation
profapi.dll:User Profile Basic API:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
rasadhlp.dll:Remote Access AutoDial Helper:10.0.26100.7171 (WinBuild.160101.0800):Microsoft Corporation
rsaenh.dll:Microsoft Enhanced Cryptographic Provider:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
sechost.dll:Host for SCM/SDDL/LSA Lookup APIs:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
shlwapi.dll:Biblioteca de utilitário abreviado para Shell:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
sunmscapi.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
ucrtbase.dll:Microsoft® C Runtime Library:10.0.26100.7019 (WinBuild.160101.0800):Microsoft Corporation
vcruntime140_1.dll:Microsoft® C Runtime Library:14.44.35208.0:Microsoft Corporation
verify.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
win32u.dll:Win32u:10.0.26100.7309 (WinBuild.160101.0800):Microsoft Corporation
windows.storage.dll:API de Armazenamento Microsoft WinRT:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
winrnr.dll:LDAP RnR Provider DLL:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
wintypes.dll:DLL dos Tipos de Base do Windows:10.0.26100.7689 (WinBuild.160101.0800):Microsoft Corporation
wshbth.dll:Windows Sockets Helper DLL:10.0.26100.5074 (WinBuild.160101.0800):Microsoft Corporation
zip.dll:OpenJDK Platform binary:25.0.1.0:Microsoft
Stacktrace:
at net.minecraft.client.main.Main.main(Main.java:232)

-- System Details --
Details:
Minecraft Version: 26.1 Snapshot 2
Minecraft Version ID: 26.1-snapshot-2
Operating System: Windows 11 (amd64) version 10.0
Java Version: 25.0.1, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 185024504 bytes (176 MiB) / 536870912 bytes (512 MiB) up to 4294967296 bytes (4096 MiB)
CPUs: 8
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM) i5-8365U CPU @ 1.60GHz
Identifier: Intel64 Family 6 Model 142 Stepping 12
Microarchitecture: Whiskey Lake
Frequency (GHz): 1.90
Number of physical packages: 1
Number of physical CPUs: 4
Number of logical CPUs: 8
Graphics card #0 name: Intel(R) UHD Graphics 620
Graphics card #0 vendor: Intel Corporation
Graphics card #0 VRAM (MiB): 1024.00
Graphics card #0 deviceId: VideoController1
Graphics card #0 versionInfo: 31.0.101.2135
Memory slot #0 capacity (MiB): 16384.00
Memory slot #0 clockSpeed (GHz): 2.40
Memory slot #0 type: DDR4
Virtual memory max (MiB): 17215.23
Virtual memory used (MiB): 6350.28
Swap memory total (MiB): 1024.00
Swap memory used (MiB): 50.95
Space in storage for jna.tmpdir (MiB): available: 93233.16, total: 243121.00
Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 93233.16, total: 243121.00
Space in storage for io.netty.native.workdir (MiB): available: 93233.16, total: 243121.00
Space in storage for java.io.tmpdir (MiB): available: 93233.16, total: 243121.00
Space in storage for workdir (MiB): available: 93233.16, total: 243121.00
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Debug Flags: 0 total;
Launched Version: 26.1-snapshot-2
Launcher name: minecraft-launcher
Backend library: LWJGL version 3.3.3+5
Backend API: Unknown
Window size: <not initialized>
GFLW Platform: <error>
Render Extensions: ERR
GL debug messages: <no renderer available>
Is Modded: Probably not. Client jar signature and brand is untouched
Universe: 404
Type: Client
Locale: pt_BR
System encoding: Cp1252
File encoding: UTF-8
CPU: 8x Intel(R) Core(TM) i5-8365U CPU @ 1.60GHz

Comments 1

Hi!
Thank you for your report! 

We're already tracking this issue at MC-305491 , so I will resolve and link this ticket as a Duplicate. 

I suggest also to browse through the main issue for potential fixes. 

If you would like to add a vote and any extra information to the main ticket it would be appreciated. 

Quick Links: 
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki

Maximus_3069

(Unassigned)

Unconfirmed

(Unassigned)

26.1 Snapshot 2

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