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  1. Minecraft: Java Edition
  2. MC-135136

Crash when placing a chain command block with set command

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    Details

    • Confirmation Status:
      Confirmed

      Description

      The bug

      Placing a chain command block with NBT will crash the game.

      Steps to reproduce

      1. Place a repeating command block and set it to "Always Active"
      2. Place the following chain command block in front of the repeating command block
        /give @s chain_command_block{BlockEntityTag:{Command:"say crash"}}
        

        → The game will crash

      Crash

      ---- Minecraft Crash Report ----
      // Oh - I know what I did wrong!
      
      Time: 7/28/18 6:36 PM
      Description: Exception while ticking
      
      java.lang.NullPointerException: Exception while ticking
      	at bjc.w(SourceFile:119)
      	at bjg.j(SourceFile:122)
      	at bdg.a(SourceFile:229)
      	at bdg.a(SourceFile:120)
      	at bdg.a(SourceFile:93)
      	at bkw.a(SourceFile:261)
      	at tc.b(SourceFile:565)
      	at tc$$Lambda$1531/492925641.accept(Unknown Source)
      	at ayi.a(SourceFile:79)
      	at tc.q_(SourceFile:551)
      	at tc.a(SourceFile:215)
      	at net.minecraft.server.MinecraftServer.b(SourceFile:728)
      	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
      	at dga.a(SourceFile:159)
      	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
      	at java.lang.Thread.run(Thread.java:745)
      
      
      A detailed walkthrough of the error, its code path and all known details is as follows:
      ---------------------------------------------------------------------------------------
      
      -- Head --
      Thread: Server thread
      Stacktrace:
      	at bjc.w(SourceFile:119)
      	at bjg.j(SourceFile:122)
      	at bdg.a(SourceFile:229)
      	at bdg.a(SourceFile:120)
      	at bdg.a(SourceFile:93)
      	at bkw.a(SourceFile:261)
      	at tc.b(SourceFile:565)
      	at tc$$Lambda$1531/492925641.accept(Unknown Source)
      
      -- Block being ticked --
      Details:
      	Block location: World: (62,1,-26), Chunk: (at 14,0,6 in 3,-2; contains blocks 48,0,-32 to 63,255,-17), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
      Stacktrace:
      	at ayi.a(SourceFile:79)
      	at tc.q_(SourceFile:551)
      	at tc.a(SourceFile:215)
      
      -- Affected level --
      Details:
      	Level name: Redstone
      	All players: 1 total; [te[''/33, l='Redstone', x=59.51, y=1.00, z=-24.79]]
      	Chunk stats: ServerChunkCache: 458 Drop: 0
      	Level seed: 4882365540653810169
      	Level generator: ID 01 - flat, ver 0. Features enabled: true
      	Level generator options: {biome:"minecraft:the_void",layers:[{block:"minecraft:barrier",height:1}],structures:{decoration:{}}}
      	Level spawn location: World: (8,4,8), Chunk: (at 8,0,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
      	Level time: 13660797 game time, 6000 day time
      	Level dimension: 0
      	Level storage version: 0x04ABD - Anvil
      	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
      	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
      Stacktrace:
      	at net.minecraft.server.MinecraftServer.b(SourceFile:728)
      	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
      	at dga.a(SourceFile:159)
      	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
      	at java.lang.Thread.run(Thread.java:745)
      
      -- System Details --
      Details:
      	Minecraft Version: 18w30b
      	Operating System: Windows 10 (amd64) version 10.0
      	Java Version: 1.8.0_51, Oracle Corporation
      	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
      	Memory: 187640088 bytes (178 MB) / 498393088 bytes (475 MB) up to 1060372480 bytes (1011 MB)
      	JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
      	Profiler Position: N/A (disabled)
      	Player Count: 1 / 8; [te[''/33, l='Redstone', x=59.51, y=1.00, z=-24.79]]
      	Data Packs: vanilla
      	Type: Integrated Server (map_client.txt)
      	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
      

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              • Assignee:
                fry [Mojang] Georgii Gavrichev
                Reporter:
                VladStepu2001 Vladislav
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved:
                  CHK: