Crash with Smelting/Extracting

[Murdermancer]

Put sand in the extractor, and some planks to fuel it, and the game crashed.

Log:
`---- Minecraft Crash Report ----

WARNING: coremods are present:
CTMCorePlugin (CTM-MC1.12-0.2.3.12.jar)
ParagliderLoadingPlugin (Paraglider-1.12.2-1.0.1.4.jar)
LoadingPlugin (Reskillable-1.12.2-1.5.0.jar)
Contact their authors BEFORE contacting forge

// Uh... Did I do that?

Time: 5/19/18 11:13 PM
Description: Ticking block entity

java.lang.NullPointerException: Ticking block entity
at com.R3DKn16h7.kerncraft.tileentities.machines.ExtractorTileEntity.doneSmelting(ExtractorTileEntity.java:138)
at com.R3DKn16h7.kerncraft.tileentities.SmeltingTileEntity.progressSmelting(SmeltingTileEntity.java:201)
at com.R3DKn16h7.kerncraft.tileentities.SmeltingTileEntity.func_73660_a(SmeltingTileEntity.java:249)
at net.minecraft.world.World.func_72939_s(World.java:1832)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:612)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:765)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524)
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 com.R3DKn16h7.kerncraft.tileentities.machines.ExtractorTileEntity.doneSmelting(ExtractorTileEntity.java:138)
at com.R3DKn16h7.kerncraft.tileentities.SmeltingTileEntity.progressSmelting(SmeltingTileEntity.java:201)
at com.R3DKn16h7.kerncraft.tileentities.SmeltingTileEntity.func_73660_a(SmeltingTileEntity.java:249)

-- Block entity being ticked --
Details:
Name: kerncraft:extractor // com.R3DKn16h7.kerncraft.tileentities.machines.ExtractorTileEntity
Block type: ID #261 (tile.extractor // com.R3DKn16h7.kerncraft.tileentities.machines.ExtractorBlockEntity)
Block data value: 10 / 0xA / 0b1010
Block location: World: (-226,64,-44), Chunk: (at 14,4,4 in -15,-3; contains blocks -240,0,-48 to -225,255,-33), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Actual block type: ID #261 (tile.extractor // com.R3DKn16h7.kerncraft.tileentities.machines.ExtractorBlockEntity)
Actual block data value: 10 / 0xA / 0b1010
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1832)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:612)

-- Affected level --
Details:
Level name: New World
All players: 1 total; [EntityPlayerMP['ColdComfort'/410, l='New World', x=-225.88, y=64.00, z=-46.12]]
Chunk stats: ServerChunkCache: 670 Drop: 0
Level seed: -2075613162955451398
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (-228,64,-60), Chunk: (at 12,4,4 in -15,-4; contains blocks -240,0,-64 to -225,255,-49), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 19769 game time, 8020 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 78908 (now: false), thunder time: 32905 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:765)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 314098384 bytes (299 MB) / 1073741824 bytes (1024 MB) up to 1073741824 bytes (1024 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
FML: MCP 9.42 Powered by Forge 14.23.2.2611 32 mods loaded, 32 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

| State     | ID                | Version             | Source                                          | Signature                                |
|:--------- |:----------------- |:------------------- |:----------------------------------------------- |:---------------------------------------- |
| UCHIJAAAA | minecraft         | 1.12.2              | minecraft.jar                                   | None                                     |
| UCHIJAAAA | mcp               | 9.42                | minecraft.jar                                   | None                                     |
| UCHIJAAAA | FML               | 8.0.99.99           | forge-1.12.2-14.23.2.2611.jar                   | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| UCHIJAAAA | forge             | 14.23.2.2611        | forge-1.12.2-14.23.2.2611.jar                   | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| UCHIJAAAA | mercurius_updater | 1.0                 | MercuriusUpdater-1.12.2.jar                     | None                                     |
| UCHIJAAAA | adminshop         | 1.0                 | adminshop-1.1.jar                               | None                                     |
| UCHIJAAAA | aquatic           | 1.0.0-c             | Aquatic-1.12.2-1.0.0-c.jar                      | 7b14aaee2dd17b12a140baecab28948fff3a263f |
| UCHIJAAAA | bbs_mod           | ${version}          | bbs_mod-1.12.2-1.2.197.jar                      | None                                     |
| UCHIJAAAA | cameraobscura     | 0.0.1               | CameraObscura-1.0.3.jar                         | None                                     |
| UCHIJAAAA | crystals          | 1.0.2               | crystals-1.0.2.jar                              | None                                     |
| UCHIJAAAA | ctm               | MC1.12-0.2.3.12     | CTM-MC1.12-0.2.3.12.jar                         | None                                     |
| UCHIJAAAA | dwarven_candles   | 1.2                 | DwarvenCandles-[1.12]--1.2.jar                  | None                                     |
| UCHIJAAAA | mcjtylib_ng       | 2.6.7               | mcjtylib-1.12-2.6.7.jar                         | None                                     |
| UCHIJAAAA | efab              | 0.0.36              | efab-0.0.36.jar                                 | None                                     |
| UCHIJAAAA | picklelib         | 1.12.2-1.0.15.2     | picklelib-1.12.2-1.0.15.2.jar                   | None                                     |
| UCHIJAAAA | explosivefishing  | 1.12.2-1.0.4.0      | explosivefishing-1.12.2-1.0.4.0.jar             | None                                     |
| UCHIJAAAA | familiarfauna     | 1.0.10              | FamiliarFauna-1.12.2-1.0.10.jar                 | None                                     |
| UCHIJAAAA | gottschcore       | 1.3.5               | GottschCore-mc1.12-f14.21.1.2387-v1.3.5.jar     | None                                     |
| UCHIJAAAA | icbmclassic       | 1.12.2-3.0.0.29     | ICBM-classic-1.12.2-3.0.0b29.jar                | None                                     |
| UCHIJAAAA | jei               | 4.8.0.114           | jei_1.12.2-4.8.0.114.jar                        | None                                     |
| UCHIJAAAA | journeymap        | 1.12.2-5.5.2        | journeymap-1.12.2-5.5.2.jar                     | None                                     |
| UCHIJAAAA | kerncraft         | 1.0                 | KernCraft-0.0.1.jar                             | None                                     |
| UCHIJAAAA | lavadynamics      | 1.12.2-2.1.8        | lavadynamics-1.12.2-2.1.8.jar                   | None                                     |
| UCHIJAAAA | nomisma           | 0.1.1               | Nomisma-1.12.2-0.1.1.jar                        | None                                     |
| UCHIJAAAA | paraglider        | 1.0.1.4             | Paraglider-1.12.2-1.0.1.4.jar                   | None                                     |
| UCHIJAAAA | portality         | 1.0-SNAPSHOT        | portality-1.12.2-1.0.4-6.jar                    | None                                     |
| UCHIJAAAA | ptrmodellib       | 1.0.2               | PTRLib-1.0.2.jar                                | None                                     |
| UCHIJAAAA | reskillable       | 1.12.2-GRADLE:BUILD | Reskillable-1.12.2-1.5.0.jar                    | None                                     |
| UCHIJAAAA | star-tech         | 1.0.1               | star-tech-1.0.1.jar                             | None                                     |
| UCHIJAAAA | tetra             | 0.7.0               | tetra-1.12.2-0.7.1.jar                          | None                                     |
| UCHIJAAAA | todolist          | 1.0.2               | ToDoList-1.12.2-1.0.2.jar                       | None                                     |
| UCHIJAAAA | treasure2         | 0.5.3               | Treasure2-mc1.12.2-f14.23.1.2555-alpha0.5.3.jar | None                                     |

Loaded coremods (and transformers): 

CTMCorePlugin (CTM-MC1.12-0.2.3.12.jar)
team.chisel.ctm.client.asm.CTMTransformer
ParagliderLoadingPlugin (Paraglider-1.12.2-1.0.1.4.jar)
com.tictim.paraglider.asm.TransformerModelBiped
LoadingPlugin (Reskillable-1.12.2-1.5.0.jar)
codersafterdark.reskillable.base.asm.ClassTransformer
GL info: ERROR RuntimeException: No OpenGL context found in the current thread.
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [EntityPlayerMP['ColdComfort'/410, l='New World', x=-225.88, y=64.00, z=-46.12]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'`