So, one of our users broke an unlit torch while it was raining. The torch was hanging from a clay block if that helps.

[23:25:31] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.util.ReportedException: Ticking block entity
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:707) ~[MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344) ~[ko.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605) ~[MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
Caused by: java.lang.IllegalArgumentException: Cannot get property PropertyDirection{name=facing, clazz=class net.minecraft.util.EnumFacing, values=[up, north, south, west, east]} as it does not exist in BlockState{block=minecraft:air, properties=[]}
at net.minecraft.block.state.BlockState$StateImplementation.func_177229_b(BlockState.java:137) ~[ama$a.class:?]
at net.minecraft.block.BlockTorch.func_176201_c(BlockTorch.java:256) ~[akf.class:?]
at com.chaosthedude.realistictorches.blocks.te.TETorch.func_73660_a(TETorch.java:22) ~[TETorch.class:?]
at net.minecraft.world.World.func_72939_s(World.java:1716) ~[adm.class:?]
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:544) ~[le.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:701) ~[MinecraftServer.class:?]
... 4 more

What Minecraft version was this, and what version of Realistic Torches?

If you have a full crash report from this, post that; it will have all the information I need.

As you wish:

, [03.05.16 15:48]
A detailed walkthrough of the error, its code path and all known details is as follows:
—-------------------------------------------------------------------------------------

— Head —
Stacktrace:
at net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:415)
at net.minecraft.inventory.SlotCrafting.func_75208_c(SlotCrafting.java:52)
at net.minecraft.inventory.SlotCrafting.func_75210_a(SlotCrafting.java:45)
at net.minecraft.inventory.Slot.func_75220_a(Slot.java:34)
at net.minecraft.inventory.ContainerWorkbench.func_82846_b(SourceFile:96)
at net.minecraft.inventory.Container.func_75144_a(Container.java:246)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:488)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(GuiContainer.java:629)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:388)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:554)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:523)

— Affected screen —
Details:
Screen name: net.minecraft.client.gui.inventory.GuiCrafting

— Affected level —
Details:
Level name: MpServer
All players: 2 total; [EntityPlayerSP['Sirukal'/127125, l='MpServer', x=976,43, y=63,50, z=1115,00], EntityOtherPlayerMP['Anaeijon'/179043, l='MpServer', x=1056,09, y=64,00, z=1163,69]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 439,00,66,00,302,00 - World: (439,66,302), Chunk: (at 7,4,14 in 27,18; contains blocks 432,0,288 to 447,255,303), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 3472219 game time, 3852138 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 31 total; [EntityPlayerSP['Sirukal'/127125, l='MpServer', x=976,43, y=63,50, z=1115,00], EntitySheep['Sheep'/126481, l='MpServer', x=960,38, y=63,00, z=1177,09], EntitySheep['Sheep'/126480, l='MpServer', x=966,75, y=63,00, z=1178,09], EntityBat['Bat'/181790, l='MpServer', x=1034,65, y=36,38, z=1175,46], EntityOtherPlayerMP['Anaeijon'/91239, l='MpServer', x=1049,84, y=63,00, z=1172,13], EntityBat['Bat'/175140, l='MpServer', x=950,56, y=49,10, z=1121,59], EntityBat['Bat'/182071, l='MpServer', x=1038,50, y=37,75, z=1175,53], EntitySquid['Squid'/181815, l='MpServer', x=940,28, y=62,13, z=1154,03], EntityBat['Bat'/181064, l='MpServer', x=1039,16, y=31,54, z=1168,17], EntitySquid['Squid'/178766, l='MpServer', x=936,50, y=62,19, z=1095,16], EntityOtherPlayerMP['Anaeijon'/179043, l='MpServer', x=1056,09, y=64,00, z=1163,69], EntityBat['Bat'/182134, l='MpServer', x=943,50, y=13,03, z=1087,13], EntitySquid['Squid'/182142, l='MpServer', x=987,59, y=62,10, z=1139,97], EntityBoat['Boat'/119678, l='MpServer', x=1033,91, y=62,90, z=1168,75], EntityOtherPlayerMP['Anaeijon'/179043, l='MpServer', x=1056,09, y=64,00, z=1163,69], EntityBat['Bat'/181903, l='MpServer', x=1035,45, y=20,18, z=1063,44], EntityBat['Bat'/182416, l='MpServer', x=949,23, y=11,11, z=1086,46], EntityCow['Cow'/127129, l='MpServer', x=899,91, y=63,00, z=1137,00], EntityCow['Cow'/127131, l='MpServer', x=901,44, y=65,00, z=1152,63], EntityMinecartChest['container.minecart'/127134, l='MpServer', x=911,50, y=16,06, z=1066,50], EntityBat['Bat'/182180, l='MpServer', x=944,75, y=14,10, z=1072,25], EntityBat['Bat'/182443, l='MpServer', x=911,13, y=17,10, z=1063,75], EntityBat['Bat'/182196, l='MpServer', x=970,69, y=11,00, z=1069,38], EntitySquid['Squid'/180678, l='MpServer', x=1012,53, y=61,97, z=1142,94], EntitySquid['Squid'/180676, l='MpServer', x=1015,50, y=59,00, z=1144,47], EntitySquid['Squid'/180683, l='MpServer', x=1019,53, y=60,72, z=1156,06], EntityCow['Cow'/126924, l='MpServer', x=917,06, y=63,00, z=1149,97], EntityBat['Bat'/181217, l='MpServer', x=1031,50, y=49,94,
, [03.05.16 15:48]
z=1195,84], EntityBat['Bat'/182762, l='MpServer', x=908,25, y=22,99, z=1191,89], EntitySheep['Sheep'/126457, l='MpServer', x=968,31, y=65,00, z=1192,44], EntitySheep['Sheep'/126456, l='MpServer', x=963,44, y=65,00, z=1190,63]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:404)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2536)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:370)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

— System Details —
Details:
Minecraft Version: 1.8.9
Operating System: Windows 10 (amd64) version 10.0
CPU: 4x AMD A10-6700 APU with Radeon(tm) HD Graphics
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 115512840 bytes (110 MB) / 784572416 bytes (748 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 97
FML: MCP 9.19 Powered by Forge 11.15.1.1722 Optifine OptiFine_1.8.9_HD_U_H5 24 mods loaded, 24 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJA mcp{9.19} Minecraft Coder Pack
UCHIJA FML{8.0.99.99} Forge Mod Loader
UCHIJA Forge{11.15.1.1722} Minecraft Forge
UCHIJA additionalbanners{1.1.1} Additional Banners
UCHIJA AppleCore{1.3.0} AppleCore
UCHIJA AutoSapling{1.0} [Auto Sapling](AutoSapling 1.2 MC1.8.9.jar)
UCHIJA BaMsGRAVE{2.0.1} BaM's Grave
UCHIJA BetterHorseHud{1.0} Better Horse Hud
UCHIJA Bloodmoon{1.2} Bloodmoon
UCHIJA cfm{3.6.2} MrCrayfish's Furniture Mod
UCHIJA ModName{1.0.0} ModName
UCHIJA EnderZoo{1.8.9-1.1.3.35} Ender Zoo
UCHIJA haggismod{1.4.2} AWH Haggis Mod!
UCHIJA highlands{1.8.9} Highlands
UCHIJA hopperducts{1.4.6} Hopper Ducts
UCHIJA inventorytweaks{1.60-40-e06e29a} Inventory Tweaks
UCHIJA RealisticTorches{1.5.4} Realistic Torches
UCHIJA redstonepaste{1.7.2} Redstone Paste
UCHIJA reforged_cag{1.0} Reforged - Cross & Grave
UCHIJA SaltMod{1.8.b} Salty Mod
UCHIJA SpiceOfLife{1.3.1} The Spice of Life
UCHIJA VeinMiner{0.31.4_build.unknown} Vein Miner
UCHIJA VeinMinerModSupport{0.31.4_build.unknown} Mod Support
UCHIJA XaeroMinimap{1.8.7} Xaero's Minimap
Loaded coremods (and transformers):
NowWithRendering (hopperducts-mc1.8.8-1.4.6.jar)
net.fybertech.nwr.NowWithRendering
LoadingPlugin (Bloodmoon-MC1.8.8-1.4.jar)
lumien.bloodmoon.asm.ClassTransformer
FMLPlugin (InventoryTweaks-1.60-40.jar)

, [03.05.16 15:48]
invtweaks.forge.asm.ContainerTransformer
AppleCore (AppleCore-mc1.8.9-1.3.0.jar)
squeek.applecore.asm.TransformerModuleHandler
NowWithRendering (redstonepaste-mc1.8.8-1.7.2.jar)
net.fybertech.nwr.NowWithRendering
GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.5.13399 Compatibility Profile Context 15.201.1151.1008' Renderer: 'AMD Radeon HD 8670D'
Launched Version: 1.8.9-forge1.8.9-11.15.1.1722
LWJGL: 2.9.4
OpenGL: AMD Radeon HD 8670D GL version 4.5.13399 Compatibility Profile Context 15.201.1151.1008, ATI Technologies Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (UK)
Profiler Position: N/A (disabled)
CPU: 4x AMD A10-6700 APU with Radeon(tm) HD Graphics
OptiFine Version: OptiFine_1.8.9_HD_U_H5
Render Distance Chunks: 16
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.5.13399 Compatibility Profile Context 15.201.1151.1008
OpenGlRenderer: AMD Radeon HD 8670D
OpenGlVendor: ATI Technologies Inc.
CpuCount: 4

Sorry about the delay. This should be fixed in version 1.5.6.