I know it says Thaumcraft, but I only get this error when I updated Tainted Magic to the most current version (r7.8; happened on r7.7 too).

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 7/27/17 8:48 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at thaumcraft.api.wands.ItemFocusBasic.addFocusInformation(ItemFocusBasic.java:73)
at thaumcraft.api.wands.ItemFocusBasic.func_77624_a(ItemFocusBasic.java:58)
at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:525)
at thaumcraft.client.lib.REHWandHandler.renderFocusRadialHUD(REHWandHandler.java:303)
at thaumcraft.client.lib.REHWandHandler.handleFociRadial(REHWandHandler.java:140)
at thaumcraft.client.lib.RenderEventHandler.renderOverlay(RenderEventHandler.java:100)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_123_RenderEventHandler_renderOverlay_RenderGameOverlayEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraftforge.client.GuiIngameForge.renderHUDText(GuiIngameForge.java:699)
at net.minecraftforge.client.GuiIngameForge.func_73830_a(GuiIngameForge.java:155)
at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1362)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1001)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
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)

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

-- Head --
Stacktrace:
at thaumcraft.api.wands.ItemFocusBasic.addFocusInformation(ItemFocusBasic.java:73)
at thaumcraft.api.wands.ItemFocusBasic.func_77624_a(ItemFocusBasic.java:58)
at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:525)
at thaumcraft.client.lib.REHWandHandler.renderFocusRadialHUD(REHWandHandler.java:303)
at thaumcraft.client.lib.REHWandHandler.handleFociRadial(REHWandHandler.java:140)
at thaumcraft.client.lib.RenderEventHandler.renderOverlay(RenderEventHandler.java:100)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_123_RenderEventHandler_renderOverlay_RenderGameOverlayEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraftforge.client.GuiIngameForge.renderHUDText(GuiIngameForge.java:699)
at net.minecraftforge.client.GuiIngameForge.func_73830_a(GuiIngameForge.java:155)
at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1362)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['MinecraftUser'/360, l='MpServer', x=834.75, y=76.62, z=845.08]]
Chunk stats: MultiplayerChunkCache: 441, 450
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (31,64,-61), Chunk: (at 15,4,3 in 1,-4; contains blocks 16,0,-64 to 31,255,-49), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 12716682 game time, 766398 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: 56 total; [EntitySpider['Spider'/529, l='MpServer', x=860.91, y=27.00, z=814.03], EntitySkeleton['Skeleton'/530, l='MpServer', x=855.69, y=27.00, z=808.78], EntityBat['Bat'/531, l='MpServer', x=865.75, y=27.00, z=817.19], EntityZombie['Zombie'/536, l='MpServer', x=864.31, y=27.00, z=813.31], EntitySpider['Spider'/537, l='MpServer', x=862.59, y=27.00, z=815.09], EntityCreeper['Creeper'/538, l='MpServer', x=871.31, y=15.00, z=865.50], EntityBat['Bat'/539, l='MpServer', x=874.78, y=26.00, z=893.75], EntityBat['Bat'/542, l='MpServer', x=886.25, y=26.00, z=795.50], EntityCreeper['Creeper'/543, l='MpServer', x=882.30, y=16.39, z=867.70], EntityZombie['Zombie'/548, l='MpServer', x=907.03, y=12.00, z=822.44], EntityBat['Bat'/549, l='MpServer', x=907.56, y=23.00, z=836.53], EntitySkeleton['Skeleton'/550, l='MpServer', x=910.50, y=30.00, z=835.50], EntityZombie['Zombie'/551, l='MpServer', x=906.91, y=26.00, z=838.34], EntitySkeleton['Skeleton'/552, l='MpServer', x=909.47, y=30.00, z=879.09], EntityZombie['Zombie'/565, l='MpServer', x=913.50, y=26.00, z=855.50], EntityCreeper['Creeper'/569, l='MpServer', x=914.50, y=23.00, z=889.50], EntityClientPlayerMP['MinecraftUser'/360, l='MpServer', x=834.75, y=76.62, z=845.08], EntityBat['Bat'/424, l='MpServer', x=765.41, y=23.00, z=829.25], EntityBat['Bat'/425, l='MpServer', x=767.81, y=23.00, z=826.75], EntityMinecartChest['entity.MinecartChest.name'/426, l='MpServer', x=763.50, y=17.50, z=897.50], EntityCreeper['Creeper'/428, l='MpServer', x=756.50, y=21.00, z=924.50], EntityZombie['Zombie'/436, l='MpServer', x=783.50, y=16.00, z=773.50], EntityZombie['Zombie'/437, l='MpServer', x=768.41, y=29.00, z=830.91], EntityCreeper['Creeper'/438, l='MpServer', x=777.97, y=16.00, z=913.38], EntityZombie['Zombie'/451, l='MpServer', x=787.50, y=16.00, z=774.50], EntityZombie['Zombie'/452, l='MpServer', x=786.53, y=16.00, z=877.09], EntityCreeper['Creeper'/453, l='MpServer', x=790.50, y=17.00, z=872.09], EntitySpider['Spider'/454, l='MpServer', x=790.50, y=17.00, z=874.00], EntitySquid['Squid'/455, l='MpServer', x=795.22, y=52.38, z=900.03], EntitySkeleton['Skeleton'/461, l='MpServer', x=808.06, y=35.00, z=768.50], EntityDart['Golem Dart'/462, l='MpServer', x=812.50, y=63.06, z=806.00], EntityBat['Bat'/463, l='MpServer', x=812.63, y=27.10, z=836.75], EntityBat['Bat'/464, l='MpServer', x=802.63, y=33.10, z=837.13], EntityBat['Bat'/465, l='MpServer', x=802.53, y=33.10, z=837.81], EntityMinecartChest['entity.MinecartChest.name'/466, l='MpServer', x=804.50, y=16.34, z=910.50], EntityZombie['Zombie'/467, l='MpServer', x=801.97, y=12.00, z=917.59], EntitySkeleton['Skeleton'/468, l='MpServer', x=809.34, y=12.00, z=924.09], EntitySkeleton['Skeleton'/469, l='MpServer', x=806.88, y=18.00, z=914.53], EntityCreeper['Creeper'/478, l='MpServer', x=830.50, y=27.00, z=830.50], EntitySkeleton['Skeleton'/479, l='MpServer', x=822.22, y=27.00, z=830.50], EntitySelfShearingSheep['Self-Shearing Sheep'/480, l='MpServer', x=822.33, y=63.00, z=856.63], EntitySelfShearingSheep['Self-Shearing Sheep'/481, l='MpServer', x=823.55, y=63.00, z=855.50], EntitySelfShearingSheep['Self-Shearing Sheep'/482, l='MpServer', x=823.31, y=63.00, z=858.22], EntitySelfShearingSheep['Self-Shearing Sheep'/483, l='MpServer', x=821.92, y=63.00, z=855.45], EntitySquid['Squid'/484, l='MpServer', x=822.81, y=50.00, z=895.72], EntitySkeleton['Skeleton'/485, l='MpServer', x=827.94, y=17.00, z=903.56], EntityCreeper['Creeper'/492, l='MpServer', x=843.50, y=27.00, z=814.50], EntityDart['Golem Dart'/493, l='MpServer', x=847.78, y=66.38, z=811.00], EntityCreeper['Creeper'/494, l='MpServer', x=844.56, y=27.00, z=818.84], EntityCreeper['Creeper'/495, l='MpServer', x=846.75, y=27.00, z=817.31], EntityCreeper['Creeper'/496, l='MpServer', x=845.22, y=27.00, z=819.69], ThePrinceAdult['The Young Adult Prince'/497, l='MpServer', x=833.84, y=87.00, z=830.66], EntityCreeper['Creeper'/498, l='MpServer', x=844.00, y=19.00, z=882.44], EntityBat['Bat'/499, l='MpServer', x=842.66, y=16.00, z=905.28], EntitySkeleton['Skeleton'/500, l='MpServer', x=832.50, y=16.00, z=903.50], EntityZombie['Zombie'/501, l='MpServer', x=842.03, y=16.00, z=905.47]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2444)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:927)
at net.minecraft.client.main.Main.main(SourceFile:148)
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: 1.7.10
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: 656395840 bytes (625 MB) / 1407582208 bytes (1342 MB) up to 3207856128 bytes (3059 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1566 Optifine OptiFine_1.7.10_HD_U_D3 71 mods loaded, 71 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1566-1.7.10.jar)
UCHIJAAAA Forge{10.13.4.1566} [Minecraft Forge] (forge-1.7.10-10.13.4.1566-1.7.10.jar)
UCHIJAAAA appliedenergistics2-core{rv3-beta-5} [Applied Energistics 2 Core] (minecraft.jar)
UCHIJAAAA CodeChickenCore{1.0.7.47} [CodeChicken Core] (minecraft.jar)
UCHIJAAAA MobiusCore{1.2.5} [MobiusCore] (minecraft.jar)
UCHIJAAAA NotEnoughItems{1.0.5.118} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.118-universal.jar)
UCHIJAAAA ThE-core{0.10.0.0} [Thaumic Energistics Core] (minecraft.jar)
UCHIJAAAA ThaumicTinkerer-preloader{0.1} [Thaumic Tinkerer Core] (minecraft.jar)
UCHIJAAAA OpenModsCore{0.10} [OpenModsCore] (minecraft.jar)
UCHIJAAAA {000} [CoFH ASM] (minecraft.jar)
UCHIJAAAA FastCraft{1.23} [FastCraft] (fastcraft-1.23.jar)
UCHIJAAAA appliedenergistics2{rv3-beta-5} [Applied Energistics 2] (appliedenergistics2-rv3-beta-5.jar)
UCHIJAAAA CoFHCore{1.7.10R3.1.4} [CoFH Core] (CoFHCore-[1.7.10]3.1.4-329.jar)
UCHIJAAAA Baubles{1.0.1.10} [Baubles] (Baubles-1.7.10-1.0.1.10.jar)
UCHIJAAAA ThermalFoundation{1.7.10R1.2.6} [Thermal Foundation] (ThermalFoundation-[1.7.10]1.2.6-118.jar)
UCHIJAAAA ThermalExpansion{1.7.10R4.1.5} [Thermal Expansion] (ThermalExpansion-[1.7.10]4.1.5-248.jar)
UCHIJAAAA BigReactors{0.4.3A} [Big Reactors] (BigReactors-0.4.3A.jar)
UCHIJAAAA BiomesOPlenty{2.1.0} [Biomes O' Plenty] (BiomesOPlenty-1.7.10-2.1.0.1889-universal.jar)
UCHIJAAAA Thaumcraft{4.2.3.5} [Thaumcraft] (Thaumcraft-1.7.10-4.2.3.5.jar)
UCHIJAAAA Botania{r1.8-249} [Botania] (Botania r1.8-249.jar)
UCHIJAAAA BrandonsCore{1.0.0.12} [Brandon's Core] (BrandonsCore-1.0.0.12.jar)
UCHIJAAAA CarpentersBlocks{3.3.7} [Carpenter's Blocks] (Carpenter's Blocks v3.3.7 - MC 1.7.10.jar)
UCHIJAAAA ChickenChunks{1.3.4.19} [ChickenChunks] (ChickenChunks-1.7.10-1.3.4.19-universal.jar)
UCHIJAAAA ForgeMultipart{1.2.0.345} [Forge Multipart] (ForgeMultipart-1.7.10-1.2.0.345-universal.jar)
UCHIJAAAA chisel{2.9.5.11} [Chisel] (Chisel-2.9.5.11.jar)
UCHIJAAAA DraconicEvolution{1.0.2a} [Draconic Evolution] (Draconic-Evolution-1.7.10-1.0.2a.jar)
UCHIJAAAA DummyCore{1.13} [DummyCore] (DummyCore1.13.jar)
UCHIJAAAA endercore{1.7.10-0.2.0.32_beta} [EnderCore] (EnderCore-1.7.10-0.2.0.32_beta.jar)
UCHIJAAAA Waila{1.5.10} [Waila] (Waila-1.5.10_1.7.10.jar)
UCHIJAAAA EnderIO{1.7.10-2.3.0.424_beta} [Ender IO] (EnderIO-1.7.10-2.3.0.424_beta.jar)
UCHIJAAAA extracells{2.3.9} [Extra Cells 2] (ExtraCells-1.7.10-2.3.9b188.jar)
UCHIJAAAA ExtraUtilities{1.2.12} [Extra Utilities] (extrautilities-1.2.12.jar)
UCHIJAAAA ThaumicTinkerer{unspecified} [Thaumic Tinkerer] (ThaumicTinkerer-2.5-1.7.10-512.jar)
UCHIJAAAA ForbiddenMagic{1.7.10-0.574} [Forbidden Magic] (Forbidden Magic-1.7.10-0.574.jar)
UCHIJAAAA IronChest{6.0.62.742} [Iron Chest] (ironchest-1.7.10-6.0.62.742-universal.jar)
UCHIJAAAA journeymap{5.1.4} [JourneyMap] (journeymap-1.7.10-5.1.4-unlimited.jar)
UCHIJAAAA NEIAddons{1.12.14.40} [NEI Addons] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|Developer{1.12.14.40} [NEI Addons: Developer Tools] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|AppEng{1.12.14.40} [NEI Addons: Applied Energistics 2] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|Botany{1.12.14.40} [NEI Addons: Botany] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|Forestry{1.12.14.40} [NEI Addons: Forestry] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|CraftingTables{1.12.14.40} [NEI Addons: Crafting Tables] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|ExNihilo{1.12.14.40} [NEI Addons: Ex Nihilo] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA neiintegration{1.1.2} [NEI Integration] (NEIIntegration-MC1.7.10-1.1.2.jar)
UCHIJAAAA neresources{0.1.0.ManuallyBuilt} [Not Enough Resources] (NotEnoughResources-1.7.10-0.1.0-121.jar)
UCHIJAAAA OpenMods{0.10} [OpenMods] (OpenModsLib-1.7.10-0.10.jar)
UCHIJAAAA OpenBlocks{1.6} [OpenBlocks] (OpenBlocks-1.7.10-1.6.jar)
UCHIJAAAA OreSpawn{1.7.10.20.3} [OreSpawn] (orespawn-1.7.10-20.3.zip)
UCHIJAAAA MrTJPCoreMod{1.1.0.33} [MrTJPCore] (MrTJPCore-1.7.10-1.1.0.33-universal.jar)
UCHIJAAAA ProjRed|Core{4.7.0pre12.95} [ProjectRed Core] (ProjectRed-1.7.10-4.7.0pre12.95-Base.jar)
UCHIJAAAA ProjRed|Integration{4.7.0pre12.95} [ProjectRed Integration] (ProjectRed-1.7.10-4.7.0pre12.95-Integration.jar)
UCHIJAAAA ProjRed|Transmission{4.7.0pre12.95} [ProjectRed Transmission] (ProjectRed-1.7.10-4.7.0pre12.95-Integration.jar)
UCHIJAAAA TaintedMagic{r7.8} [Tainted Magic] (Tainted-Magic-r7.8.jar)
UCHIJAAAA tcinventoryscan{1.0.11} [TC Inventory Scanning] (tcinventoryscan-mc1.7.10-1.0.11.jar)
UCHIJAAAA thaumcraftneiplugin{@Version@} [Thaumcraft NEI Plugin] (thaumcraftneiplugin-1.7.10-1.7a.jar)
UCHIJAAAA thaumicbases{1.3.1710.2} [Thaumic Bases] (ThaumicBases-1.3.1710.4.jar)
UCHIJAAAA thaumicenergistics{1.0.0.1} [Thaumic Energistics] (thaumicenergistics-1.0.0.1.jar)
UCHIJAAAA ThaumicExploration{0.6.0} [Thaumic Exploration] (ThaumicExploration-1.7.10-1.1-53.jar)
UCHIJAAAA ThaumicHorizons{1.1.9} [Thaumic Horizons] (thaumichorizons-1.7.10-1.1.9.jar)
UCHIJAAAA ThermalDynamics{1.7.10R1.2.1} [Thermal Dynamics] (ThermalDynamics-[1.7.10]1.2.1-172.jar)
UCHIJAAAA WailaHarvestability{1.1.6} [Waila Harvestability] (WailaHarvestability-mc1.7.10-1.1.6.jar)
UCHIJAAAA wawla{1.3.3} [What Are We Looking At] (Wawla-1.3.3-1.7.10.jar)
UCHIJAAAA WR-CBE|Core{1.4.1.9} [WR-CBE Core] (WR-CBE-1.7.10-1.4.1.9-universal.jar)
UCHIJAAAA WR-CBE|Addons{1.4.1.9} [WR-CBE Addons] (WR-CBE-1.7.10-1.4.1.9-universal.jar)
UCHIJAAAA WR-CBE|Logic{1.4.1.9} [WR-CBE Logic] (WR-CBE-1.7.10-1.4.1.9-universal.jar)
UCHIJAAAA McMultipart{1.2.0.345} [Minecraft Multipart Plugin] (ForgeMultipart-1.7.10-1.2.0.345-universal.jar)
UCHIJAAAA ForgeRelocation{0.0.1.4} [ForgeRelocation] (ForgeRelocation-1.7.10-0.0.1.4-universal.jar)
UCHIJAAAA MCFrames{1.0} [MCFrames] (ForgeRelocation-1.7.10-0.0.1.4-universal.jar)
UCHIJAAAA RelocationFMP{0.0.1.2} [RelocationFMP] (ForgeRelocationFMP-1.7.10-0.0.1.2-universal.jar)
UCHIJAAAA ForgeMicroblock{1.2.0.345} [Forge Microblocks] (ForgeMultipart-1.7.10-1.2.0.345-universal.jar)
GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.5.0 NVIDIA 382.33' Renderer: 'GeForce GTX 770/PCIe/SSE2'
OpenModsLib class transformers: [stencil_patches:FINISHED],[movement_callback:FINISHED],[player_damage_hook:FINISHED],[map_gen_fix:FINISHED],[gl_capabilities_hook:FINISHED],[player_render_hook:FINISHED]
Class transformer null safety: all safe
AE2 Version: beta rv3-beta-5 for Forge 10.13.4.1448
CoFHCore: -[1.7.10]3.1.4-329
ThermalFoundation: -[1.7.10]1.2.6-118
ThermalExpansion: -[1.7.10]4.1.5-248
ThermalDynamics: -[1.7.10]1.2.1-172
Chisel: Errors like "[FML]: Unable to lookup ..." are NOT the cause of this crash. You can safely ignore these errors. And update forge while you're at it.
EnderIO: Found the following problem(s) with your installation:
* Optifine is installed. This is NOT supported.
* An unknown AE2 API is installed (rv3 from appliedenergistics2-rv3-beta-5.jar).
Ender IO was build against API version rv2 and may or may not work with a newer version.
This may have caused the error. Try reproducing the crash WITHOUT this/these mod(s) before reporting it.
Stencil buffer state: Function set: GL30, pool: forge, bits: 8
AE2 Integration: IC2:OFF, RotaryCraft:OFF, RC:OFF, BuildCraftCore:OFF, BuildCraftTransport:OFF, BuildCraftBuilder:OFF, RF:ON, RFItem:ON, MFR:OFF, DSU:ON, FZ:OFF, FMP:ON, RB:OFF, CLApi:OFF, Waila:ON, InvTweaks:OFF, NEI:ON, CraftGuide:OFF, Mekanism:OFF, ImmibisMicroblocks:OFF, BetterStorage:OFF, OpenComputers:OFF, PneumaticCraft:OFF
Launched Version: 1.7.10-Forge10.13.4.1566-1.7.10
LWJGL: 2.9.1
OpenGL: GeForce GTX 770/PCIe/SSE2 GL version 4.5.0 NVIDIA 382.33, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: [HEE Music v1.0.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)
OptiFine Version: OptiFine_1.7.10_HD_U_D3
Render Distance Chunks: 16
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
OpenGlVersion: 4.5.0 NVIDIA 382.33
OpenGlRenderer: GeForce GTX 770/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 4

What focus were you trying to equip? Also please put crash reports in a gist or a text file.

I apologize, I'm new to using Github, but thank you for telling me. I could provide a list of all the wand foci I have, but I recently discovered something that I had missed before: upon opening my bottomless pouch (Thaumic Tinkerer), I noticed that when switching from r7.6 to r7.8, while the Dark Matter and Tainted Shockwave foci were removed, the Vis Shard and Tainted Storm foci were not, and were, for some reason, changed to 'Unnamed.' After deleting those and replacing them, everything's working fine. I apologize for not realizing this sooner, but could this possibly be a bug?

Okay, please refer to #48
I believe this is caused by the change of item ID for the Tainted Shockwave and the Dark Matter foci... they were the only two whose IDs were changed and coincidentally the two that were 'unnamed'. I think this is just the way Thaumcraft handles foci and their corresponding item IDs. I'm going to close this issue since #48 seems to be the same problem.