Adding enchants to items via anvil and naming said items at the same time causes crash

When I tried to add an enchanted book to an item and name said item at the SAME time, the game crashed, Full details in the following giphy link and full crash report

http://giphy.com/gifs/26uf7TsUiC6yKO7KM

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

Time: 09/09/16 20:54
Description: Updating screen events

java.lang.NullPointerException: Updating screen events
	at aer.s(SourceFile:537)
	at abx.a(SourceFile:442)
	at bhf.a(SourceFile:119)
	at bhf.a(SourceFile:103)
	at bgm.l(SourceFile:419)
	at bgm.p(SourceFile:386)
	at bdq.t(SourceFile:1583)
	at bdq.av(SourceFile:967)
	at bdq.a(SourceFile:395)
	at net.minecraft.client.main.Main.main(SourceFile:124)


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

-- Head --
Thread: Client thread
Stacktrace:
	at aer.s(SourceFile:537)
	at abx.a(SourceFile:442)
	at bhf.a(SourceFile:119)
	at bhf.a(SourceFile:103)
	at bgm.l(SourceFile:419)
	at bgm.p(SourceFile:386)

-- Affected screen --
Details:
	Screen name: bhf

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bog['InterstellarFish'/302, l='MpServer', x=158.39, y=65.00, z=-418.09]]
	Chunk stats: MultiplayerChunkCache: 1089, 1089
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (88,70,-232), Chunk: (at 8,4,8 in 5,-15; contains blocks 80,0,-240 to 95,255,-225), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 1935554 game time, 1320327 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: 213 total; [zn['Husk'/47, l='MpServer', x=93.50, y=70.00, z=-398.50], zn['Husk'/48, l='MpServer', x=104.50, y=68.00, z=-394.50], zv['Skeleton'/49, l='MpServer', x=110.50, y=33.00, z=-361.50], wx['Squid'/51, l='MpServer', x=115.40, y=61.44, z=-411.54], wx['Squid'/52, l='MpServer', x=114.40, y=62.28, z=-404.17], wx['Squid'/53, l='MpServer', x=123.71, y=62.23, z=-410.62], wx['Squid'/54, l='MpServer', x=124.34, y=60.60, z=-410.52], wx['Squid'/55, l='MpServer', x=125.84, y=57.00, z=-413.62], zv['Skeleton'/56, l='MpServer', x=118.62, y=64.00, z=-388.20], zz['Witch'/57, l='MpServer', x=113.69, y=65.00, z=-391.20], wx['Squid'/58, l='MpServer', x=133.82, y=57.97, z=-403.54], zv['Skeleton'/59, l='MpServer', x=128.50, y=62.34, z=-392.92], zq['Zombie Pigman'/61, l='MpServer', x=153.75, y=53.00, z=-422.45], zf['Creeper'/62, l='MpServer', x=156.50, y=22.00, z=-340.50], zf['Creeper'/63, l='MpServer', x=157.50, y=22.00, z=-339.50], abi['Boat'/65, l='MpServer', x=167.19, y=62.50, z=-420.19], zv['Skeleton'/66, l='MpServer', x=160.50, y=47.00, z=-390.78], aab['Zombie'/67, l='MpServer', x=163.79, y=46.00, z=-398.48], zf['Creeper'/68, l='MpServer', x=171.50, y=70.00, z=-387.50], wo['Cow'/72, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/73, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/74, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/75, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/76, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/77, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/78, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/79, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/80, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/81, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/82, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/83, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/84, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/85, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/86, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/87, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/88, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/89, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/90, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/91, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/92, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/93, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/94, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/95, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/96, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/97, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/98, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/99, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/100, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/101, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/102, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/103, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/104, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/105, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/106, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/107, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/108, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/109, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/110, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/111, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/112, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/113, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/114, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/115, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/116, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/117, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/118, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/119, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/120, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/121, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/122, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/123, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/124, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/125, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/126, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/127, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/128, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/129, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/130, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/131, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/132, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/133, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/134, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/135, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/136, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/137, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/138, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/139, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/140, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/141, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/142, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/143, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/144, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/145, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/146, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/147, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/148, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/149, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/150, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/151, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/152, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/153, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/154, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/155, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/156, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/157, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/158, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/159, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/160, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/161, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/162, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/163, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/164, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/165, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/166, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/167, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/168, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/169, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/170, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/171, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/172, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/173, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/174, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/175, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/176, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/177, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/178, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/179, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/180, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/181, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/182, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/183, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/184, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/185, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/186, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/187, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/188, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/189, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/190, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/191, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/192, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/193, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/194, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/195, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/196, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/197, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/198, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/199, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/200, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/201, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/202, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/203, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/204, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/205, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/206, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/207, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/208, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/209, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/210, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/211, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/212, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/213, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/214, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/215, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/216, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/217, l='MpServer', x=190.55, y=64.00, z=-430.45], wo['Cow'/218, l='MpServer', x=190.45, y=64.00, z=-430.45], wo['Cow'/219, l='MpServer', x=190.55, y=64.00, z=-430.45], zf['Creeper'/220, l='MpServer', x=177.50, y=70.00, z=-384.50], wu['Rabbit'/221, l='MpServer', x=193.88, y=71.00, z=-395.98], wk['Bat'/222, l='MpServer', x=203.75, y=19.10, z=-342.25], wu['Rabbit'/228, l='MpServer', x=210.69, y=70.00, z=-387.95], zf['Creeper'/229, l='MpServer', x=218.50, y=26.00, z=-376.50], aab['Zombie'/230, l='MpServer', x=221.50, y=25.00, z=-362.50], aab['Zombie'/231, l='MpServer', x=220.78, y=21.00, z=-357.50], aab['Zombie'/232, l='MpServer', x=223.14, y=25.00, z=-362.78], aab['Zombie'/233, l='MpServer', x=220.30, y=25.00, z=-358.64], wk['Bat'/234, l='MpServer', x=214.75, y=42.10, z=-342.25], zv['Skeleton'/240, l='MpServer', x=236.76, y=26.00, z=-384.54], zv['Skeleton'/241, l='MpServer', x=233.50, y=20.00, z=-340.50], aab['Zombie'/242, l='MpServer', x=230.50, y=67.00, z=-345.25], bog['InterstellarFish'/302, l='MpServer', x=158.39, y=65.00, z=-418.09], zv['Skeleton'/344, l='MpServer', x=79.31, y=56.00, z=-477.58], wu['Rabbit'/346, l='MpServer', x=78.61, y=94.00, z=-474.46], aab['Zombie'/347, l='MpServer', x=81.58, y=63.00, z=-452.00], zf['Creeper'/352, l='MpServer', x=84.50, y=19.00, z=-488.50], zv['Skeleton'/353, l='MpServer', x=88.50, y=56.00, z=-485.50], zf['Creeper'/354, l='MpServer', x=85.50, y=84.00, z=-483.50], zv['Skeleton'/355, l='MpServer', x=88.50, y=46.00, z=-478.78], zv['Skeleton'/356, l='MpServer', x=81.50, y=65.00, z=-458.50], zf['Creeper'/357, l='MpServer', x=80.50, y=82.00, z=-453.50], aab['Zombie'/358, l='MpServer', x=81.20, y=20.00, z=-432.43], aab['Zombie'/362, l='MpServer', x=97.50, y=59.00, z=-476.21], wk['Bat'/363, l='MpServer', x=111.66, y=60.48, z=-455.29], zn['Husk'/364, l='MpServer', x=110.50, y=74.00, z=-456.50], wk['Bat'/370, l='MpServer', x=124.25, y=48.10, z=-488.75], aab['Zombie'/371, l='MpServer', x=118.30, y=48.00, z=-473.70], aab['Zombie'/372, l='MpServer', x=124.50, y=47.00, z=-479.50], wk['Bat'/373, l='MpServer', x=114.36, y=47.00, z=-476.11], zn['Husk'/374, l='MpServer', x=115.46, y=71.00, z=-469.25], wk['Bat'/379, l='MpServer', x=138.75, y=43.15, z=-493.50], zv['Skeleton'/380, l='MpServer', x=132.74, y=64.00, z=-467.54], zn['Husk'/381, l='MpServer', x=135.60, y=64.00, z=-441.79], xe['Horse'/386, l='MpServer', x=156.83, y=64.00, z=-448.05], zv['Skeleton'/387, l='MpServer', x=148.50, y=65.00, z=-453.50], zn['Husk'/388, l='MpServer', x=149.63, y=64.00, z=-457.45], zq['Zombie Pigman'/389, l='MpServer', x=153.76, y=53.00, z=-448.45], zf['Creeper'/390, l='MpServer', x=157.50, y=64.00, z=-445.50], zn['Husk'/397, l='MpServer', x=160.83, y=64.00, z=-435.46], zv['Skeleton'/399, l='MpServer', x=178.73, y=13.00, z=-464.49], aac['Zombie Villager'/400, l='MpServer', x=205.50, y=24.00, z=-476.50], zf['Creeper'/402, l='MpServer', x=213.50, y=28.00, z=-478.50], zf['Creeper'/403, l='MpServer', x=210.50, y=28.00, z=-477.50], wk['Bat'/404, l='MpServer', x=216.75, y=22.10, z=-440.75]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bmg.a(SourceFile:364)
	at bdq.b(SourceFile:2536)
	at bdq.a(SourceFile:404)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 16w36a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 221511104 bytes (211 MB) / 614973440 bytes (586 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: 95
	Launched Version: 16w36a
	LWJGL: 2.9.4
	OpenGL: AMD Radeon R7 240 GL version 4.5.13416 Compatibility Profile Context 15.300.1025.1001, 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: Yes
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: RCF Jadens 3D Ladder Model Fix.zip (incompatible)
	Current Language: English (United Kingdom)
	Profiler Position: N/A (disabled)
	CPU: 4x Intel(R) Core(TM) i3-2120 CPU @ 3.30GHz