---- Minecraft Crash Report ----
// Don't do that.

Time: 9/28/16 9:33 PM
Description: Updating screen events

java.lang.NullPointerException: Updating screen events
at asg.b(SourceFile:316)
at asg.c(SourceFile:372)
at acs.b(SourceFile:108)
at acg.a(SourceFile:193)
at bni.a(SourceFile:413)
at bhz.a(SourceFile:512)
at bhz.a(SourceFile:334)
at bhh.k(SourceFile:403)
at bhh.p(SourceFile:380)
at bel.t(SourceFile:1583)
at bel.av(SourceFile:967)
at bel.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 asg.b(SourceFile:316)
at asg.c(SourceFile:372)
at acs.b(SourceFile:108)
at acg.a(SourceFile:193)
at bni.a(SourceFile:413)
at bhz.a(SourceFile:512)
at bhz.a(SourceFile:334)
at bhh.k(SourceFile:403)
at bhh.p(SourceFile:380)

– Affected screen –
Details:
Screen name: bin

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bpl['Generation_X3'/205, l='MpServer', x=-398.68, y=66.00, z=1342.46]]
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: (-256,64,256), Chunk: (at 0,4,0 in -16,16; contains blocks -256,0,256 to -241,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 444407 game time, 476416 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: 130 total; [aah['Witch'/520, l='MpServer', x=-399.50, y=66.00, z=1275.50], wr['Chicken'/521, l='MpServer', x=-397.89, y=65.00, z=1300.10], ze['item.item.egg'/522, l='MpServer', x=-398.74, y=65.00, z=1300.74], abu['Minecart with Chest'/523, l='MpServer', x=-389.50, y=12.06, z=1321.49], abu['Minecart with Chest'/524, l='MpServer', x=-385.50, y=17.00, z=1345.93], wo['Bat'/525, l='MpServer', x=-386.52, y=24.00, z=1347.75], abp['Arrow'/526, l='MpServer', x=-393.38, y=64.02, z=1358.73], abu['Minecart with Chest'/527, l='MpServer', x=-389.50, y=21.06, z=1396.11], zk['Creeper'/528, l='MpServer', x=-388.50, y=21.00, z=1396.50], zk['Creeper'/538, l='MpServer', x=-372.80, y=64.00, z=1265.65], zk['Creeper'/539, l='MpServer', x=-380.50, y=64.00, z=1273.50], wr['Chicken'/540, l='MpServer', x=-379.85, y=65.00, z=1300.13], aab['Skeleton'/541, l='MpServer', x=-371.50, y=65.00, z=1304.50], zk['Creeper'/542, l='MpServer', x=-378.50, y=65.00, z=1305.50], wr['Chicken'/543, l='MpServer', x=-372.79, y=64.00, z=1361.86], wr['Chicken'/544, l='MpServer', x=-370.41, y=64.00, z=1366.81], ze['item.item.egg'/545, l='MpServer', x=-371.94, y=64.00, z=1361.79], ze['item.item.egg'/546, l='MpServer', x=-371.32, y=64.00, z=1367.21], wo['Bat'/547, l='MpServer', x=-355.86, y=40.76, z=1396.19], aad['Spider'/548, l='MpServer', x=-368.47, y=64.00, z=1401.10], wr['Chicken'/571, l='MpServer', x=-361.82, y=65.00, z=1277.88], ze['item.item.egg'/572, l='MpServer', x=-362.31, y=65.00, z=1278.59], wr['Chicken'/573, l='MpServer', x=-359.43, y=66.00, z=1289.13], zm['Enderman'/574, l='MpServer', x=-354.44, y=65.00, z=1296.50], aaj['Zombie'/575, l='MpServer', x=-363.50, y=65.00, z=1314.50], aaj['Zombie'/576, l='MpServer', x=-363.50, y=65.00, z=1312.50], abu['Minecart with Chest'/577, l='MpServer', x=-353.51, y=16.00, z=1334.50], aaj['Zombie'/578, l='MpServer', x=-354.50, y=31.00, z=1342.50], abu['Minecart with Chest'/579, l='MpServer', x=-364.50, y=24.06, z=1353.50], aab['Skeleton'/580, l='MpServer', x=-356.50, y=17.00, z=1345.50], wo['Bat'/581, l='MpServer', x=-366.13, y=17.10, z=1360.36], wo['Bat'/582, l='MpServer', x=-367.25, y=25.10, z=1345.88], wo['Bat'/583, l='MpServer', x=-357.25, y=24.23, z=1345.75], wo['Bat'/584, l='MpServer', x=-363.74, y=15.12, z=1368.95], wo['Bat'/585, l='MpServer', x=-360.58, y=13.19, z=1365.24], ze['item.item.egg'/1101, l='MpServer', x=-360.59, y=65.00, z=1288.43], ze['item.item.egg'/1103, l='MpServer', x=-427.53, y=67.00, z=1286.13], zk['Creeper'/597, l='MpServer', x=-337.35, y=64.00, z=1275.16], wr['Chicken'/598, l='MpServer', x=-349.45, y=66.00, z=1285.50], ze['item.item.egg'/599, l='MpServer', x=-348.94, y=66.00, z=1284.88], zk['Creeper'/600, l='MpServer', x=-344.48, y=33.00, z=1317.84], so['Experience Orb'/344, l='MpServer', x=-488.20, y=64.00, z=1341.65], zk['Creeper'/601, l='MpServer', x=-346.50, y=64.00, z=1321.50], so['Experience Orb'/345, l='MpServer', x=-488.52, y=64.00, z=1340.55], zk['Creeper'/602, l='MpServer', x=-349.50, y=64.00, z=1325.50], so['Experience Orb'/346, l='MpServer', x=-487.86, y=64.00, z=1341.64], zk['Creeper'/603, l='MpServer', x=-344.50, y=64.00, z=1324.50], aad['Spider'/604, l='MpServer', x=-343.01, y=61.00, z=1334.01], abu['Minecart with Chest'/605, l='MpServer', x=-349.50, y=23.06, z=1353.50], wr['Chicken'/606, l='MpServer', x=-345.52, y=60.00, z=1361.55], ww['Pig'/607, l='MpServer', x=-342.72, y=69.00, z=1409.50], wr['Chicken'/615, l='MpServer', x=-331.16, y=64.00, z=1305.49], wr['Chicken'/616, l='MpServer', x=-328.18, y=64.00, z=1304.53], aaj['Zombie'/360, l='MpServer', x=-471.50, y=35.00, z=1294.50], ww['Pig'/361, l='MpServer', x=-466.30, y=67.00, z=1284.46], wr['Chicken'/618, l='MpServer', x=-336.10, y=64.00, z=1320.18], abu['Minecart with Chest'/362, l='MpServer', x=-477.50, y=39.06, z=1303.88], aaj['Zombie'/619, l='MpServer', x=-326.15, y=64.00, z=1322.78], wr['Chicken'/363, l='MpServer', x=-468.13, y=64.00, z=1298.74], aaj['Zombie'/620, l='MpServer', x=-332.50, y=28.00, z=1335.50], aaj['Zombie'/364, l='MpServer', x=-469.50, y=38.00, z=1317.50], aaj['Zombie'/621, l='MpServer', x=-323.10, y=28.00, z=1332.40], wo['Bat'/365, l='MpServer', x=-461.39, y=40.12, z=1313.64], aaj['Zombie'/622, l='MpServer', x=-323.75, y=28.00, z=1332.56], aah['Witch'/366, l='MpServer', x=-478.50, y=45.00, z=1343.50], aak['Zombie Villager'/623, l='MpServer', x=-324.52, y=31.00, z=1350.98], wo['Bat'/367, l='MpServer', x=-463.34, y=27.41, z=1354.37], aab['Skeleton'/624, l='MpServer', x=-326.31, y=30.00, z=1351.43], wo['Bat'/368, l='MpServer', x=-461.25, y=24.04, z=1348.25], aad['Spider'/369, l='MpServer', x=-472.50, y=64.00, z=1350.50], zk['Creeper'/626, l='MpServer', x=-328.50, y=13.00, z=1366.50], wr['Chicken'/370, l='MpServer', x=-478.43, y=64.00, z=1370.79], wr['Chicken'/627, l='MpServer', x=-334.37, y=70.00, z=1395.89], ww['Pig'/372, l='MpServer', x=-464.71, y=64.00, z=1385.19], ww['Pig'/373, l='MpServer', x=-466.71, y=64.00, z=1390.77], ww['Pig'/629, l='MpServer', x=-324.71, y=68.00, z=1408.51], ww['Pig'/388, l='MpServer', x=-459.75, y=70.00, z=1263.50], xi['Horse'/390, l='MpServer', x=-456.43, y=67.00, z=1282.99], wr['Chicken'/391, l='MpServer', x=-463.15, y=67.00, z=1283.57], ze['item.item.egg'/392, l='MpServer', x=-457.08, y=64.00, z=1292.95], wr['Chicken'/393, l='MpServer', x=-453.50, y=65.00, z=1307.22], ww['Pig'/394, l='MpServer', x=-450.19, y=65.00, z=1335.80], wo['Bat'/395, l='MpServer', x=-460.16, y=32.33, z=1353.52], aab['Skeleton'/396, l='MpServer', x=-442.70, y=64.00, z=1367.23], aab['Skeleton'/397, l='MpServer', x=-454.40, y=64.00, z=1362.46], wo['Bat'/398, l='MpServer', x=-463.75, y=31.10, z=1396.75], aaj['Zombie'/399, l='MpServer', x=-462.50, y=64.00, z=1399.50], wr['Chicken'/413, l='MpServer', x=-433.50, y=72.00, z=1262.59], ww['Pig'/415, l='MpServer', x=-438.51, y=64.00, z=1285.78], ww['Pig'/416, l='MpServer', x=-442.78, y=64.00, z=1287.49], xi['Horse'/417, l='MpServer', x=-439.17, y=66.00, z=1312.39], wr['Chicken'/418, l='MpServer', x=-437.91, y=66.00, z=1310.23], ze['item.item.egg'/419, l='MpServer', x=-447.33, y=65.00, z=1299.98], zk['Creeper'/420, l='MpServer', x=-433.70, y=65.00, z=1328.83], aab['Skeleton'/422, l='MpServer', x=-444.32, y=64.00, z=1362.03], wr['Chicken'/423, l='MpServer', x=-445.65, y=64.00, z=1382.20], ze['item.item.egg'/424, l='MpServer', x=-445.55, y=64.00, z=1382.37], aao['Villager'/189, l='MpServer', x=-418.70, y=67.00, z=1335.48], aao['Villager'/190, l='MpServer', x=-426.05, y=67.00, z=1329.26], aaj['Zombie'/191, l='MpServer', x=-426.45, y=66.94, z=1331.30], ws['Cow'/192, l='MpServer', x=-421.08, y=67.00, z=1324.38], ws['Cow'/193, l='MpServer', x=-425.22, y=67.00, z=1321.52], ws['Cow'/194, l='MpServer', x=-421.85, y=67.00, z=1321.21], aao['Villager'/195, l='MpServer', x=-426.57, y=67.00, z=1328.63], aao['Villager'/196, l='MpServer', x=-427.55, y=68.00, z=1327.95], aao['Villager'/197, l='MpServer', x=-399.25, y=66.00, z=1341.24], wr['Chicken'/453, l='MpServer', x=-430.18, y=70.00, z=1263.86], abp['Arrow'/198, l='MpServer', x=-408.05, y=65.79, z=1344.15], ww['Pig'/199, l='MpServer', x=-398.52, y=64.00, z=1328.71], yt['entity.ItemFrame.name'/203, l='MpServer', x=-401.97, y=68.50, z=1342.50], abp['Arrow'/204, l='MpServer', x=-413.95, y=65.05, z=1343.92], abu['Minecart with Chest'/461, l='MpServer', x=-429.50, y=27.06, z=1267.50], xi['Horse'/463, l='MpServer', x=-430.85, y=66.00, z=1295.11], wr['Chicken'/464, l='MpServer', x=-427.58, y=67.00, z=1286.49], wr['Chicken'/465, l='MpServer', x=-425.12, y=67.00, z=1287.49], ze['item.item.egg'/466, l='MpServer', x=-424.57, y=67.00, z=1288.26], aab['Skeleton'/467, l='MpServer', x=-419.51, y=66.00, z=1301.75], ww['Pig'/469, l='MpServer', x=-431.68, y=64.00, z=1373.44], aak['Zombie Villager'/470, l='MpServer', x=-433.19, y=64.00, z=1392.52], aak['Zombie Villager'/471, l='MpServer', x=-425.50, y=63.00, z=1395.50], bpl['Generation_X3'/205, l='MpServer', x=-398.68, y=66.00, z=1342.46], xi['Horse'/487, l='MpServer', x=-417.87, y=68.00, z=1266.99], aaj['Zombie'/489, l='MpServer', x=-402.50, y=28.00, z=1272.50], aaj['Zombie'/490, l='MpServer', x=-402.50, y=28.00, z=1270.50], xi['Horse'/491, l='MpServer', x=-409.96, y=66.00, z=1277.98], xi['Horse'/492, l='MpServer', x=-409.83, y=67.00, z=1274.78], wo['Bat'/493, l='MpServer', x=-412.99, y=39.69, z=1288.59], wr['Chicken'/494, l='MpServer', x=-414.15, y=66.00, z=1303.86], wr['Chicken'/496, l='MpServer', x=-402.80, y=63.00, z=1412.60], aab['Skeleton'/500, l='MpServer', x=-409.32, y=63.00, z=1421.71]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bnj.a(SourceFile:365)
at bel.b(SourceFile:2536)
at bel.a(SourceFile:404)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 16w39a
Operating System: Windows 10 (x86) version 10.0
Java Version: 1.8.0_101, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 247990408 bytes (236 MB) / 485249024 bytes (462 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 16w39a
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 4600 GL version 4.3.0 - Build 20.19.15.4444, Intel
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:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-4210M CPU @ 2.60GHz

I can't find the file sorry but I had it copied from before.