Minecraft crashes EVERYTIME I open my save.

It never happened before 19w39a

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 16. 9. 29 오후 6:09
Description: Ticking block entity

java.lang.NullPointerException: Ticking block entity
at asg.b(SourceFile:316)
at asg.c(SourceFile:372)
at asg.b(SourceFile:401)
at asi.a(SourceFile:345)
at asi.a(SourceFile:364)
at asi.a(SourceFile:332)
at asi.J(SourceFile:193)
at asi.o(SourceFile:135)
at asi.F_(SourceFile:122)
at ajl.k(SourceFile:1429)
at lv.k(SourceFile:549)
at net.minecraft.server.MinecraftServer.D(SourceFile:634)
at net.minecraft.server.MinecraftServer.C(SourceFile:562)
at cby.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:466)
at java.lang.Thread.run(Unknown Source)

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

– Head –
Thread: Server thread
Stacktrace:
at asg.b(SourceFile:316)
at asg.c(SourceFile:372)
at asg.b(SourceFile:401)
at asi.a(SourceFile:345)
at asi.a(SourceFile:364)
at asi.a(SourceFile:332)
at asi.J(SourceFile:193)
at asi.o(SourceFile:135)
at asi.F_(SourceFile:122)

– Block entity being ticked –
Details:
Name: minecraft:hopper // asi
Block type: ID #154 (tile.hopper // aoa)
Block data value: 5 / 0x5 / 0b0101
Block location: World: (-129,60,239), Chunk: (at 15,3,15 in -9,14; contains blocks -144,0,224 to -129,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Actual block type: ID #154 (tile.hopper // aoa)
Actual block data value: 5 / 0x5 / 0b0101
Stacktrace:
at ajl.k(SourceFile:1429)
at lv.k(SourceFile:549)

– Affected level –
Details:
Level name: budgage's private map
All players: 0 total; []
Chunk stats: ServerChunkCache: 625 Drop: 0
Level seed: 930067455135623264
Level generator: ID 04 - customized, ver 0. Features enabled: true
Level generator options:

{"coordinateScale":684.412,"heightScale":684.412,"lowerLimitScale":512.0,"upperLimitScale":512.0,"depthNoiseScaleX":200.0,"depthNoiseScaleZ":200.0,"depthNoiseScaleExponent":0.5,"mainNoiseScaleX":80.0,"mainNoiseScaleY":160.0,"mainNoiseScaleZ":80.0,"baseSize":8.5,"stretchY":12.0,"biomeDepthWeight":1.0,"biomeDepthOffset":0.0,"biomeScaleWeight":1.0,"biomeScaleOffset":0.0,"seaLevel":63,"useCaves":true,"useDungeons":true,"dungeonChance":8,"useStrongholds":true,"useVillages":true,"useMineShafts":true,"useTemples":true,"useMonuments":true,"useRavines":true,"useWaterLakes":true,"waterLakeChance":4,"useLavaLakes":true,"lavaLakeChance":80,"useLavaOceans":false,"fixedBiome":-1,"biomeSize":3,"riverSize":4,"dirtSize":33,"dirtCount":10,"dirtMinHeight":0,"dirtMaxHeight":256,"gravelSize":33,"gravelCount":8,"gravelMinHeight":0,"gravelMaxHeight":256,"graniteSize":11,"graniteCount":3,"graniteMinHeight":0,"graniteMaxHeight":80,"dioriteSize":11,"dioriteCount":3,"dioriteMinHeight":0,"dioriteMaxHeight":80,"andesiteSize":11,"andesiteCount":3,"andesiteMinHeight":0,"andesiteMaxHeight":80,"coalSize":25,"coalCount":25,"coalMinHeight":0,"coalMaxHeight":128,"ironSize":20,"ironCount":25,"ironMinHeight":0,"ironMaxHeight":64,"goldSize":20,"goldCount":25,"goldMinHeight":0,"goldMaxHeight":32,"redstoneSize":15,"redstoneCount":25,"redstoneMinHeight":0,"redstoneMaxHeight":16,"diamondSize":20,"diamondCount":25,"diamondMinHeight":0,"diamondMaxHeight":16,"lapisSize":14,"lapisCount":25,"lapisCenterHeight":16,"lapisSpread":16}

Level spawn location: World: (-135,69,268), Chunk: (at 9,4,12 in -9,16; contains blocks -144,0,256 to -129,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 14391669 game time, 18171742 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 170907 (now: false), thunder time: 13733 (now: true)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.D(SourceFile:634)
at net.minecraft.server.MinecraftServer.C(SourceFile:562)
at cby.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:466)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 16w39a
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_101, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 654371728 bytes (624 MB) / 983871488 bytes (938 MB) up to 3113877504 bytes (2969 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn1G
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 93
Profiler Position: N/A (disabled)
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.