I handed a Totem of undying and used command "/effect @p minecraft:instant_damage 1 2" in survival mode and the game crashed.

These are my crash report:
---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 16-9-29 下午12:06
Description: Ticking player

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.remove(HashMap.java:1443)
at sr.bO(SourceFile:514)
at sr.U(SourceFile:309)
at si.A_(SourceFile:351)
at sr.A_(SourceFile:1616)
at aat.A_(SourceFile:271)
at lx.k_(SourceFile:282)
at mh.F_(SourceFile:179)
at er.a(SourceFile:232)
at mg.c(SourceFile:187)
at net.minecraft.server.MinecraftServer.D(SourceFile:652)
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(Thread.java:745)

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

– Head –
Thread: Server thread
Stacktrace:
at java.util.HashMap$HashIterator.remove(HashMap.java:1443)
at sr.bO(SourceFile:514)
at sr.U(SourceFile:309)
at si.A_(SourceFile:351)
at sr.A_(SourceFile:1616)
at aat.A_(SourceFile:271)

– Player being ticked –
Details:
Entity Type: null (lx)
Entity ID: 140
Entity Name: 58115310
Entity's Exact location: 113.31, 64.00, -169.06
Entity's Block location: World: (113,64,-170), Chunk: (at 1,4,6 in 7,-11; contains blocks 112,0,-176 to 127,255,-161), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ~_ERROR~ NullPointerException: null
Stacktrace:
at lx.k_(SourceFile:282)
at mh.F_(SourceFile:179)
at er.a(SourceFile:232)

– Ticking connection –
Details:
Connection: er@4f1786b6
Stacktrace:
at mg.c(SourceFile:187)
at net.minecraft.server.MinecraftServer.D(SourceFile:652)
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(Thread.java:745)

– System Details –
Details:
Minecraft Version: 16w39a
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: 181945912 bytes (173 MB) / 343777280 bytes (327 MB) up to 2134114304 bytes (2035 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [lx['58115310'/140, l='New World', x=113.31, y=64.00, z=-169.06]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.