I was messing around with arrows until I shot a arrow into my portal then the server crashed. I have not found this bug reported.

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 1/1/15 6:26 AM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at ayw.f(SourceFile:263)
at arf.b(SourceFile:123)
at arf.a(SourceFile:59)
at sp.a(SourceFile:514)
at wy.c(SourceFile:1752)
at wy.K(SourceFile:303)
at wy.t_(SourceFile:266)
at ahh.t_(SourceFile:180)
at aqs.a(SourceFile:1407)
at qu.a(SourceFile:600)
at aqs.g(SourceFile:1385)
at aqs.i(SourceFile:1278)
at qu.i(SourceFile:478)
at net.minecraft.server.MinecraftServer.A(SourceFile:605)
at pp.A(SourceFile:299)
at net.minecraft.server.MinecraftServer.z(SourceFile:533)
at net.minecraft.server.MinecraftServer.run(SourceFile:449)
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 –
Stacktrace:
at ayw.f(SourceFile:263)
at arf.b(SourceFile:123)
at arf.a(SourceFile:59)
at sp.a(SourceFile:514)
at wy.c(SourceFile:1752)
at wy.K(SourceFile:303)
at wy.t_(SourceFile:266)
at ahh.t_(SourceFile:180)
at aqs.a(SourceFile:1407)
at qu.a(SourceFile:600)
at aqs.g(SourceFile:1385)

– Entity being ticked –
Details:
Entity Type: Arrow (ahh)
Entity ID: 1021
Entity Name: Arrow
Entity's Exact location: 1761.00, 78.50, -178.00
Entity's Block location: 1761.00,78.00,-178.00 - World: (1761,78,-178), Chunk: (at 1,4,14 in 110,-12; contains blocks 1760,0,-192 to 1775,255,-177), Region: (3,-1; contains chunks 96,-32 to 127,-1, blocks 1536,0,-512 to 2047,255,-1)
Entity's Momentum: -3.01, -0.09, -0.01
Entity's Rider: ~_ERROR~ NullPointerException: null
Entity's Vehicle: ~_ERROR~ NullPointerException: null
Stacktrace:
at aqs.i(SourceFile:1278)
at qu.i(SourceFile:478)

– Affected level –
Details:
Level name: world
All players: 1 total; [qx['Dummyc0m'/258, l='world', x=14095.88, y=77.00, z=-1424.66]]
Chunk stats: ServerChunkCache: 1100 Drop: 0
Level seed: 56349376
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: 13025.00,70.00,-905.00 - World: (13025,70,-905), Chunk: (at 1,4,7 in 814,-57; contains blocks 13024,0,-912 to 13039,255,-897), Region: (25,-2; contains chunks 800,-64 to 831,-33, blocks 12800,0,-1024 to 13311,255,-513)
Level time: 497769401 game time, 109454987 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 130829 (now: false), thunder time: 23061 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.A(SourceFile:605)
at pp.A(SourceFile:299)
at net.minecraft.server.MinecraftServer.z(SourceFile:533)
at net.minecraft.server.MinecraftServer.run(SourceFile:449)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.8.2-pre1
Operating System: Linux (amd64) version 3.16.7-x86_64-linode49
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 67163776 bytes (64 MB) / 355885056 bytes (339 MB) up to 1056309248 bytes (1007 MB)
JVM Flags: 6 total; -Xmx1024M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Profiler Position: N/A (disabled)
Player Count: 1 / 20; [qx['Dummyc0m'/258, l='world', x=14095.88, y=77.00, z=-1424.66]]
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)