Scheduler causing Client-Crash

Hey Im useing the latest Bukkit - Dev Build and every time a use a action, my client and all others are crashing.

Can you please help me?

Crashlog (Client):

Code:

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.
 
Time: 02.09.14 14:43
Description: Unexpected error
 
java.lang.NullPointerException: Unexpected error
    at bjb.a(SourceFile:499)
    at hp.a(SourceFile:47)
    at hp.a(SourceFile:12)
    at ej.a(SourceFile:174)
    at bje.e(SourceFile:212)
    at bao.p(SourceFile:1306)
    at bao.ak(SourceFile:774)
    at bao.f(SourceFile:728)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
 
 
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
 
-- Head --
Stacktrace:
    at bjb.a(SourceFile:499)
    at hp.a(SourceFile:47)
    at hp.a(SourceFile:12)
    at ej.a(SourceFile:174)
    at bje.e(SourceFile:212)
 
-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [bll['AragurLp'/3388, l='MpServer', x=107,88, y=72,00, z=264,75]]
    Chunk stats: MultiplayerChunkCache: 419, 419
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options:
    Level spawn location: World: (162,64,263), Chunk: (at 2,4,7 in 10,16; contains blocks 160,0,256 to 175,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 793826 game time, 34118 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: 73 total; [bjk['AragurLp'/3388, l='MpServer', x=107,88, y=73,62, z=264,76], yq['Zombie'/5248, l='MpServer', x=51,69, y=18,00, z=309,38], ya['Enderman'/5378, l='MpServer', x=167,25, y=16,00, z=269,66], yq['Zombie'/5508, l='MpServer', x=177,50, y=46,00, z=245,50], xz['Creeper'/6021, l='MpServer', x=172,50, y=49,00, z=210,50], xz['Creeper'/6790, l='MpServer', x=31,50, y=17,00, z=338,50], yn['Spider'/6026, l='MpServer', x=176,72, y=49,00, z=205,28], xz['Creeper'/5393, l='MpServer', x=148,50, y=19,00, z=242,50], yl['Skeleton'/5394, l='MpServer', x=45,50, y=11,00, z=271,50], yl['Skeleton'/5396, l='MpServer', x=43,50, y=11,00, z=274,50], yq['Zombie'/5782, l='MpServer', x=163,50, y=23,00, z=238,50], yq['Zombie'/5783, l='MpServer', x=162,84, y=23,00, z=243,28], yq['Zombie'/5785, l='MpServer', x=163,06, y=23,00, z=240,31], yq['Zombie'/5537, l='MpServer', x=59,50, y=28,00, z=294,50], yq['Zombie'/5793, l='MpServer', x=169,13, y=48,00, z=243,78], yq['Zombie'/6817, l='MpServer', x=134,50, y=50,00, z=272,50], yl['Skeleton'/6953, l='MpServer', x=169,50, y=17,00, z=269,50], wh['Cow'/42, l='MpServer', x=41,47, y=65,00, z=271,47], yl['Skeleton'/5802, l='MpServer', x=132,50, y=57,00, z=319,50], yq['Zombie'/6954, l='MpServer', x=169,50, y=17,00, z=268,50], wo['Pig'/43, l='MpServer', x=43,47, y=65,00, z=276,97], yq['Zombie'/6955, l='MpServer', x=170,50, y=17,00, z=267,50], yl['Skeleton'/5804, l='MpServer', x=130,50, y=57,00, z=319,50], yq['Zombie'/6956, l='MpServer', x=170,50, y=17,00, z=268,50], xz['Creeper'/6192, l='MpServer', x=61,88, y=62,00, z=292,78], yl['Skeleton'/5297, l='MpServer', x=44,50, y=26,00, z=293,50], bll['AragurLp'/3388, l='MpServer', x=107,88, y=72,00, z=264,75], xz['Creeper'/6715, l='MpServer', x=179,50, y=46,00, z=244,50], bll['AragurLp'/3388, l='MpServer', x=107,88, y=72,00, z=264,75], wg['Chicken'/3395, l='MpServer', x=28,53, y=75,00, z=305,34], yl['Skeleton'/6854, l='MpServer', x=141,50, y=52,00, z=238,50], wh['Cow'/75, l='MpServer', x=111,47, y=56,00, z=220,53], yq['Zombie'/4939, l='MpServer', x=63,50, y=15,00, z=284,50], wo['Pig'/76, l='MpServer', x=109,50, y=64,00, z=218,50], xz['Creeper'/6732, l='MpServer', x=39,50, y=18,00, z=286,50], yq['Zombie'/6988, l='MpServer', x=77,50, y=49,00, z=276,50], wh['Cow'/77, l='MpServer', x=110,47, y=68,00, z=219,75], wh['Cow'/80, l='MpServer', x=113,53, y=58,00, z=216,28], wo['Pig'/81, l='MpServer', x=115,53, y=68,00, z=219,34], wo['Pig'/83, l='MpServer', x=120,00, y=58,00, z=225,84], yl['Skeleton'/6099, l='MpServer', x=47,50, y=55,00, z=302,50], wh['Cow'/84, l='MpServer', x=126,53, y=64,00, z=230,34], yl['Skeleton'/6100, l='MpServer', x=48,50, y=55,00, z=305,50], xz['Creeper'/6102, l='MpServer', x=78,50, y=70,00, z=313,50], wo['Pig'/87, l='MpServer', x=146,06, y=63,00, z=210,50], xz['Creeper'/6999, l='MpServer', x=140,50, y=19,00, z=246,50], wo['Pig'/88, l='MpServer', x=135,50, y=64,00, z=238,03], wh['Cow'/89, l='MpServer', x=132,59, y=64,00, z=239,22], wo['Pig'/90, l='MpServer', x=128,53, y=64,00, z=232,03], xz['Creeper'/5467, l='MpServer', x=184,50, y=45,00, z=252,50], wo['Pig'/92, l='MpServer', x=135,47, y=58,00, z=241,69], xz['Creeper'/5468, l='MpServer', x=177,70, y=45,00, z=248,69], wh['Cow'/93, l='MpServer', x=142,53, y=64,00, z=249,31], wo['Pig'/94, l='MpServer', x=143,03, y=64,00, z=253,38], wo['Pig'/99, l='MpServer', x=150,88, y=63,00, z=207,47], yq['Zombie'/6756, l='MpServer', x=47,03, y=17,00, z=306,44], xz['Creeper'/6757, l='MpServer', x=50,97, y=18,00, z=310,48], yq['Zombie'/5225, l='MpServer', x=33,53, y=15,00, z=270,03], yq['Zombie'/5226, l='MpServer', x=31,50, y=15,00, z=265,50], yl['Skeleton'/4844, l='MpServer', x=81,50, y=32,00, z=232,50], wo['Pig'/109, l='MpServer', x=166,44, y=63,00, z=202,69], yq['Zombie'/6765, l='MpServer', x=184,09, y=45,00, z=257,59], yq['Zombie'/6766, l='MpServer', x=184,66, y=43,00, z=264,34], yq['Zombie'/6768, l='MpServer', x=182,50, y=43,00, z=262,50], yl['Skeleton'/5233, l='MpServer', x=132,84, y=50,00, z=270,44], yl['Skeleton'/6513, l='MpServer', x=159,63, y=15,00, z=239,94], yl['Skeleton'/6769, l='MpServer', x=177,50, y=43,00, z=267,50], wo['Pig'/113, l='MpServer', x=181,38, y=63,00, z=280,97], yl['Skeleton'/6131, l='MpServer', x=79,50, y=64,00, z=326,50], yl['Skeleton'/5626, l='MpServer', x=49,50, y=12,00, z=272,50], yl['Skeleton'/5627, l='MpServer', x=49,50, y=12,00, z=271,50], yl['Skeleton'/5246, l='MpServer', x=52,50, y=36,00, z=289,50], yl['Skeleton'/5375, l='MpServer', x=65,06, y=16,00, z=286,50]]
    Retry entities: 0 total; []
    Server brand: CraftBukkit
    Server type: Non-integrated multiplayer server
Stacktrace:
    at bjf.a(SourceFile:289)
    at bao.b(SourceFile:1972)
    at bao.f(SourceFile:742)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
 
-- System Details --
Details:
    Minecraft Version: 1.7.10
    Operating System: Windows 8.1 (amd64) version 6.3
    Java Version: 1.8.0_20, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 164877832 bytes (157 MB) / 255066112 bytes (243 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
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
    Launched Version: 1.7.10-OptiFine_HD_A4
    LWJGL: 2.9.1
    OpenGL: GeForce GTX 770/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.
 
    Is Modded: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Resource Packs: []
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Anisotropic Filtering: Off (1)

 

AragurLp
What is your code?

 

This is the Scheduler Part.
If I delete it the whole Method works.

Code:java

Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
            @Override
            public void run() {
                System.out.println("Test");
            }
        }, 5L);