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Can someone please help me figure out why my game keeps crashing all of a sudden, I have not added or changed any mods or settings etc, so I am not sure what is causing the problem. Here is the crash log:

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Daisy, daisy...

Time: 7/4/16 1:13 PM
Description: Ticking player

java.lang.NullPointerException: Ticking player
at net.minecraft.world.World.func_180495_p(World.java:828)
at net.minecraft.world.World.func_72875_a(World.java:2213)
at net.minecraft.entity.Entity.func_180799_ab(Entity.java:1161)
at net.minecraft.entity.Entity.func_70030_z(Entity.java:457)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:212)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:351)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1880)
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:226)
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:301)
at net.minecraft.network.NetHandlerPlayServer.func_73660_a(NetHandlerPlayServer.java:163)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:193)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:286)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:728)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:609)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:239)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)
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 net.minecraft.world.World.func_180495_p(World.java:828)
at net.minecraft.world.World.func_72875_a(World.java:2213)
at net.minecraft.entity.Entity.func_180799_ab(Entity.java:1161)
at net.minecraft.entity.Entity.func_70030_z(Entity.java:457)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:212)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:351)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1880)
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:226)

-- Player being ticked --
Details:
Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
Entity ID: 269
Entity Name: lissybaby001
Entity's Exact location: 528.26, 66.00, 256.15
Entity's Block location: World: (528,66,256), Chunk: (at 0,4,0 in 33,16; contains blocks 528,0,256 to 543,255,271), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:301)
at net.minecraft.network.NetHandlerPlayServer.func_73660_a(NetHandlerPlayServer.java:163)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:193)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:286)

-- Ticking connection --
Details:
Connection: [email protected]
Stacktrace:
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:728)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:609)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:239)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.9
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 257248200 bytes (245 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP 9.23 Powered by Forge 12.16.1.1887 Optifine OptiFine_1.9_HD_U_B5 7 mods loaded, 7 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.9-12.16.1.1887.jar)
UCHIJAAAA Forge{12.16.1.1887} [Minecraft Forge] (forge-1.9-12.16.1.1887.jar)
UCHIJAAAA decorationmegapack{1.9.4} [Decoration Mega Pack] (decorationmegapack-19410009775.zip)
UCHIJAAAA JEI{3.3.3.197} [Just Enough Items] (jei_1.9-3.3.3.197.jar)
UCHIJAAAA journeymap{1.9-5.2.3} [JourneyMap] (journeymap-1.9-5.2.3-unlimited.jar)
UCHIJAAAA plantmegapack{1.9.8} [Plant Mega Pack] (plantmegapack-19810001118.zip)
Loaded coremods (and transformers):
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [EntityPlayerMP['lissybaby001'/269, l='-8679052598817182127', x=528.26, y=66.00, z=256.15]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'
OptiFine Version: OptiFine_1.9_HD_U_B5
Render Distance Chunks: 4
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.3.12618 Compatibility Profile Context 13.251.9001.1001
OpenGlRenderer: AMD Radeon HD 6310 Graphics
OpenGlVendor: ATI Technologies Inc.
CpuCount: 2