Crash Report

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 27/12/13 19:10
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
	at net.minecraft.block.Block.func_149700_E(Block.java:974)
	at net.minecraft.block.BlockIce.func_149636_a(SourceFile:36)
	at net.minecraft.server.management.ItemInWorldManager.func_73084_b(ItemInWorldManager.java:305)
	at net.minecraft.server.management.ItemInWorldManager.func_73082_a(ItemInWorldManager.java:224)
	at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:495)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:53)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:8)
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:198)
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:680)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:568)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:114)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:705)


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

-- Head --
Stacktrace:
	at net.minecraft.block.Block.func_149700_E(Block.java:974)
	at net.minecraft.block.BlockIce.func_149636_a(SourceFile:36)
	at net.minecraft.server.management.ItemInWorldManager.func_73084_b(ItemInWorldManager.java:305)
	at net.minecraft.server.management.ItemInWorldManager.func_73082_a(ItemInWorldManager.java:224)
	at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:495)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:53)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:8)
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:198)

-- Ticking connection --
Details:
	Connection: net.minecraft.network.NetworkManager@291fe0e4
Stacktrace:
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:680)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:568)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:114)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:705)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 252195608 bytes (240 MB) / 500695040 bytes (477 MB) up to 954728448 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 381 (21336 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	FML: MCP v9.01-pre FML v7.2.23.968 Minecraft Forge 10.12.0.968 3 mods loaded, 3 mods active
	mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	FML{7.2.23.968} [Forge Mod Loader] (forge-1.7.2-10.12.0.968.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Forge{10.12.0.968} [Minecraft Forge] (forge-1.7.2-10.12.0.968.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 28 (1568 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [EntityPlayerMP['CreazzyCruise'/0, l='SkyBlock2.1', x=0.50, y=67.02, z=-2.50]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'fml,forge'