---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 1/4/13 12:27 PM
Description: Exception in server tick loop

java.lang.OutOfMemoryError: Java heap space
	at java.util.HashMap.createEntry(Unknown Source)
	at java.util.HashMap.addEntry(Unknown Source)
	at java.util.HashMap.put(Unknown Source)
	at bq.a(SourceFile:35)
	at by.a(SourceFile:38)
	at cd.b(SourceFile:96)
	at bq.a(SourceFile:34)
	at cd.b(SourceFile:96)
	at bq.a(SourceFile:34)
	at cd.b(SourceFile:96)
	at ca.a(SourceFile:75)
	at aam.a(SourceFile:54)
	at im.f(SourceFile:125)
	at im.c(SourceFile:76)
	at il.<init>(SourceFile:26)
	at ik.a(SourceFile:172)
	at ik.a(SourceFile:203)
	at gm.a(SourceFile:104)
	at gm.c(SourceFile:147)
	at gm.a(SourceFile:81)
	at beq.b(SourceFile:73)
	at net.minecraft.server.MinecraftServer.r(SourceFile:762)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at ben.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)


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

-- System Details --
Details:
	Minecraft Version: 13w01b
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 261812640 bytes (249 MB) / 945356800 bytes (901 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 1927 (107912 bytes; 0 MB) allocated, 1823 (102088 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 226 (12656 bytes; 0 MB) allocated, 222 (12432 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['JohnBoy769'/149685, l='World 1', x=343.50, y=75.00, z=449.50]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.