Minecraft Forums

My issue is basically all in the title. I was playing fine on this world earlier today, but now when I open it I get "Building Terrain" then it takes me to the main menu screen. Sometimes it will take me into the game after a few seconds, but then only a few nearby chunks are loaded and I can't break blocks or activate pressure plates (blocks come back and plates don't respond). Eventually my fps drops to the point where I can't even pause the game and I have to end the process.
I've tried searching and it seems like people have had the same issue, but never actually found/posted a solution.
I don't get a crash log unless I try to open the world again when I'm taken back to the menu. I have a feeling that crash is related to me trying to open the world again while it's already kind of trying to do that. Either way, here's that log:



Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Exception in server tick loop

A full error report has been saved to C:\Users\Chad\AppData\Roaming\.minecraft\crash-reports\crash-2013-01-26_17.52.53-server.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash



--- BEGIN ERROR REPORT 714d3f5a --------
Full report at:
C:\Users\Chad\AppData\Roaming\.minecraft\crash-reports\crash-2013-01-26_17.52.53-server.txt
Please show that file to Mojang, NOT just this screen!

Generated 1/26/13 5:53 PM

-- System Details --
Details:
Minecraft Version: 13w04a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_03, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 539312432 bytes (514 MB) / 648740864 bytes (618 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 40747 (2281832 bytes; 2 MB) allocated, 40747 (2281832 bytes; 2 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 71
Profiler Position: N/A (disabled)
Vec3 Pool Size: 5762 (322672 bytes; 0 MB) allocated, 5762 (322672 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

java.lang.NullPointerException
at cf.b(SourceFile:103)
at cf.a(SourceFile:35)
at jf.b(SourceFile:440)
at gs.a(SourceFile:76)
at bhz.b(SourceFile:73)
at net.minecraft.server.MinecraftServer.r(SourceFile:478)
at net.minecraft.server.MinecraftServer.q(SourceFile:395)
at bhw.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:329)
at gn.run(SourceFile:565)
--- END ERROR REPORT 711cf6ee ----------

I'm guessing something in the world is corrupt, but I don't know what it is or how to find that out. I can also play on other worlds just fine, so it's not the whole game that's messed up. I've also force updated a lot. By the way, I'm on Snapshot 13w04a, and I made sure to install that before loading the world after the force update.
I've also tried messing around with MCedit to solve the problem. I could add blocks and they would appear when I loaded the world, but it made no difference. I also tried deleting my ~100 cows that were nearby but that didn't help. Any help or ideas would be appreciated.

I think you just have a corrupted world. Try rolling back to and older version and see if that works.

Quote from diamond_rake

I think you just have a corrupted world. Try rolling back to and older version and see if that works.

The only backup I have was the one I made before I started messing around with MCedit, so it's already corrupted. Guessing I might just be screwed, then? Unless there's a way to fix it