There are no mods when I get close to a specific area (It's an arena made of obsidian and netherrack) When the arena starts generating (Underneeth it is some flowing lava, not much, and water is flowing in the middle) I receive this error. The closer I got, the more it would crash. So I put myself in the center of the arena, and the game now gives me this error. I ran some region fixers, and opened with MC Edit, and they all work fine.
I put the map in single player (Again, no mods, no anything) and it still crashed in the same spot. I posted the file below.
Environment
Details:
Minecraft Version: 1.4.4
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 442528272 bytes (422 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 10817 (605752 bytes; 0 MB) allocated, 10817 (605752 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: GeForce GTX 550 Ti/PCIe/SSE2 GL version 4.2.0, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Shavercraft.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Based on a crash report provided in this issue, I believe with high certainty that this report may be a duplicate of MC-2956. If I am wrong, please go yell at Dinnerbone.