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While working on a map I decided to use MCedit and deleted a bunch of chunks to create floating islands when I entered the area I changed my game crashed could someone help?

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

-- Head --
Stacktrace:
at java.util.Random.nextInt(Unknown Source)
at agl.a(SourceFile:122)
at agl.a(SourceFile:27)
at agf.a(SourceFile:362)
at aha.a(SourceFile:74)
at apk.a(SourceFile:432)
at mh.a(SourceFile:160)
at aoi.a(SourceFile:781)
at mh.c(SourceFile:95)
at mg.<init>(SourceFile:31)
at mf.a(SourceFile:212)
at mf.a(SourceFile:249)
at lc.a(SourceFile:155)
at lc.c(SourceFile:206)
at lc.a(SourceFile:100)
at nc.c(SourceFile:87)
at nc.a(SourceFile:52)
at ef.a(SourceFile:145)

-- Ticking connection --
Details:
Connection: [email protected]
Stacktrace:
at mr.c(SourceFile:134)
at net.minecraft.server.MinecraftServer.u(SourceFile:529)
at net.minecraft.server.MinecraftServer.t(SourceFile:441)
at bsi.t(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:358)
at kx.run(SourceFile:617)

-- System Details --
Details:
Minecraft Version: 1.7.1
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 70359656 bytes (67 MB) / 220332032 bytes (210 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 1808 (101248 bytes; 0 MB) allocated, 1707 (95592 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Vec3 Pool Size: 429 (24024 bytes; 0 MB) allocated, 403 (22568 bytes; 0 MB) used
Player Count: 1 / 8; [ml['steampunkmage'/161, l='void', x=654.91, y=107.38, z=1038.32]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

I'm using the latest java update for this