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---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 6/4/13 6:57 PM
Description: Exception in server tick loop

java.lang.NoSuchMethodError: ix.<init>(Liw;IIZ)V
at iw.getOrCreateChunkWatcher(PlayerManager.java:167)
at iw.a(PlayerManager.java:157)
at iw.a(PlayerManager.java:206)
at gu.a(SourceFile:138)
at gu.c(SourceFile:185)
at gu.a(SourceFile:82)
at bjj.b(SourceFile:73)
at net.minecraft.server.MinecraftServer.r(SourceFile:480)
at net.minecraft.server.MinecraftServer.q(SourceFile:397)
at bjg.q(SourceFile:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:331)
at gp.run(SourceFile:573)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 86052104 bytes (82 MB) / 164397056 bytes (156 MB) up to 259522560 bytes (247 MB)
JVM Flags: 0 total;
AABB Pool Size: 1695 (94920 bytes; 0 MB) allocated, 1620 (90720 bytes; 0 MB) used
Suspicious classes: Config, VersionCheckThread, Reflector, ...[reifnsk.minimap.ReiMinimap, WaypointEntity, MinimapException, ...]
IntCache: cache: 0, tcache: 0, allocated: 2, tallocated: 62
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1651 (92456 bytes; 0 MB) allocated, 1640 (91840 bytes; 0 MB) used
Player Count: 1 / 8; [jc['Minatou'/174, l='Konoha', x=220.07, y=103.04, z=294.05]]
Type: Integrated Server (map_client.txt)
Is Modded: Very likely; Jar signature invalidated