Minecraft Forums

Since November 16 whenever I try to launch Minecraft it crashes and I get the crash report pasted below. Oddly I use Minecraft on two iMacs and both began experiencing the same problem at the same time. I use version 1.8 with no mods. Any help on how to get around this? Thanks.

---- Minecraft Crash Report ----
// Oops.

Time: 11/20/14 7:24 PM
Description: Reading NBT data

java.lang.ClassCastException: ce cannot be cast to cd
at bs.d(SourceFile:116)
at wm.c(SourceFile:123)
at wm.a(SourceFile:70)
at so.b(SourceFile:347)
at sq.a(SourceFile:560)
at jc.a(SourceFile:80)
at mp.f(SourceFile:1053)
at gu.a(SourceFile:152)
at gu.a(SourceFile:52)
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:
---------------------------------------------------------------------------------------

-- Corrupt NBT tag --
Details:
Tag type found: STRING
Tag type expected: SHORT
Tag name: id
Stacktrace:
at bs.d(SourceFile:116)
at wm.c(SourceFile:123)
at wm.a(SourceFile:70)
at so.b(SourceFile:347)
at sq.a(SourceFile:560)
at jc.a(SourceFile:80)

-- Entity being loaded --
Details:
Entity Type: null (jc)
Entity ID: 2306
Entity Name: Player
Entity's Exact location: -1584.51, 69.00, 518.37
Entity's Block location: World: (-1585,69,518), Chunk: (at 15,4,6 in -100,32; contains blocks -1600,0,512 to -1585,255,527), Region: (-4,1; contains chunks -128,32 to -97,63, blocks -2048,0,512 to -1537,255,1023)
Entity's Momentum: 0.00, -0.08, 0.00
Stacktrace:
at mp.f(SourceFile:1053)
at gu.a(SourceFile:152)
at gu.a(SourceFile:52)
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)

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Mac OS X (x86_64) version 10.6.8
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 398802512 bytes (380 MB) / 554369024 bytes (528 MB) up to 1069416448 bytes (1019 MB)
JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
AABB Pool Size: 2194 (122864 bytes; 0 MB) allocated, 2194 (122864 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: 281 (15736 bytes; 0 MB) allocated, 281 (15736 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.