Crash when opening debug mode

Minecraft Crash Report ----
// Why did you do that?

Time: 7/2/14 9:58 AM
Description: Ticking memory connection

java.lang.IllegalArgumentException: n must be positive
at java.util.Random.nextInt(Random.java:250)
at ano.a(SourceFile:153)
at ano.a(SourceFile:49)
at anh.a(SourceFile:388)
at aod.a(SourceFile:85)
at bbc.a(SourceFile:475)
at pa.a(SourceFile:181)
at azs.a(SourceFile:878)
at pa.c(SourceFile:110)
at oz.<init>(SourceFile:39)
at oy.a(SourceFile:231)
at oy.a(SourceFile:263)
at qq.a(SourceFile:225)
at qq.c(SourceFile:277)
at qq.a(SourceFile:132)
at pw.b(SourceFile:86)
at pw.c(SourceFile:52)
at fv.a(SourceFile:180)
at pj.c(SourceFile:151)
at net.minecraft.server.MinecraftServer.x(SourceFile:601)
at net.minecraft.server.MinecraftServer.w(SourceFile:511)
at cpr.w(SourceFile:132)
at net.minecraft.server.MinecraftServer.run(SourceFile:427)
at java.lang.Thread.run(Thread.java:695)

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

– Head –
Stacktrace:
at java.util.Random.nextInt(Random.java:250)
at ano.a(SourceFile:153)
at ano.a(SourceFile:49)
at anh.a(SourceFile:388)
at aod.a(SourceFile:85)
at bbc.a(SourceFile:475)
at pa.a(SourceFile:181)
at azs.a(SourceFile:878)
at pa.c(SourceFile:110)
at oz.<init>(SourceFile:39)
at oy.a(SourceFile:231)
at oy.a(SourceFile:263)
at qq.a(SourceFile:225)
at qq.c(SourceFile:277)
at qq.a(SourceFile:132)
at pw.b(SourceFile:86)
at pw.c(SourceFile:52)
at fv.a(SourceFile:180)

– Ticking connection –
Details:
Connection: fv@6b843475
Stacktrace:
at pj.c(SourceFile:151)
at net.minecraft.server.MinecraftServer.x(SourceFile:601)
at net.minecraft.server.MinecraftServer.w(SourceFile:511)
at cpr.w(SourceFile:132)
at net.minecraft.server.MinecraftServer.run(SourceFile:427)
at java.lang.Thread.run(Thread.java:695)

– System Details –
Details:
Minecraft Version: 14w27a
Operating System: Mac OS X (x86_64) version 10.9.3
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 227747608 bytes (217 MB) / 441282560 bytes (420 MB) up to 2130051072 bytes (2031 MB)
JVM Flags: 1 total; -Xmx2G
IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [pe['djimusic'/849, l='Block World', x=1.00, y=75.05, z=75.67]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.