Minecraft has crashed!
      ----------------------

Minecraft has stopped running because it encountered a problem.

If you wish to report this, please copy this entire text and email it to support@mojang.com.
Please include a description of what you did when the error occured.



--- BEGIN ERROR REPORT a1dce528 --------
Generated 30.10.10 23:39

Minecraft: Minecraft Alpha v1.2.0
OS: Windows Vista (x86) version 6.0
Java: 1.7.0-ea, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: ATI Mobility Radeon HD 3650 version 2.1.7415 Release, ATI Technologies Inc.

java.lang.IllegalArgumentException: Comparison method violates its general contract!
    at java.util.TimSort.mergeHi(Unknown Source)
    at java.util.TimSort.mergeAt(Unknown Source)
    at java.util.TimSort.mergeCollapse(Unknown Source)
    at java.util.TimSort.sort(Unknown Source)
    at java.util.TimSort.sort(Unknown Source)
    at java.util.Arrays.sort(Unknown Source)
    at java.util.Collections.sort(Unknown Source)
    at d.a(SourceFile:962)
    at jq.c(SourceFile:372)
    at jq.b(SourceFile:312)
    at net.minecraft.client.Minecraft.run(SourceFile:623)
    at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT fad4b89d ----------