Crash Report:

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 7/24/14 11:06 PM
Description: Tesselating block model

java.lang.IndexOutOfBoundsException: Index: 1, Size: 0
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at csu.b(SourceFile:88)
at chc.a(SourceFile:156)
at cjs.a(SourceFile:254)
at cjs.b(SourceFile:105)
at cjs.a(SourceFile:45)
at cjs.a(SourceFile:35)
at cjq.a(SourceFile:62)
at cmt.b(SourceFile:156)
at cmm.a(SourceFile:71)
at cmm.run(SourceFile:31)
at java.lang.Thread.run(Unknown Source)

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

– Head –
Stacktrace:
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at csu.b(SourceFile:88)
at chc.a(SourceFile:156)
at cjs.a(SourceFile:254)
at cjs.b(SourceFile:105)

– Block model being tesselated –
Details:
Block: minecraft:stone[variant=smooth_andesite]
Block location: World: (148,59,177), Chunk: (at 4,3,1 in 9,11; contains blocks 144,0,176 to 159,255,191), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Using AO: false
Stacktrace:
at cjs.a(SourceFile:45)
at cjs.a(SourceFile:35)

– Block being tesselated –
Details:
Block type: ID #1 (tile.stone // azs)
Block data value: 6 / 0x6 / 0b0110
Block location: World: (148,59,177), Chunk: (at 4,3,1 in 9,11; contains blocks 144,0,176 to 159,255,191), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
at cjq.a(SourceFile:62)
at cmt.b(SourceFile:156)
at cmm.a(SourceFile:71)
at cmm.run(SourceFile:31)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 14w30b
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 44260648 bytes (42 MB) / 356229120 bytes (339 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94

This crash happens every few minutes.