Crash "Tesselating block model" (java.lang.IndexOutOfBoundsException @ java.util.ArrayList.rangeCheck)

Nevermind.

I think it's been fixed with the 'b' snapshot.

It has not been fixed in the 'b' snapshot, I get exactly the same exception in 14w30b. It reports my client as being modded (it isn't) so refuses to accept the crash report.

Also get a false report of being modded and the same crash report

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

Time: 7/23/14 12:15 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:111)
	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:111)

-- Block model being tesselated --
Details:
	Block: minecraft:tallgrass[type=tall_grass]
	Block location: World: (184,64,250), Chunk: (at 8,4,10 in 11,15; contains blocks 176,0,240 to 191,255,255), 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 #31 (tile.tallgrass // azz)
	Block data value: 1 / 0x1 / 0b0001
	Block location: World: (184,64,250), Chunk: (at 8,4,10 in 11,15; contains blocks 176,0,240 to 191,255,255), 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 (amd64) version 6.1
	Java Version: 1.7.0_60, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 174446840 bytes (166 MB) / 499646464 bytes (476 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95

I'm having this same crash about "Tesselating block model". Here is the crash-report. Hope it helps.

Same with me, it has the, your minecraft is modded cant accept crash. i was messing around sponge at the time...

That the Launcher is detecting Minecraft as modded is MC-63288

Got the same crash while flying around in creative. =3
You don't need another crash log, do you?

using the 14w30b snapshot

Same happens with me, most often when moving through the jungle.
It was unexplored terrain, I suspect it happens during world generation.

I'll move towards explored terrain and see if it still happens.

The launcher suspects I modded MC (I haven't) and therefor can't send the report directly to Mojang.
If you need more crash reports, I can produce them easily, unfortunately.
This crash makes playing the snapshot impossible, I hope you will push a 'c'.

I got this crash with a repeater and comperator today in less then a minute after each other, please fix, I can't work on my maps like this