---- Minecraft Crash Report ----
// Who set us up the TNT?
Time: 5/29/13 8:52 PM
Description: Ticking entity
java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:2734)
at java.util.ArrayList.ensureCapacity(ArrayList.java:167)
at java.util.ArrayList.add(ArrayList.java:351)
at asg.a(SourceFile:28)
at abb.a(SourceFile:782)
at abb.a(SourceFile:689)
at abb.a(SourceFile:1581)
at aaw.a(SourceFile:114)
at je.a(SourceFile:700)
at abb.a(SourceFile:1557)
at sk.d(SourceFile:85)
at sk.k_(SourceFile:75)
at abb.a(SourceFile:1351)
at je.a(SourceFile:510)
at abb.g(SourceFile:1329)
at abb.h(SourceFile:1236)
at je.h(SourceFile:394)
at net.minecraft.server.MinecraftServer.s(SourceFile:473)
at net.minecraft.server.MinecraftServer.r(SourceFile:408)
at bib.r(SourceFile:125)
at net.minecraft.server.MinecraftServer.run(SourceFile:342)
at gu.run(SourceFile:585)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at java.util.Arrays.copyOf(Arrays.java:2734)
at java.util.ArrayList.ensureCapacity(ArrayList.java:167)
at java.util.ArrayList.add(ArrayList.java:351)
at asg.a(SourceFile:28)
at abb.a(SourceFile:782)
at abb.a(SourceFile:689)
at abb.a(SourceFile:1581)
at aaw.a(SourceFile:114)
at je.a(SourceFile:700)
at abb.a(SourceFile:1557)
at sk.d(SourceFile:85)
at sk.k_(SourceFile:75)
at abb.a(SourceFile:1351)
at je.a(SourceFile:510)
at abb.g(SourceFile:1329)
-- Entity being ticked --
Details:
Entity Type: PrimedTnt (sk)
Entity ID: 18261
Entity Name: Block of TNT
Entity's Exact location: 234.79, 54.83, -122.06
Entity's Block location: World: (234,54,-123), Chunk: (at 10,3,5 in 14,-8; contains blocks 224,0,-128 to 239,255,-113), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Entity's Momentum: 0.19, 0.09, -0.25
Stacktrace:
at abb.h(SourceFile:1236)
at je.h(SourceFile:394)
-- Affected level --
Details:
Level name: New World
All players: 1 total; [jh['[retracted]'/0, l='New World', x=272.81, y=84.74, z=-97.10]]
Chunk stats: ServerChunkCache: 583 Drop: 0
Level seed: 9120205630924841879
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (295,56,-117), Chunk: (at 7,3,11 in 18,-8; contains blocks 288,0,-128 to 303,255,-113), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 3293 game time, 3293 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 148535 (now: false), thunder time: 91533 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.s(SourceFile:473)
at net.minecraft.server.MinecraftServer.r(SourceFile:408)
at bib.r(SourceFile:125)
at net.minecraft.server.MinecraftServer.run(SourceFile:342)
at gu.run(SourceFile:585)
-- System Details --
Details:
Minecraft Version: 13w21b
Operating System: Mac OS X (x86_64) version 10.8.3
Java Version: 1.6.0_45, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 133617616 bytes (127 MB) / 1069416448 bytes (1019 MB) up to 1069416448 bytes (1019 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 103471 (5794376 bytes; 5 MB) allocated, 19269 (1079064 bytes; 1 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 17176655 (961892680 bytes; 917 MB) allocated, 17176655 (961892680 bytes; 917 MB) used
Player Count: 1 / 8; [jh['[retracted]'/0, l='New World', x=272.81, y=84.74, z=-97.10]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
Related issues
Comments

Can you plz put this bug i have a big bag my fps keep droping from 60 to 0 and then crash.Plz report this i can't because my phone is not that good so yeah.And this version is 1.5.2.
no fix for you, sir XD jk
You say 1.5.2 in the comments, but 13w21b in the description, why

Increase the memory. Launcher -> Profile Editor -> Edit Profile -> JVM Arguments -> Change -Xmx1G to -Xmx2G (or higher)

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
No answer, assuming no longer an issue.
How many blocks of TNT dd you place ?