When breaking packed ice, intense lag and/or possible crash

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.

After having this issue:

Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

I tried it again (breaking packed ice) but it didn't work this time, but here is a crash report. it may have been something up with the laptop that time.

Minecraft Crash Report ----
// Oops.

Time: 4/11/14 8:20 PM
Description: Manually triggered debug crash

java.lang.Throwable
at ban.p(SourceFile:1405)
at ban.ak(SourceFile:774)
at ban.f(SourceFile:728)
at net.minecraft.client.main.Main.main(SourceFile:148)

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

– Head –
Stacktrace:
at blr.a(SourceFile:289)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [blw['conor184'/323, l='MpServer', x=185.51, y=75.62, z=253.54]]
Chunk stats: MultiplayerChunkCache: 502, 502
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (176,64,244), Chunk: (at 0,4,4 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)
Level time: 2527 game time, 2527 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 71 total; [wd['Bat'/2065, l='MpServer', x=214.08, y=19.63, z=289.98], xj['item.tile.stone'/143, l='MpServer', x=181.56, y=63.13, z=200.47], wd['Bat'/129, l='MpServer', x=156.66, y=27.09, z=296.79], wn['Pig'/128, l='MpServer', x=165.16, y=64.00, z=251.97], wn['Pig'/131, l='MpServer', x=168.50, y=70.00, z=316.50], wn['Pig'/130, l='MpServer', x=165.19, y=76.00, z=283.28], xy['Creeper'/2077, l='MpServer', x=240.50, y=17.00, z=294.50], wn['Pig'/133, l='MpServer', x=174.81, y=74.00, z=319.19], wn['Pig'/132, l='MpServer', x=163.91, y=70.00, z=313.41], xy['Creeper'/2437, l='MpServer', x=252.50, y=17.00, z=209.50], wn['Pig'/134, l='MpServer', x=170.69, y=72.00, z=311.50], ym['Spider'/159, l='MpServer', x=205.03, y=25.00, z=195.22], yk['Skeleton'/3140, l='MpServer', x=246.50, y=28.00, z=277.50], yk['Skeleton'/144, l='MpServer', x=178.69, y=28.22, z=253.31], xy['Creeper'/3141, l='MpServer', x=243.50, y=28.00, z=275.50], xy['Creeper'/3142, l='MpServer', x=241.50, y=28.00, z=275.50], xj['item.tile.stone'/146, l='MpServer', x=181.34, y=72.13, z=248.63], yk['Skeleton'/2993, l='MpServer', x=252.50, y=12.00, z=250.50], wd['Bat'/2063, l='MpServer', x=206.34, y=14.59, z=304.61], yp['Zombie'/2717, l='MpServer', x=250.66, y=17.00, z=207.91], yp['Zombie'/2718, l='MpServer', x=253.50, y=15.00, z=212.50], yk['Skeleton'/168, l='MpServer', x=197.50, y=13.00, z=277.50], yk['Skeleton'/2708, l='MpServer', x=252.50, y=15.00, z=239.50], xy['Creeper'/163, l='MpServer', x=207.50, y=14.00, z=217.50], xj['item.tile.stone'/160, l='MpServer', x=205.44, y=63.13, z=198.50], wr['Squid'/167, l='MpServer', x=202.56, y=60.00, z=209.63], xy['Creeper'/164, l='MpServer', x=206.50, y=14.00, z=218.50], wd['Bat'/190, l='MpServer', x=217.51, y=30.81, z=193.53], wd['Bat'/191, l='MpServer', x=208.76, y=17.74, z=176.45], yk['Skeleton'/2847, l='MpServer', x=227.50, y=19.00, z=289.50], blw['conor184'/323, l='MpServer', x=185.51, y=75.62, z=253.54], xy['Creeper'/201, l='MpServer', x=222.50, y=22.00, z=307.50], wd['Bat'/200, l='MpServer', x=209.22, y=15.05, z=298.88], xy['Creeper'/2505, l='MpServer', x=237.69, y=14.00, z=184.69], yp['Zombie'/2504, l='MpServer', x=237.78, y=15.00, z=183.69], yp['Zombie'/2503, l='MpServer', x=238.69, y=15.00, z=182.75], xj['item.item.slimeball'/737, l='MpServer', x=221.81, y=22.13, z=271.34], ym['Spider'/198, l='MpServer', x=218.72, y=21.00, z=255.28], xj['item.tile.stone'/193, l='MpServer', x=217.56, y=63.13, z=223.44], xy['Creeper'/192, l='MpServer', x=213.03, y=15.00, z=210.38], yp['Zombie'/195, l='MpServer', x=219.69, y=21.00, z=253.91], xy['Creeper'/221, l='MpServer', x=230.50, y=36.00, z=245.50], yp['Zombie'/216, l='MpServer', x=225.56, y=31.00, z=232.06], yp['Zombie'/217, l='MpServer', x=225.25, y=30.00, z=229.63], xy['Creeper'/218, l='MpServer', x=234.50, y=36.00, z=239.50], yp['Zombie'/219, l='MpServer', x=234.50, y=15.00, z=244.09], wd['Bat'/2398, l='MpServer', x=212.76, y=25.00, z=267.77], wn['Pig'/213, l='MpServer', x=238.50, y=64.00, z=191.50], wn['Pig'/214, l='MpServer', x=238.50, y=63.00, z=195.50], wn['Pig'/215, l='MpServer', x=238.50, y=64.00, z=193.50], wd['Bat'/211, l='MpServer', x=232.10, y=12.02, z=186.08], yk['Skeleton'/2776, l='MpServer', x=240.50, y=28.00, z=277.50], wd['Bat'/3023, l='MpServer', x=218.09, y=32.97, z=178.86], wd['Bat'/3021, l='MpServer', x=212.11, y=32.55, z=175.86], xy['Creeper'/3011, l='MpServer', x=218.50, y=22.00, z=291.50], yk['Skeleton'/226, l='MpServer', x=231.53, y=31.00, z=280.13], yk['Skeleton'/2774, l='MpServer', x=233.50, y=28.00, z=272.50], yk['Skeleton'/225, l='MpServer', x=227.09, y=18.00, z=259.44], yp['Zombie'/3012, l='MpServer', x=220.50, y=22.00, z=278.50], yk['Skeleton'/2775, l='MpServer', x=235.50, y=28.00, z=275.50], yk['Skeleton'/224, l='MpServer', x=217.50, y=22.00, z=253.84], xj['item.item.seeds'/2899, l='MpServer', x=214.84, y=63.13, z=223.03], wn['Pig'/118, l='MpServer', x=149.03, y=63.00, z=261.41], wn['Pig'/117, l='MpServer', x=158.50, y=69.00, z=271.50], yp['Zombie'/250, l='MpServer', x=250.50, y=13.00, z=333.50], yk['Skeleton'/248, l='MpServer', x=240.50, y=29.00, z=274.91], yk['Skeleton'/247, l='MpServer', x=242.97, y=28.00, z=277.72], wn['Pig'/244, l='MpServer', x=240.50, y=72.00, z=240.50], wn['Pig'/242, l='MpServer', x=243.19, y=72.00, z=236.34], wn['Pig'/240, l='MpServer', x=245.09, y=72.00, z=236.22], wn['Pig'/241, l='MpServer', x=243.19, y=72.00, z=237.97]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at blr.a(SourceFile:289)
at ban.b(SourceFile:1972)
at ban.f(SourceFile:737)
at net.minecraft.client.main.Main.main(SourceFile:148)

– System Details –
Details:
Minecraft Version: 1.7.8
Operating System: Linux (i386) version 3.2.0-60-generic-pae
Java Version: 1.6.0_30, Sun Microsystems Inc.
Java VM Version: OpenJDK Server VM (mixed mode), Sun Microsystems Inc.
Memory: 190356472 bytes (181 MB) / 318046208 bytes (303 MB) up to 477233152 bytes (455 MB)
JVM Flags: 1 total; -Xmx512M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Launched Version: 1.7.8
LWJGL: 2.9.1
OpenGL: Mesa DRI Intel(R) Sandybridge Mobile x86/MMX/SSE2 GL version 3.0 Mesa 9.0, Intel Open Source Technology Center
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Java Version: 1.6.0_30, Sun Microsystems Inc.

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