command block T flip flop (command crash game)

Confirmed.
This is the tile entity data of the command block after running out of memory:

{"extra":[{"translate":"commands.blockdata.success","with":["{Command:\"blockdata ~ ~ ~ {SuccessCount:1} \",id:\"Control\",TrackOutput:1b,LastOutput:\"{\"extra\":[{\"color\":\"red\",\"translate\":\"commands.blockdata.failed\",\"with\":[\"{Command:\\\"blockdata ~ ~ ~ {SuccessCount:1} \\\",id:\\\"Control\\\",TrackOutput:1b,LastOutput:\\\"{\\\"extra\\\":[{\\\"translate\\\":\\\"commands.blockdata.success\\\",\\\"with\\\":[\\\"{Command:\\\\\\\"blockdata ~ ~ ~ {SuccessCount:1} \\\\\\\",id:\\\\\\\"Control\\\\\\\",TrackOutput:1b,LastOutput:\\\\\\\"{\\\\\\\"extra\\\\\\\":[{\\\\\\\"color\\\\\\\":\\\\\\\"red\\\\\\\",\\\\\\\"translate\\\\\\\":\\\\\\\"commands.blockdata.failed\\\\\\\",\\\\\\\"with\\\\\\\":[\\\\\\\"{Command:\\\\\\\\\\\\\\\"blockdata ~ ~ ~ {SuccessCount:1} \\\\\\\\\\\\\\\",id:\\\\\\\\\\\\\\\"Control\\\\\\\\\\\\\\\",TrackOutput:1b,LastOutput:\\\\\\\\\\\\\\\"{\\\\\\\\\\\\\\\"extra\\\\\\\\\\\\\\\":[{\\\\\\\\\\\\\\\"translate\\\\\\\\\\\\\\\":\\\\\\\\\\\\\\\"commands.blockdata.success\\\\\\\\\\\\\\\",\\\\\\\\\\\\\\\"with\\\\\\\\\\\\\\\":[\\\\\\\\\\\\\\\"{Command:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"blockdata ~ ~ ~ {SuccessCount:1} \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\",id:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"Control\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\",TrackOutput:1b,LastOutput:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"{\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"extra\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\":[{\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"color\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\":\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"red\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\",\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"translate\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\":\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"commands.testfor.failure\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\",\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"with\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\":[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"Sheep\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"]}],\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"text\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\":\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"[23:48:44] \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"}\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\",CustomName:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"@\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\",SuccessCount:1,z:4,y:4,x:2,}\\\\\\\\\\\\\\\"]}],\\\\\\\\\\\\\\\"text\\\\\\\\\\\\\\\":\\\\\\\\\\\\\\\"[00:04:45] \\\\\\\\\\\\\\\"}\\\\\\\\\\\\\\\",CustomName:\\\\\\\\\\\\\\\"@\\\\\\\\\\\\\\\",SuccessCount:1,z:4,y:4,x:2,}\\\\\\\"]}],\\\\\\\"text\\\\\\\":\\\\\\\"[00:04:51] \\\\\\\"}\\\\\\\",CustomName:\\\\\\\"@\\\\\\\",SuccessCount:1,z:4,y:4,x:2,}\\\"]}],\\\"text\\\":\\\"[00:04:54] \\\"}\\\",CustomName:\\\"@\\\",SuccessCount:1,z:4,y:4,x:2,}\"]}],\"text\":\"[00:04:56] \"}\",CustomName:\"@\",SuccessCount:1,z:4,y:4,x:2,}"]}],"text":"[00:04:59] "}

This affects very fast and new torchless logic.

See Also MC-49761 Specifically a commandblock setting the SuccessCount on itself leads to an infinite pit of despair.

blockdata ~ ~ ~
{SuccessCount:1}

[22:05:25] Block data updated to: {Command:"blockdata ~ ~ ~ {SuccessCount:1}",id:"Control",TrackOutput:1b,LastOutput:"{"extra":[{"translate":"commands.blockdata.success","with":["{Command:\"blockdata ~ ~ ~ {SuccessCount:1}\",id:\"Control\",TrackOutput:1b,CustomName:\"@\",SuccessCount:1,z:-74,y:1,x:663,}"]}],"text":"[22:05:09] "}",CustomName:"@",SuccessCount:1,z:-74,y:1,x:663,}

So this command and system are dead ? Or is possible to repear .

I can confirm in 14w08a.

@pecker: There is a work-around by applying a blank "LastOutput" tag, or by disabling output tracking:

/blockdata ~ ~ ~ {SuccessCount:1,LastOutput:" "}

/blockdata ~ ~ ~ {SuccessCount:1,TrackOutput:0b}

thank you for having solved this problem.

Apparently this has regressed in 1.8.1-pre5 (MC-74521).

I was testing a similar bug in 1.8.2-pre7 and found this one was active again.

Used 4 command blocks with the commands:

/blockdata 1 65 1 {SuccessCount:0}
/blockdata 1 65 -1 {SuccessCount:0}
/blockdata -1 65 -1 {SuccessCount:0}
/blockdata 1 65 -1 {SuccessCount:0}

3 connected by repeaters with a torch off the 3rd feeding the 4th with redstone dust.

Edit: When reading that crash report noticed I hadn't updated java in awhile. Updated to 1.8.0_31 and crashed it again.