The Devil Glitch

I was playing Minecraft singleplayer. I was playing on a Superflat World, and the seed was random. I was building an giant slime totems. I then seen some messages on the chat:

JAVA Exception BAD

error.505.done

 You are done now.

Then my game suddenly crashed. The report was:

JAVA Exception BAD

error.505.done

entity.505: You are done now.

entity.505: You are mine now.

It was really weird. I launched the game again. The title screen background was black. I freaked out. I quited the game. I opened .minecraft and find entity.number.505.log.txt file that I did not see before. It was like this:

java.code.505.command

worldname: Slime Statue on Super Flat World

gamemode: creative

worldtype: superflat

seed: -50566675342322564

I didn't know that would happen. I freaked out and exited the notepad. I reinstalled Minecraft and never touched this version again. It was Minecraft 1.0.Unknown