macOS What did I do and how can I prevent this?

[Macman1993]

So I'm a python noob I was just practicing with concatenating strings and I was also just throwing some escape sequences just to practice what I had done. I don't remember exactly what I typed but it was nothing more then a small text print app I was just making for practice. When I executed this through IDLE everything froze and my computer made a very loud whining noise (sound came from the speakers not the HD) I had to restart my comp so I don't know exactly what I did but it wasn't anything special. Did I manage to make the app of death or was it some weird glitch and if I caused the glitch what can I do to never to that again because that freaked out when my comp suddenly began blasting a whining noise.

 

[HiRez]

There's one way to find out: run the app again. Nowadays with protected memory in operating systems, really nothing should be able to crash your whole machine, but it does happen on occasion.

 

[lee1210]

If you can, you want to do this again. If there's a bug in python or OS X that you can readily reproduce, that's a good thing. No input, no matter what it is, should cause the OS to crash.

-Lee