On OSX Lion XCode shuts down the MacBook

I have latest OSX Lion with XCode 4.1 on Macbook Pro. As soon as I type some code in XCode, my Screen shuts off and only option I have is to hard reboot my laptop. I have tried software update开发者_开发知识库s to ensure everything is latest. How can I know who is causing this trip and shutoff of the screen and what are my options to fix it?

Check your Console, maybe something is logged to the syslog that will indicate what is causing the shutdown.

Can you use the Macbook longer without running Xcode? Or your machine only shuts down when running Xcode?