I also have a contract like that. They don't sue you, but everything I produce is intellectual property of my employer. Not very useful when working on open so

I also have a contract like that. They don't sue you, but everything I produce is intellectual property of my employer. Not very useful when working on open source, which is why I don't. I argued about this before signing, but this has been in every contract I have ever read and when I argue about this they will always say it is standard practice to include.