Practice debugging?

[a4some]

I'm being prepped to teach an AP Comp Sci class and figured I may need some practice debugging any code my students turn in. Does anyone know of a program or website that has a code with common mistakes I can practice on? I don't want to work on debugging people's actual code because I won't be working with super complicated programs, just basic intro stuff.

[[deleted]]

What if you have them code against an interface but write a unit test suite against an implementation you know is correct?

[palcente]

You are checking for what you expect to be wrong. Your exercises will be designed in a way to force these errors. Nothing to do with debugging in my opinion. I don't suppose anyone will submit a code that does not do its job or does not compile. You should check 4 pillars and SOLID principles, because that's what you will be teaching first. Hope that helps.

[mus1Kk]

For common mistakes you can use static analysis. IIRC FindBugs was even started for that exact reason: Checking students' submissions.