Ask HN: How are you using engineering interns?

I’ve got a very smart intern with an A+ junior engineer mentality. He’s just like “give me the smallest bugs and let me contribute something to do the codebase”. But I know how this will go… He’ll solve 10 of these things over the summer, and it’s just not worth the onboarding cost when I’m solving 10 of these things a week. I think this is a failure of my imagination more than anything else. Curious if anyone else is struggling with this.