T doesn't implement Copy but Vec implements IntoIterator, which means you can call into_iter() and get T. (instead of &T that you get from iter() that you can't collect() )
I had to look at the solutions to notice usage of into_iter() and google the difference between it and iter() I was used to.
Not an obvious thing if you're new to the language like I am.
Or just add
Copytrait toT...T doesn't implement Copy but Vec implements IntoIterator, which means you can call into_iter() and get T. (instead of &T that you get from iter() that you can't collect() )
I had to look at the solutions to notice usage of into_iter() and google the difference between it and iter() I was used to.
Not an obvious thing if you're new to the language like I am.
Set up is always like this in Rust katas. Not an issue.