`move` not needed?

[rvignolo]

I believe that there is no need to use move here:

100-exercises-to-learn-rust/exercises/07_threads/02_static/src/lib.rs

Lines 10 to 11 in d347d1f

	let handle1 = thread::spawn(move || slice1.iter().sum::<i32>());
	let handle2 = thread::spawn(move || slice2.iter().sum::<i32>());

What do you think?

Thank you for the tutorial!

[porcelijn]

The lifetimes of slice1 and slice2 are bound to the scope of fn sum(), but the spawned threads might potentially outlive the invocation of sum(). You're correct in noticing they don't do that, here due to the join() a couple of lines later, but the borrow checker cannot proof that, statically.

Though maybe this was fixed in rustc --edition 2024?

🤔