Hello, today we've found some weird behaviour of array indexing.
Here is the example
Code snippet:

fn foo<'a>(a1: &'a mut Bar, a2: &'a mut Bar)
{
	let a = [a1, a2];
	for i in 0..42
	{
		let index = i % 2;
		//a[i % 2].bar(); //<= error
		a[index].bar(); //<= no error
	}
}

The question is, why is the indexing operator behaves depending on whether we evaluate index in place or not.