Can't pass a POD field by value to a &mut self method

[kmcallister]

struct Foo {
    x: uint,
}

impl Foo {
    fn bar(&mut self, x: uint) { }
}

fn main() {
    let mut foo = Foo { x: 0 };
    foo.bar(foo.x);
}

foo.rs:11:13: 11:18 error: cannot use `foo.x` because it was mutably borrowed
foo.rs:11     foo.bar(foo.x);
                      ^~~~~
foo.rs:11:5: 11:8 note: borrow of `foo` occurs here
foo.rs:11     foo.bar(foo.x);
              ^~~
error: aborting due to previous error

This is a regression somewhere between e55f64f and 557b9e7.

[zwarich]

This was d7de4e9. Making this work again is #6268, but for now you can use a let binding.

[alexcrichton]

Closing as a dupe of #6268