Borrowing ~fn to &fn leaks

[brson]

Fallout from demoding. This will leave a dangling allocation on the exchange heap.

fn run(f: &fn()) {
    f()
}

fn main() {
    let f: ~fn() = || ();
    run(f);
}

[brson]

Nominating production ready.

[nikomatsakis]

Huh. I'll take a quick look. What should be happening is that f is borrowed by run and freed by main. I thought I fixed this, guess not.

[graydon]

accepted for production ready

[nikomatsakis]

Fix is in PR #6302.

[Aatch]

This has been fixed now it seems.