segfault on vector.filter

[rossmurray]

There's a segfault when running the following code (it compiles fine).

fn main() {
  let v = ~[1,2,3,4];
  let b = v.filter(|&i| i > 1);
}

Changing |&i| i > 1 to |i| *i > 1 does not fix the problem. However, using the vec::filter function instead of the method does not segfault.

Possibly related: #4878

[Thiez]

I think this problem is caused by #4355.

[catamorphism]

I'm pretty sure this is a dup of #4439 -- follow that bug for more news!