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#![feature(box_syntax)]
struct Foo {
x: isize
}
impl Drop for Foo {
fn drop(&mut self) {
println!("drop {}", self.x);
}
}
fn main() {
let mut ptr: Box<_> = box Foo { x: 0 };
let mut test = |foo: &Foo| {
println!("access {}", foo.x);
ptr = box Foo { x: ptr.x + 1 };
println!("access {}", foo.x);
};
test(&*ptr);
//~^ ERROR: cannot borrow `*ptr` as immutable
}
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