fail-parent-child.rs

struct Parent;

impl Parent {
    fn new_child<'a>(&'a self) -> Child<'a> {
        Child {
            parent: self
        }
    }
}

struct Child<'self> {
    parent: &'self Parent
}
impl<'self> Child<'self> {
    fn foo(&self) {}
}

fn main() {
    let child;
    {
        let parent = Parent;
        child = parent.new_child();
    }

    child.foo();
}

gistfile1.txt

-> % rustc test.rs
test.rs:22:16: 22:22 error: borrowed value does not live long enough
test.rs:22         child = parent.new_child();
                           ^~~~~~
test.rs:18:10: 26:1 note: borrowed pointer must be valid for the block at 18:10...
test.rs:18 fn main() {
test.rs:19     let child;
test.rs:20     {
test.rs:21         let parent = Parent;
test.rs:22         child = parent.new_child();
test.rs:23     }
           ...
test.rs:20:4: 23:5 note: ...but borrowed value is only valid for the block at 20:4
test.rs:20     {
test.rs:21         let parent = Parent;
test.rs:22         child = parent.new_child();
test.rs:23     }
error: aborting due to previous error