output.txt

tmp.rs:8:9: 8:13 error: `copy` does not live long enough
tmp.rs:8         copy.walk(|a| callback(a));
                 ^~~~
tmp.rs:6:45: 9:6 note: reference must be valid for the lifetime 'a as defined on the block at 6:44...
tmp.rs:6     fn walk(&'a self, callback: |&Aaa<'a>|) {
tmp.rs:7         let copy = Aaa { dummy: self.dummy };
tmp.rs:8         copy.walk(|a| callback(a));
tmp.rs:9     }
tmp.rs:6:45: 9:6 note: ...but borrowed value is only valid for the block at 6:44
tmp.rs:6     fn walk(&'a self, callback: |&Aaa<'a>|) {
tmp.rs:7         let copy = Aaa { dummy: self.dummy };
tmp.rs:8         copy.walk(|a| callback(a));
tmp.rs:9     }
error: aborting due to previous error

tmp.rs

struct Aaa<'a> {
    dummy: &'a u32,
}

impl<'a> Aaa<'a> {
    fn walk(&'a self, callback: |&Aaa<'a>|) {
        let copy = Aaa { dummy: self.dummy };
        copy.walk(|a| callback(a));
    }
}