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// Check that one cannot subvert Drop Check rule via a user-defined
// Clone implementation.
#![allow(unused_variables, unused_assignments)]
struct D<T:Copy>(T, &'static str);
#[derive(Copy)]
struct S<'a>(&'a D<i32>, &'static str);
impl<'a> Clone for S<'a> {
fn clone(&self) -> S<'a> {
println!("cloning `S(_, {})` and thus accessing: {}", self.1, (self.0).0);
S(self.0, self.1)
}
}
impl<T:Copy> Drop for D<T> {
fn drop(&mut self) {
println!("calling Drop for {}", self.1);
let _call = self.0.clone();
}
}
fn main() {
let (d2, d1);
d1 = D(34, "d1");
d2 = D(S(&d1, "inner"), "d2");
}
//~^^ ERROR `d1` does not live long enough
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