File: builtin-superkinds-self-type.rs

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rustc 1.85.0%2Bdfsg3-1
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// Tests (negatively) the ability for the Self type in default methods
// to use capabilities granted by builtin kinds as supertraits.

use std::sync::mpsc::{channel, Sender};

trait Foo : Sized+Sync+'static {
    fn foo(self, mut chan: Sender<Self>) { }
}

impl <T: Sync> Foo for T { }
//~^ ERROR the parameter type `T` may not live long enough

fn main() {
    let (tx, rx) = channel();
    1193182.foo(tx);
    assert_eq!(rx.recv(), 1193182);
    //~^ ERROR: mismatched types
}