28 lines
484 B
Rust
28 lines
484 B
Rust
#![deny(deref_into_dyn_supertrait)]
|
|
|
|
extern crate core;
|
|
|
|
use core::ops::Deref;
|
|
|
|
// issue 89190
|
|
trait A {}
|
|
trait B: A {}
|
|
|
|
impl<'a> Deref for dyn 'a + B {
|
|
//~^ ERROR `(dyn B + 'a)` implements `Deref` with supertrait `A` as target
|
|
//~| WARN this was previously accepted by the compiler but is being phased out;
|
|
|
|
type Target = dyn A;
|
|
fn deref(&self) -> &Self::Target {
|
|
todo!()
|
|
}
|
|
}
|
|
|
|
fn take_a(_: &dyn A) {}
|
|
|
|
fn whoops(b: &dyn B) {
|
|
take_a(b)
|
|
}
|
|
|
|
fn main() {}
|