mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-25 16:24:46 +00:00
27 lines
874 B
Rust
27 lines
874 B
Rust
//@ check-pass
|
|
|
|
// These types were previously considered equal as they are subtypes of each other.
|
|
// This has been changed in #118247 and we now consider them to be disjoint.
|
|
//
|
|
// In our test:
|
|
//
|
|
// * `for<'r> fn(fn(&'r u32))`
|
|
// * `fn(fn(&'a u32)` where `'a` is free
|
|
//
|
|
// These were considered equal as for `'a = 'static` subtyping succeeds in both
|
|
// directions:
|
|
//
|
|
// * `for<'r> fn(fn(&'r u32)) <: fn(fn(&'static u32))`
|
|
// * true if `exists<'r> { 'r: 'static }` (obviously true)
|
|
// * `fn(fn(&'static u32)) <: for<'r> fn(fn(&'r u32))`
|
|
// * true if `forall<'r> { 'static: 'r }` (also true)
|
|
|
|
trait Trait {}
|
|
|
|
impl Trait for for<'r> fn(fn(&'r ())) {}
|
|
impl<'a> Trait for fn(fn(&'a ())) {}
|
|
//~^ WARN conflicting implementations of trait `Trait` for type `for<'r> fn(fn(&'r ()))` [coherence_leak_check]
|
|
//~| WARN the behavior may change in a future release
|
|
|
|
fn main() {}
|