mirror of https://github.com/rust-lang/rust.git
20 lines
896 B
Rust
20 lines
896 B
Rust
// This uses edition 2024 for new lifetime capture rules.
|
|
//@ edition: 2024
|
|
|
|
// The problem here is that the presence of the opaque which captures all lifetimes in scope
|
|
// means that the duplicated `'a` (which I'll call the dupe) is considered to be *early-bound*
|
|
// since it shows up in the output but not the inputs. This is paired with the fact that we
|
|
// were previously setting the name of the dupe to `'_` in the generic param definition, which
|
|
// means that the identity args for the function were `['a#0, '_#1]` even though the lifetime
|
|
// for the dupe should've been `'a#1`. This difference in symbol meant that NLL couldn't
|
|
// actually match the lifetime against the identity lifetimes, leading to an ICE.
|
|
|
|
struct Foo<'a>(&'a ());
|
|
|
|
impl<'a> Foo<'a> {
|
|
fn pass<'a>() -> impl Sized {}
|
|
//~^ ERROR lifetime name `'a` shadows a lifetime name that is already in scope
|
|
}
|
|
|
|
fn main() {}
|