mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 22:41:50 +00:00
33 lines
1.2 KiB
Rust
33 lines
1.2 KiB
Rust
// Regression test for #97405.
|
|
// In `good_generic_fn` the param `T` ends up in the substs of closures/generators,
|
|
// but we should be able to prove `<Gen<T> as Iterator>::Item: 'static` without
|
|
// requiring `T: 'static`
|
|
|
|
// edition:2018
|
|
// check-fail
|
|
|
|
fn opaque<F>(_: F) -> impl Iterator { b"".iter() }
|
|
|
|
fn assert_static<T: 'static>(_: T) {}
|
|
|
|
fn good_generic_fn<T>() {
|
|
// Previously, proving `<OpaqueTy<type_of(async {})> as Iterator>::Item: 'static`
|
|
// used to require `T: 'static`.
|
|
assert_static(opaque(async {}).next());
|
|
assert_static(opaque(|| {}).next());
|
|
assert_static(opaque(opaque(async {}).next()).next());
|
|
}
|
|
|
|
|
|
// This should fail because `T` ends up in the upvars of the closure.
|
|
fn bad_generic_fn<T: Copy>(t: T) {
|
|
assert_static(opaque(async move { t; }).next());
|
|
//~^ ERROR the associated type `<impl Iterator as Iterator>::Item` may not live long enough
|
|
assert_static(opaque(move || { t; }).next());
|
|
//~^ ERROR the associated type `<impl Iterator as Iterator>::Item` may not live long enough
|
|
assert_static(opaque(opaque(async move { t; }).next()).next());
|
|
//~^ ERROR the associated type `<impl Iterator as Iterator>::Item` may not live long enough
|
|
}
|
|
|
|
fn main() {}
|