mirror of https://github.com/rust-lang/rust
33 lines
745 B
Rust
33 lines
745 B
Rust
// Ensure that we don't get a cycle error from trying to determine whether an
|
|
// opaque type implements `Freeze` in safety checking, when it doesn't matter.
|
|
|
|
//@ check-pass
|
|
|
|
#![feature(rustc_attrs)]
|
|
|
|
struct AnyValue<T>(T);
|
|
|
|
// No need to check for `Freeze` here, there's no
|
|
// `rustc_layout_scalar_valid_range_start` involved.
|
|
fn not_restricted(c: bool) -> impl Sized {
|
|
if c {
|
|
let x = AnyValue(not_restricted(false));
|
|
&x.0;
|
|
}
|
|
2u32
|
|
}
|
|
|
|
#[rustc_layout_scalar_valid_range_start(1)]
|
|
struct NonZero<T>(T);
|
|
|
|
// No need to check for `Freeze` here, we're not borrowing the field.
|
|
fn not_field(c: bool) -> impl Sized {
|
|
if c {
|
|
let x = unsafe { NonZero(not_field(false)) };
|
|
&x;
|
|
}
|
|
5u32
|
|
}
|
|
|
|
fn main() {}
|