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//@ run-pass
use std::marker::PhantomData;
// rust-lang/rust#78174: ICE: "cannot convert ReErased to a region vid"
fn issue_78174() {
let foo = const { "foo" };
assert_eq!(foo, "foo");
}
pub struct InvariantRef<'a, T: ?Sized>(&'a T, PhantomData<&'a mut &'a T>);
impl<'a, T: ?Sized> InvariantRef<'a, T> {
pub const fn new(r: &'a T) -> Self {
InvariantRef(r, PhantomData)
}
}
fn get_invariant_ref<'a>() -> InvariantRef<'a, ()> {
const { InvariantRef::<'a, ()>::new(&()) }
}
fn get_invariant_ref2<'a>() -> InvariantRef<'a, ()> {
// Try some type inference
const { InvariantRef::new(&()) }
}
fn main() {
issue_78174();
get_invariant_ref();
get_invariant_ref2();
}
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