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// ICE Failed to normalize closure with TAIT
// issue: rust-lang/rust#109020
//@ check-pass
#![feature(type_alias_impl_trait)]
use std::marker::PhantomData;
mod foo {
pub type WithEmplacableForFn<'a> = impl super::EmplacableFn + 'a;
fn _constrain(_: &mut ()) -> WithEmplacableForFn<'_> {
()
}
}
use foo::*;
fn with_emplacable_for<'a, F, R>(mut f: F) -> R
where
F: for<'b> FnMut(Emplacable<WithEmplacableForFn<'b>>) -> R,
{
fn with_emplacable_for_inner<'a, R>(
_: &'a (),
_: &mut dyn FnMut(Emplacable<WithEmplacableForFn<'a>>) -> R,
) -> R {
loop {}
}
with_emplacable_for_inner(&(), &mut f)
}
trait EmplacableFn {}
impl EmplacableFn for () {}
struct Emplacable<F>
where
F: EmplacableFn,
{
phantom: PhantomData<F>,
}
fn main() {
with_emplacable_for(|_| {});
}
|
