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//@ revisions: old next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[next] compile-flags: -Znext-solver
// A (partial) regression test for #105787
// Using the higher ranked projection hack to prevent us from replacing the projection
// with an inference variable.
trait ToUnit<'a> {
type Unit;
}
struct LocalTy;
impl<'a> ToUnit<'a> for *const LocalTy {
type Unit = ();
}
impl<'a, T: Copy + ?Sized> ToUnit<'a> for *const T {
type Unit = ();
}
trait Overlap<T> {
type Assoc;
}
type Assoc<'a, T> = <*const T as ToUnit<'a>>::Unit;
impl<T> Overlap<T> for T {
type Assoc = usize;
}
impl<T> Overlap<for<'a> fn(&'a (), Assoc<'a, T>)> for T
//~^ ERROR conflicting implementations of trait
where
for<'a> *const T: ToUnit<'a>,
{
type Assoc = Box<usize>;
}
fn foo<T: Overlap<U>, U>(x: T::Assoc) -> T::Assoc {
x
}
fn main() {
foo::<for<'a> fn(&'a (), ()), for<'a> fn(&'a (), ())>(3usize);
//[next]~^ ERROR: cannot normalize
}
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