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#![feature(impl_trait_in_fn_trait_return)]
use std::fmt::Debug;
fn a() -> impl Fn(&u8) -> (impl Debug + '_) {
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|x| x
}
fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|x| x
}
fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
|x| x
}
fn d() -> impl Fn() -> (impl Debug + '_) {
//~^ ERROR missing lifetime specifier
|| ()
}
fn main() {}
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