#![feature(impl_trait_in_fn_trait_return)] | |
use std::fmt::Debug; | |
fn a() -> impl Fn(&u8) -> impl Debug + '_ { | |
//~^ ERROR ambiguous `+` in a type | |
//~| ERROR higher kinded lifetime bounds on nested opaque types are not supported yet | |
|x| x | |
//~^ ERROR lifetime may not live long enough | |
} | |
fn b() -> impl Fn() -> impl Debug + Send { | |
//~^ ERROR ambiguous `+` in a type | |
|| () | |
} | |
fn main() {} |