1 #![allow(warnings)] 2 #![feature(in_band_lifetimes)] 3 bar<F>(x: &F) where F: Fn(&'a u32)4 fn bar<F>(x: &F) where F: Fn(&'a u32) {} //~ ERROR must be explicitly 5 baz(x: &impl Fn(&'a u32))6 fn baz(x: &impl Fn(&'a u32)) {} //~ ERROR must be explicitly 7 main()8 fn main() {} 9