rustc/tests/ui/traits/const-traits/default-method-body-is-const-same-trait-ck.rs

//@ compile-flags: -Znext-solver
#![feature(const_trait_impl)]

#[const_trait]
pub trait Tr {
    fn a(&self) {}

    fn b(&self) {
        ().a()
        //~^ ERROR the trait bound `(): ~const Tr` is not satisfied
    }
}

impl Tr for () {}

fn main() {}