rust/src/test/ui/run-pass/mir/mir-inlining/no-trait-method-issue-40473.rs

// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// compile-flags:-Zmir-opt-level=2
pub trait Foo {
    fn bar(&self) -> usize { 2 }
}

impl Foo for () {
    fn bar(&self) -> usize { 3 }
}

// Test a case where MIR would inline the default trait method
// instead of bailing out. Issue #40473.
fn main() {
    let result = ().bar();
    assert_eq!(result, 3);
}