// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![feature(tool_lints)] #![warn(clippy::builtin_type_shadow)] fn foo(a: u32) -> u32 { 42 // ^ rustc's type error } fn main() { }