// Copyright 2016 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![feature(collections)] extern crate collections; //~^ NOTE previous import of `collections` here mod collections { //~^ ERROR `collections` has already been imported in this module [E0260] //~| NOTE `collections` already imported pub trait MyTrait { fn do_something(); } } fn main() {}