src/test/ui/nll/unused-mut-issue-50343.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![feature(nll)]
  12 #![deny(unused_mut)]
  13
  14 fn main() {
  15     vec![(42, 22)].iter().map(|(mut x, _y)| ()).count();
  16     //~^ ERROR: variable does not need to be mutable
  17 }