rust/src/test/ui/generator/pattern-borrow.rs

// Copyright 2018 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.

#![feature(generators, rustc_attrs)]

enum Test { A(i32), B, }

fn main() { #![rustc_error] } // rust-lang/rust#49855

fn fun(test: Test) {
    move || {
        if let Test::A(ref _a) = test { //~ ERROR borrow may still be in use when generator yields
            yield ();
        }
    };
}