| // 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. |
| |
| // We used to ICE if you had a single match arm with multiple |
| // candidate patterns with `ref mut` identifiers used in the arm's |
| // guard. |
| // |
| // Also, this test expands on the original bug's example by actually |
| // trying to double check that we are matching against the right part |
| // of the input data based on which candidate pattern actually fired. |
| |
| // run-pass |
| |
| #![feature(nll)] |
| |
| fn foo(x: &mut Result<(u32, u32), (u32, u32)>) -> u32 { |
| match *x { |
| Ok((ref mut v, _)) | Err((_, ref mut v)) if *v > 0 => { *v } |
| _ => { 0 } |
| } |
| } |
| |
| fn main() { |
| assert_eq!(foo(&mut Ok((3, 4))), 3); |
| assert_eq!(foo(&mut Err((3, 4))), 4); |
| } |
