| // Copyright 2017 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. |
| |
| #![allow(unused_variables)] |
| #![allow(unused_imports)] |
| // ignore-wasm32-bare compiled with panic=abort by default |
| |
| // Test that builtin implementations of `Clone` cleanup everything |
| // in case of unwinding. |
| |
| use std::thread; |
| use std::rc::Rc; |
| |
| struct S(Rc<()>); |
| |
| impl Clone for S { |
| fn clone(&self) -> Self { |
| if Rc::strong_count(&self.0) == 7 { |
| panic!("oops"); |
| } |
| |
| S(self.0.clone()) |
| } |
| } |
| |
| fn main() { |
| let counter = Rc::new(()); |
| |
| // Unwinding with tuples... |
| let ccounter = counter.clone(); |
| let result = std::panic::catch_unwind(move || { |
| let _ = ( |
| S(ccounter.clone()), |
| S(ccounter.clone()), |
| S(ccounter.clone()), |
| S(ccounter) |
| ).clone(); |
| }); |
| |
| assert!(result.is_err()); |
| assert_eq!( |
| 1, |
| Rc::strong_count(&counter) |
| ); |
| |
| // ... and with arrays. |
| let ccounter = counter.clone(); |
| let child = std::panic::catch_unwind(move || { |
| let _ = [ |
| S(ccounter.clone()), |
| S(ccounter.clone()), |
| S(ccounter.clone()), |
| S(ccounter) |
| ].clone(); |
| }); |
| |
| assert!(result.is_err()); |
| assert_eq!( |
| 1, |
| Rc::strong_count(&counter) |
| ); |
| } |