src/test/ui/panics/panic-handler-flail-wildly.rs

   1 // run-pass
   2 // needs-unwind
   3
   4 #![allow(stable_features)]
   5 #![allow(unused_must_use)]
   6
   7 // ignore-emscripten no threads support
   8
   9 #![feature(std_panic)]
  10
  11 use std::panic;
  12 use std::thread;
  13
  14 fn a() {
  15     panic::set_hook(Box::new(|_| println!("hello yes this is a")));
  16     panic::take_hook();
  17     panic::set_hook(Box::new(|_| println!("hello yes this is a part 2")));
  18     panic::take_hook();
  19 }
  20
  21 fn b() {
  22     panic::take_hook();
  23     panic::take_hook();
  24     panic::take_hook();
  25     panic::take_hook();
  26     panic::take_hook();
  27     panic!();
  28 }
  29
  30 fn c() {
  31     panic::set_hook(Box::new(|_| ()));
  32     panic::set_hook(Box::new(|_| ()));
  33     panic::set_hook(Box::new(|_| ()));
  34     panic::set_hook(Box::new(|_| ()));
  35     panic::set_hook(Box::new(|_| ()));
  36     panic::set_hook(Box::new(|_| ()));
  37     panic!();
  38 }
  39
  40 fn main() {
  41     for _ in 0..10 {
  42         let mut handles = vec![];
  43         for _ in 0..10 {
  44             handles.push(thread::spawn(a));
  45         }
  46         for _ in 0..10 {
  47             handles.push(thread::spawn(b));
  48         }
  49         for _ in 0..10 {
  50             handles.push(thread::spawn(c));
  51         }
  52         for handle in handles {
  53             let _ = handle.join();
  54         }
  55     }
  56 }