src/test/ui/threads-sendsync/issue-43733.rs

   1 // revisions: mir thir
   2 // [thir]compile-flags: -Z thir-unsafeck
   3
   4 #![feature(thread_local)]
   5 #![feature(cfg_target_thread_local, thread_local_internals)]
   6
   7 type Foo = std::cell::RefCell<String>;
   8
   9 #[cfg(target_thread_local)]
  10 #[thread_local]
  11 static __KEY: std::thread::__FastLocalKeyInner<Foo> = std::thread::__FastLocalKeyInner::new();
  12
  13 #[cfg(not(target_thread_local))]
  14 static __KEY: std::thread::__OsLocalKeyInner<Foo> = std::thread::__OsLocalKeyInner::new();
  15
  16 fn __getit() -> std::option::Option<&'static Foo> {
  17     __KEY.get(Default::default) //~ ERROR call to unsafe function is unsafe
  18 }
  19
  20 static FOO: std::thread::LocalKey<Foo> = std::thread::LocalKey::new(__getit);
  21 //~^ ERROR call to unsafe function is unsafe
  22
  23 fn main() {
  24     FOO.with(|foo| println!("{}", foo.borrow()));
  25     std::thread::spawn(|| {
  26         FOO.with(|foo| *foo.borrow_mut() += "foo");
  27     })
  28     .join()
  29     .unwrap();
  30     FOO.with(|foo| println!("{}", foo.borrow()));
  31 }