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 use std::cell::RefCell;
   8
   9 type Foo = std::cell::RefCell<String>;
  10
  11 #[cfg(target_thread_local)]
  12 #[thread_local]
  13 static __KEY: std::thread::__FastLocalKeyInner<Foo> = std::thread::__FastLocalKeyInner::new();
  14
  15 #[cfg(not(target_thread_local))]
  16 static __KEY: std::thread::__OsLocalKeyInner<Foo> = std::thread::__OsLocalKeyInner::new();
  17
  18 fn __getit(_: Option<&mut Option<RefCell<String>>>) -> std::option::Option<&'static Foo> {
  19     __KEY.get(Default::default) //~ ERROR call to unsafe function is unsafe
  20 }
  21
  22 static FOO: std::thread::LocalKey<Foo> = std::thread::LocalKey::new(__getit);
  23 //~^ ERROR call to unsafe function is unsafe
  24
  25 fn main() {
  26     FOO.with(|foo| println!("{}", foo.borrow()));
  27     std::thread::spawn(|| {
  28         FOO.with(|foo| *foo.borrow_mut() += "foo");
  29     })
  30     .join()
  31     .unwrap();
  32     FOO.with(|foo| println!("{}", foo.borrow()));
  33 }