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// ignore-wasm32
// dont-check-compiler-stderr
#![feature(cfg_target_thread_local, thread_local_internals)]
// On platforms *without* `#[thread_local]`, use
// a custom non-`Sync` type to fake the same error.
#[cfg(not(target_thread_local))]
struct Key<T> {
_data: std::cell::UnsafeCell<Option<T>>,
_flag: std::cell::Cell<()>,
}
#[cfg(not(target_thread_local))]
impl<T> Key<T> {
const fn new() -> Self {
Key {
_data: std::cell::UnsafeCell::new(None),
_flag: std::cell::Cell::new(()),
}
}
}
#[cfg(target_thread_local)]
use std::thread::local_impl::Key;
static __KEY: Key<()> = Key::new();
//~^ ERROR `UnsafeCell<Option<()>>` cannot be shared between threads
//~| ERROR cannot be shared between threads safely [E0277]
fn main() {}
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