47 lines
840 B
Rust
47 lines
840 B
Rust
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// check-pass
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// known-bug: #49682
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// edition:2021
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// Should fail. Keeping references to thread local statics can result in a
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// use-after-free.
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#![feature(thread_local)]
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::thread;
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#[allow(dead_code)]
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#[thread_local]
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static FOO: AtomicUsize = AtomicUsize::new(0);
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#[allow(dead_code)]
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async fn bar() {}
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#[allow(dead_code)]
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async fn foo() {
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let r = &FOO;
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bar().await;
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r.load(Ordering::SeqCst);
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}
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fn main() {
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// &FOO = 0x7fd1e9cbf6d0
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_ = thread::spawn(|| {
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let g = foo();
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println!("&FOO = {:p}", &FOO);
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g
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})
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.join()
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.unwrap();
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// &FOO = 0x7fd1e9cc0f50
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println!("&FOO = {:p}", &FOO);
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// &FOO = 0x7fd1e9cbf6d0
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thread::spawn(move || {
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println!("&FOO = {:p}", &FOO);
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})
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.join()
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.unwrap();
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}
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