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change test to use if black_box(false)

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Pietro Albini 2023-08-07 15:42:24 +02:00
parent d8fb568cf4
commit 409d9946cd
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1 changed files with 6 additions and 14 deletions
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20
tests/ui/panic-handler/weak-lang-item-2.rs
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@ -1,23 +1,15 @@
// run-pass
// aux-build:weak-lang-items.rs
// ignore-emscripten no threads support
// pretty-expanded FIXME #23616
extern crate weak_lang_items as other;
fn main() {
let _ = std::thread::spawn(move || {
// The goal of the test is just to make sure other::foo() is called. Since the function
// panics, it's executed in its own thread. That way, the panic is isolated within the
// thread and wont't affect the overall exit code.
//
// That causes a spurious failures in panic=abort targets though: if the program exits
// before the thread is fully initialized the test will pass, but if the thread gets
// executed first the whole program will abort. Adding a 60 seconds sleep will (hopefully!)
// ensure the program always exits before the thread is executed.
std::thread::sleep(std::time::Duration::from_secs(60));
other::foo()
});
// The goal of the test is just to make sure other::foo() is referenced at link time. Since
// the function panics, to prevent it from running we gate it behind an always-false `if` that
// is not going to be optimized away.
if std::hint::black_box(false) {
other::foo();
}
}