1 files changed, 100 insertions, 0 deletions
diff --git a/src/test/ui/async-await/track-caller/panic-track-caller.rs b/src/test/ui/async-await/track-caller/panic-track-caller.rs
new file mode 100644
index 000000000..118361d6c
--- /dev/null
+++ b/src/test/ui/async-await/track-caller/panic-track-caller.rs
@@ -0,0 +1,100 @@
+// run-pass
+// edition:2021
+// revisions: feat nofeat
+// needs-unwind
+#![feature(async_closure, stmt_expr_attributes)]
+#![cfg_attr(feat, feature(closure_track_caller))]
+
+use std::future::Future;
+use std::panic;
+use std::sync::{Arc, Mutex};
+use std::task::{Context, Poll, Wake};
+use std::thread::{self, Thread};
+
+/// A waker that wakes up the current thread when called.
+struct ThreadWaker(Thread);
+
+impl Wake for ThreadWaker {
+    fn wake(self: Arc<Self>) {
+        self.0.unpark();
+    }
+}
+
+/// Run a future to completion on the current thread.
+fn block_on<T>(fut: impl Future<Output = T>) -> T {
+    // Pin the future so it can be polled.
+    let mut fut = Box::pin(fut);
+
+    // Create a new context to be passed to the future.
+    let t = thread::current();
+    let waker = Arc::new(ThreadWaker(t)).into();
+    let mut cx = Context::from_waker(&waker);
+
+    // Run the future to completion.
+    loop {
+        match fut.as_mut().poll(&mut cx) {
+            Poll::Ready(res) => return res,
+            Poll::Pending => thread::park(),
+        }
+    }
+}
+
+async fn bar() {
+    panic!()
+}
+
+async fn foo() {
+    bar().await
+}
+
+#[track_caller] //[nofeat]~ WARN `#[track_caller]` on async functions is a no-op
+async fn bar_track_caller() {
+    panic!()
+}
+
+async fn foo_track_caller() {
+    bar_track_caller().await
+}
+
+struct Foo;
+
+impl Foo {
+    #[track_caller] //[nofeat]~ WARN `#[track_caller]` on async functions is a no-op
+    async fn bar_assoc() {
+        panic!();
+    }
+}
+
+async fn foo_assoc() {
+    Foo::bar_assoc().await
+}
+
+fn panicked_at(f: impl FnOnce() + panic::UnwindSafe) -> u32 {
+    let loc = Arc::new(Mutex::new(None));
+
+    let hook = panic::take_hook();
+    {
+        let loc = loc.clone();
+        panic::set_hook(Box::new(move |info| {
+            *loc.lock().unwrap() = info.location().map(|loc| loc.line())
+        }));
+    }
+    panic::catch_unwind(f).unwrap_err();
+    panic::set_hook(hook);
+    let x = loc.lock().unwrap().unwrap();
+    x
+}
+
+fn main() {
+    assert_eq!(panicked_at(|| block_on(foo())), 43);
+
+    #[cfg(feat)]
+    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 56);
+    #[cfg(nofeat)]
+    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 52);
+
+    #[cfg(feat)]
+    assert_eq!(panicked_at(|| block_on(foo_assoc())), 69);
+    #[cfg(nofeat)]
+    assert_eq!(panicked_at(|| block_on(foo_assoc())), 64);
+}