1 files changed, 64 insertions, 0 deletions
diff --git a/tests/ui/rfcs/rfc-2091-track-caller/std-panic-locations.rs b/tests/ui/rfcs/rfc-2091-track-caller/std-panic-locations.rs
new file mode 100644
index 000000000..f11456250
--- /dev/null
+++ b/tests/ui/rfcs/rfc-2091-track-caller/std-panic-locations.rs
@@ -0,0 +1,64 @@
+// run-pass
+// needs-unwind
+// revisions: default mir-opt
+//[mir-opt] compile-flags: -Zmir-opt-level=4
+
+#![allow(unconditional_panic)]
+
+//! Test that panic locations for `#[track_caller]` functions in std have the correct
+//! location reported.
+
+use std::cell::RefCell;
+use std::collections::{BTreeMap, HashMap, VecDeque};
+use std::ops::{Index, IndexMut};
+use std::panic::{AssertUnwindSafe, UnwindSafe};
+
+fn main() {
+    // inspect the `PanicInfo` we receive to ensure the right file is the source
+    std::panic::set_hook(Box::new(|info| {
+        let actual = info.location().unwrap();
+        if actual.file() != file!() {
+            eprintln!("expected a location in the test file, found {:?}", actual);
+            panic!();
+        }
+    }));
+
+    fn assert_panicked(f: impl FnOnce() + UnwindSafe) {
+        std::panic::catch_unwind(f).unwrap_err();
+    }
+
+    let nope: Option<()> = None;
+    assert_panicked(|| nope.unwrap());
+    assert_panicked(|| nope.expect(""));
+
+    let oops: Result<(), ()> = Err(());
+    assert_panicked(|| oops.unwrap());
+    assert_panicked(|| oops.expect(""));
+
+    let fine: Result<(), ()> = Ok(());
+    assert_panicked(|| fine.unwrap_err());
+    assert_panicked(|| fine.expect_err(""));
+
+    let mut small = [0]; // the implementation backing str, vec, etc
+    assert_panicked(move || { small.index(1); });
+    assert_panicked(move || { small[1]; });
+    assert_panicked(move || { small.index_mut(1); });
+    assert_panicked(move || { small[1] += 1; });
+
+    let sorted: BTreeMap<bool, bool> = Default::default();
+    assert_panicked(|| { sorted.index(&false); });
+    assert_panicked(|| { sorted[&false]; });
+
+    let unsorted: HashMap<bool, bool> = Default::default();
+    assert_panicked(|| { unsorted.index(&false); });
+    assert_panicked(|| { unsorted[&false]; });
+
+    let weirdo: VecDeque<()> = Default::default();
+    assert_panicked(|| { weirdo.index(1); });
+    assert_panicked(|| { weirdo[1]; });
+
+    let refcell: RefCell<()> = Default::default();
+    let _conflicting = refcell.borrow_mut();
+    assert_panicked(AssertUnwindSafe(|| { refcell.borrow(); }));
+    assert_panicked(AssertUnwindSafe(|| { refcell.borrow_mut(); }));
+}