1 files changed, 49 insertions, 0 deletions
diff --git a/src/test/ui/mir/mir_drop_order.rs b/src/test/ui/mir/mir_drop_order.rs
new file mode 100644
index 000000000..853efb0fe
--- /dev/null
+++ b/src/test/ui/mir/mir_drop_order.rs
@@ -0,0 +1,49 @@
+// run-pass
+// needs-unwind
+// ignore-wasm32-bare compiled with panic=abort by default
+
+use std::cell::RefCell;
+use std::panic;
+
+pub struct DropLogger<'a> {
+    id: usize,
+    log: &'a panic::AssertUnwindSafe<RefCell<Vec<usize>>>
+}
+
+impl<'a> Drop for DropLogger<'a> {
+    fn drop(&mut self) {
+        self.log.0.borrow_mut().push(self.id);
+    }
+}
+
+struct InjectedFailure;
+
+#[allow(unreachable_code)]
+fn main() {
+    let log = panic::AssertUnwindSafe(RefCell::new(vec![]));
+    let d = |id| DropLogger { id: id, log: &log };
+    let get = || -> Vec<_> {
+        let mut m = log.0.borrow_mut();
+        let n = m.drain(..);
+        n.collect()
+    };
+
+    {
+        let _x = (d(0), &d(1), d(2), &d(3));
+        // all borrows are extended - nothing has been dropped yet
+        assert_eq!(get(), vec![]);
+    }
+    // in a let-statement, extended places are dropped
+    // *after* the let result (tho they have the same scope
+    // as far as scope-based borrowck goes).
+    assert_eq!(get(), vec![0, 2, 3, 1]);
+
+    let _ = std::panic::catch_unwind(|| {
+        (d(4), &d(5), d(6), &d(7), panic::panic_any(InjectedFailure));
+    });
+
+    // here, the temporaries (5/7) live until the end of the
+    // containing statement, which is destroyed after the operands
+    // (4/6) on a panic.
+    assert_eq!(get(), vec![6, 4, 7, 5]);
+}