1 files changed, 34 insertions, 0 deletions
diff --git a/tests/run-pass-valgrind/cast-enum-with-dtor.rs b/tests/run-pass-valgrind/cast-enum-with-dtor.rs
new file mode 100644
index 000000000..f7ef92df8
--- /dev/null
+++ b/tests/run-pass-valgrind/cast-enum-with-dtor.rs
@@ -0,0 +1,34 @@
+#![allow(dead_code, cenum_impl_drop_cast)]
+
+// check dtor calling order when casting enums.
+
+use std::sync::atomic;
+use std::sync::atomic::Ordering;
+use std::mem;
+
+enum E {
+    A = 0,
+    B = 1,
+    C = 2
+}
+
+static FLAG: atomic::AtomicUsize = atomic::AtomicUsize::new(0);
+
+impl Drop for E {
+    fn drop(&mut self) {
+        // avoid dtor loop
+        unsafe { mem::forget(mem::replace(self, E::B)) };
+
+        FLAG.store(FLAG.load(Ordering::SeqCst)+1, Ordering::SeqCst);
+    }
+}
+
+fn main() {
+    assert_eq!(FLAG.load(Ordering::SeqCst), 0);
+    {
+        let e = E::C;
+        assert_eq!(e as u32, 2);
+        assert_eq!(FLAG.load(Ordering::SeqCst), 1);
+    }
+    assert_eq!(FLAG.load(Ordering::SeqCst), 1);
+}