1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/drop/drop-once-on-move.rs b/tests/ui/drop/drop-once-on-move.rs
new file mode 100644
index 00000000000..da018058076
--- /dev/null
+++ b/tests/ui/drop/drop-once-on-move.rs
@@ -0,0 +1,35 @@
+//! Check that types not implementing `Copy` are moved, not copied, during assignment
+//! operations, and their `Drop` implementation is called exactly once when the
+//! value goes out of scope.
+
+//@ run-pass
+
+#![allow(non_camel_case_types)]
+use std::cell::Cell;
+
+#[derive(Debug)]
+struct r<'a> {
+    i: &'a Cell<isize>,
+}
+
+impl<'a> Drop for r<'a> {
+    fn drop(&mut self) {
+        self.i.set(self.i.get() + 1);
+    }
+}
+
+fn r(i: &Cell<isize>) -> r<'_> {
+    r { i }
+}
+
+pub fn main() {
+    let i = &Cell::new(0);
+    // Even though these look like copies, they are guaranteed not to be
+    {
+        let a = r(i);
+        let b = (a, 10);
+        let (c, _d) = b;
+        println!("{:?}", c);
+    }
+    assert_eq!(i.get(), 1);
+}