Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-25549-multiple-drop.rs b/src/test/ui/issues/issue-25549-multiple-drop.rs
new file mode 100644
index 000000000..25a2da707
--- /dev/null
+++ b/src/test/ui/issues/issue-25549-multiple-drop.rs
@@ -0,0 +1,33 @@
+// run-pass
+#![allow(unused_variables)]
+struct Foo<'r>(&'r mut i32);
+
+impl<'r> Drop for Foo<'r> {
+    fn drop(&mut self) {
+        *self.0 += 1;
+    }
+}
+
+trait Trait {}
+impl<'r> Trait for Foo<'r> {}
+
+struct Holder<T: ?Sized>(T);
+
+fn main() {
+    let mut drops = 0;
+
+    {
+        let y = &Holder([Foo(&mut drops)]) as &Holder<[Foo]>;
+        // this used to cause an extra drop of the Foo instance
+        let x = &y.0;
+    }
+    assert_eq!(1, drops);
+
+    drops = 0;
+    {
+        let y = &Holder(Foo(&mut drops)) as &Holder<dyn Trait>;
+        // this used to cause an extra drop of the Foo instance
+        let x = &y.0;
+    }
+    assert_eq!(1, drops);
+}