Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/ui/span/issue-24895-copy-clone-dropck.rs b/tests/ui/span/issue-24895-copy-clone-dropck.rs
new file mode 100644
index 000000000..904cd8f67
--- /dev/null
+++ b/tests/ui/span/issue-24895-copy-clone-dropck.rs
@@ -0,0 +1,29 @@
+// Check that one cannot subvert Drop Check rule via a user-defined
+// Clone implementation.
+
+#![allow(unused_variables, unused_assignments)]
+
+struct D<T:Copy>(T, &'static str);
+
+#[derive(Copy)]
+struct S<'a>(&'a D<i32>, &'static str);
+impl<'a> Clone for S<'a> {
+    fn clone(&self) -> S<'a> {
+        println!("cloning `S(_, {})` and thus accessing: {}", self.1, (self.0).0);
+        S(self.0, self.1)
+    }
+}
+
+impl<T:Copy> Drop for D<T> {
+    fn drop(&mut self) {
+        println!("calling Drop for {}", self.1);
+        let _call = self.0.clone();
+    }
+}
+
+fn main() {
+    let (d2, d1);
+    d1 = D(34, "d1");
+    d2 = D(S(&d1, "inner"), "d2");
+}
+//~^^ ERROR `d1` does not live long enough