From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:03 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/ui/nll/issue-57265-return-type-wf-check.rs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 tests/ui/nll/issue-57265-return-type-wf-check.rs

(limited to 'tests/ui/nll/issue-57265-return-type-wf-check.rs')

diff --git a/tests/ui/nll/issue-57265-return-type-wf-check.rs b/tests/ui/nll/issue-57265-return-type-wf-check.rs
new file mode 100644
index 000000000..8fb8351ce
--- /dev/null
+++ b/tests/ui/nll/issue-57265-return-type-wf-check.rs
@@ -0,0 +1,24 @@
+use std::any::Any;
+
+#[derive(Debug, Clone)]
+struct S<T: 'static>(T);
+
+// S<&'a T> is in the return type, so we get an implied bound
+// &'a T: 'static
+fn foo<'a, T>(x: &'a T) -> (S<&'a T>, Box<dyn Any + 'static>) {
+    let y = S(x);
+
+    let z = Box::new(y.clone()) as Box<dyn Any + 'static>;
+    (y, z)
+}
+
+fn main() {
+    let x = 5;
+
+    // Check that we require that the argument is of type `&'static String`,
+    // so that the return type is well-formed.
+    let (_, z) = foo(&"hello".to_string());
+    //~^ ERROR temporary value dropped while borrowed
+
+    println!("{:?}", z.downcast_ref::<S<&'static String>>());
+}
-- 
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