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/issues/issue-57156.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 tests/ui/issues/issue-57156.rs

(limited to 'tests/ui/issues/issue-57156.rs')

diff --git a/tests/ui/issues/issue-57156.rs b/tests/ui/issues/issue-57156.rs
new file mode 100644
index 000000000..9f5ec9f27
--- /dev/null
+++ b/tests/ui/issues/issue-57156.rs
@@ -0,0 +1,23 @@
+// check-pass
+
+trait Foo<Args> {
+    type Output;
+}
+
+trait Bar<'a, T>: for<'s> Foo<&'s T, Output=bool> {
+    fn cb(&self) -> Box<dyn Bar<'a, T, Output=bool>>;
+}
+
+impl<'s> Foo<&'s ()> for () {
+    type Output = bool;
+}
+
+impl<'a> Bar<'a, ()> for () {
+    fn cb(&self) -> Box<dyn Bar<'a, (), Output=bool>> {
+        Box::new(*self)
+    }
+}
+
+fn main() {
+    let _t = ().cb();
+}
-- 
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