1 files changed, 8 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-23491.rs b/tests/ui/issues/issue-23491.rs
new file mode 100644
index 000000000..e5f9dd3ef
--- /dev/null
+++ b/tests/ui/issues/issue-23491.rs
@@ -0,0 +1,8 @@
+// run-pass
+#![allow(unused_variables)]
+
+struct Node<T: ?Sized>(#[allow(unused_tuple_struct_fields)] T);
+
+fn main() {
+    let x: Box<Node<[isize]>> = Box::new(Node([]));
+}