From fbfb620de8afdabddfa819e698cdbfc7a7b10797 Mon Sep 17 00:00:00 2001
From: whtahy <whtahy@users.noreply.github.com>
Date: Tue, 18 Apr 2023 23:11:43 -0400
Subject: [PATCH] add known-bug test for unsound issue 84366

---
 .../static-closures-with-nonstatic-return.rs      | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 tests/ui/closures/static-closures-with-nonstatic-return.rs

diff --git a/tests/ui/closures/static-closures-with-nonstatic-return.rs b/tests/ui/closures/static-closures-with-nonstatic-return.rs
new file mode 100644
index 00000000000..b5f0684bae9
--- /dev/null
+++ b/tests/ui/closures/static-closures-with-nonstatic-return.rs
@@ -0,0 +1,15 @@
+// check-pass
+// known-bug: #84366
+
+// Should fail. Associated types of 'static types should be `'static`, but
+// argument-free closures can be `'static` and return non-`'static` types.
+
+#[allow(dead_code)]
+fn foo<'a>() {
+    let closure = || -> &'a str { "" };
+    assert_static(closure);
+}
+
+fn assert_static<T: 'static>(_: T) {}
+
+fn main() {}