From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/test/ui/unboxed-closures/unboxed-closure-no-cyclic-sig.rs | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 src/test/ui/unboxed-closures/unboxed-closure-no-cyclic-sig.rs

(limited to 'src/test/ui/unboxed-closures/unboxed-closure-no-cyclic-sig.rs')

diff --git a/src/test/ui/unboxed-closures/unboxed-closure-no-cyclic-sig.rs b/src/test/ui/unboxed-closures/unboxed-closure-no-cyclic-sig.rs
new file mode 100644
index 000000000..9d0aa4132
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closure-no-cyclic-sig.rs
@@ -0,0 +1,9 @@
+// Test that unboxed closures cannot capture their own type.
+//
+// Also regression test for issue #21410.
+
+fn g<F>(_: F) where F: FnOnce(Option<F>) {}
+
+fn main() {
+    g(|_| {  }); //~ ERROR closure/generator type that references itself
+}
-- 
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