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-20971.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 tests/ui/issues/issue-20971.rs

(limited to 'tests/ui/issues/issue-20971.rs')

diff --git a/tests/ui/issues/issue-20971.rs b/tests/ui/issues/issue-20971.rs
new file mode 100644
index 000000000..2e1041817
--- /dev/null
+++ b/tests/ui/issues/issue-20971.rs
@@ -0,0 +1,23 @@
+// Regression test for Issue #20971.
+
+// run-fail
+// error-pattern:Hello, world!
+// ignore-emscripten no processes
+
+pub trait Parser {
+    type Input;
+    fn parse(&mut self, input: <Self as Parser>::Input);
+}
+
+impl Parser for () {
+    type Input = ();
+    fn parse(&mut self, input: ()) {}
+}
+
+pub fn many() -> Box<dyn Parser<Input = <() as Parser>::Input> + 'static> {
+    panic!("Hello, world!")
+}
+
+fn main() {
+    many().parse(());
+}
-- 
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