1 files changed, 13 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-20454.rs b/tests/ui/issues/issue-20454.rs
new file mode 100644
index 00000000000..46cae33f102
--- /dev/null
+++ b/tests/ui/issues/issue-20454.rs
@@ -0,0 +1,13 @@
+// check-pass
+#![allow(unused_must_use)]
+use std::thread;
+
+fn _foo() {
+    thread::spawn(move || { // no need for -> ()
+        loop {
+            println!("hello");
+        }
+    }).join();
+}
+
+fn main() {}