1 files changed, 30 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-3609.rs b/src/test/ui/issues/issue-3609.rs
new file mode 100644
index 000000000..57ff12a08
--- /dev/null
+++ b/src/test/ui/issues/issue-3609.rs
@@ -0,0 +1,30 @@
+// check-pass
+#![allow(unused_must_use)]
+#![allow(dead_code)]
+#![allow(unused_mut)]
+use std::thread;
+use std::sync::mpsc::Sender;
+
+type RingBuffer = Vec<f64> ;
+type SamplesFn = Box<dyn FnMut(&RingBuffer) + Send>;
+
+enum Msg
+{
+    GetSamples(String, SamplesFn), // sample set name, callback which receives samples
+}
+
+fn foo(name: String, samples_chan: Sender<Msg>) {
+    thread::spawn(move|| {
+        let mut samples_chan = samples_chan;
+
+        let callback: SamplesFn = Box::new(move |buffer| {
+            for i in 0..buffer.len() {
+                println!("{}: {}", i, buffer[i])
+            }
+        });
+
+        samples_chan.send(Msg::GetSamples(name.clone(), callback));
+    }).join();
+}
+
+pub fn main() {}