1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/async-await/issue-70935-complex-spans.rs b/src/test/ui/async-await/issue-70935-complex-spans.rs
new file mode 100644
index 000000000..48847cdf9
--- /dev/null
+++ b/src/test/ui/async-await/issue-70935-complex-spans.rs
@@ -0,0 +1,28 @@
+// edition:2018
+// revisions: normal drop_tracking
+// [drop_tracking]compile-flags:-Zdrop-tracking
+// #70935: Check if we do not emit snippet
+// with newlines which lead complex diagnostics.
+
+use std::future::Future;
+
+async fn baz<T>(_c: impl FnMut() -> T) where T: Future<Output=()> {
+}
+
+fn foo(tx: std::sync::mpsc::Sender<i32>) -> impl Future + Send {
+    //[normal]~^ ERROR future cannot be sent between threads safely
+    //[drop_tracking]~^^ ERROR `Sender<i32>` cannot be shared between threads
+    async move {
+        baz(|| async{
+            foo(tx.clone());
+        }).await;
+    }
+}
+
+fn bar(_s: impl Future + Send) {
+}
+
+fn main() {
+    let (tx, _rx) = std::sync::mpsc::channel();
+    bar(foo(tx));
+}