1 files changed, 10 insertions, 0 deletions
diff --git a/third_party/rust/tokio/tests/io_async_read.rs b/third_party/rust/tokio/tests/io_async_read.rs
new file mode 100644
index 0000000000..aaeadfa4c1
--- /dev/null
+++ b/third_party/rust/tokio/tests/io_async_read.rs
@@ -0,0 +1,10 @@
+#![warn(rust_2018_idioms)]
+#![cfg(feature = "full")]
+
+use tokio::io::AsyncRead;
+
+#[test]
+fn assert_obj_safe() {
+    fn _assert<T>() {}
+    _assert::<Box<dyn AsyncRead>>();
+}