Test that async/await compiles with #![no_std]

src/test/ui/async-await/no-std.rs

@@ -0,0 +1,13 @@
+// edition:2018
+// check-pass
+
+#![no_std]
+#![crate_type = "rlib"]
+
+use core::future::Future;
+
+async fn a(f: impl Future) {
+    f.await;
+}
+
+fn main() {}