chore: checkpoint before Python removal

vendor/async-trait/tests/ui/unreachable.rs

@@ -0,0 +1,20 @@
+#![deny(warnings)]
+
+use async_trait::async_trait;
+
+#[async_trait]
+pub trait Trait {
+    async fn f() {
+        unimplemented!()
+    }
+}
+
+#[async_trait]
+pub trait TraitFoo {
+    async fn f() {
+        let _y = unimplemented!();
+        let _z = _y;
+    }
+}
+
+fn main() {}