1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/editions/async-block-2015.rs b/src/test/ui/editions/async-block-2015.rs
new file mode 100644
index 000000000..3daf4930c
--- /dev/null
+++ b/src/test/ui/editions/async-block-2015.rs
@@ -0,0 +1,30 @@
+async fn foo() {
+//~^ ERROR `async fn` is not permitted in Rust 2015
+//~| NOTE to use `async fn`, switch to Rust 2018 or later
+//~| HELP pass `--edition 2021` to `rustc`
+//~| NOTE for more on editions, read https://doc.rust-lang.org/edition-guide
+
+    let x = async {};
+    //~^ ERROR cannot find struct, variant or union type `async` in this scope
+    //~| NOTE `async` blocks are only allowed in Rust 2018 or later
+    let y = async { //~ NOTE `async` blocks are only allowed in Rust 2018 or later
+        let x = 42;
+        //~^ ERROR expected identifier, found keyword `let`
+        //~| NOTE expected identifier, found keyword
+        //~| HELP pass `--edition 2021` to `rustc`
+        //~| NOTE for more on editions, read https://doc.rust-lang.org/edition-guide
+        42
+    };
+    let z = async { //~ NOTE `async` blocks are only allowed in Rust 2018 or later
+        42
+        //~^ ERROR expected identifier, found `42`
+        //~| NOTE expected identifier
+        //~| HELP pass `--edition 2021` to `rustc`
+        //~| NOTE for more on editions, read https://doc.rust-lang.org/edition-guide
+    };
+    y.await;
+    z.await;
+    x
+}
+
+fn main() {}