Add async fn test for #66695

Author: matthewjasper

src/test/ui/async-await/issues/issue-66695-static-refs.rs

@@ -0,0 +1,24 @@
+// build-pass
+// edition:2018
+
+static A: [i32; 5] = [1, 2, 3, 4, 5];
+
+async fn fun() {
+    let u = A[async { 1 }.await];
+    match A {
+        i if async { true }.await => (),
+        _ => (),
+    }
+}
+
+fn main() {
+    async {
+        let u = A[async { 1 }.await];
+    };
+    async {
+        match A {
+            i if async { true }.await => (),
+            _ => (),
+        }
+    };
+}