Add a regression test for issue 129865

tests/ui/traits/next-solver/normalize/normalize-const-in-async-body.rs

@@ -0,0 +1,14 @@
+//@ compile-flags: -Znext-solver
+//@ check-pass
+//@ edition:2021
+
+pub async fn cleanse_old_array_async(_: &[u8; BUCKET_LEN]) {}
+
+pub const BUCKET_LEN: usize = 0;
+
+pub fn cleanse_old_array_async2() -> impl std::future::Future {
+    let x: [u8; 0 + 0] = [];
+    async move { let _ = x; }
+}
+
+fn main() {}