1 files changed, 20 insertions, 0 deletions

diff --git a/src/test/ui/impl-trait/issues/issue-78722.rs b/src/test/ui/impl-trait/issues/issue-78722.rs
new file mode 100644
index 000000000..002e4cde4
--- /dev/null
+++ b/src/test/ui/impl-trait/issues/issue-78722.rs
@@ -0,0 +1,20 @@
+// edition:2018
+
+#![feature(type_alias_impl_trait)]
+
+type F = impl core::future::Future<Output = u8>;
+
+struct Bug {
+    V1: [(); {
+        fn concrete_use() -> F {
+            //~^ ERROR type mismatch
+            async {}
+        }
+        let f: F = async { 1 };
+        //~^ ERROR `async` blocks are not allowed in constants
+        //~| ERROR destructors cannot be evaluated at compile-time
+        1
+    }],
+}
+
+fn main() {}