1 files changed, 49 insertions, 0 deletions
diff --git a/tests/ui/async-await/async-closures/imm-deref-not-lending.rs b/tests/ui/async-await/async-closures/imm-deref-not-lending.rs
new file mode 100644
index 00000000000..bd1197cc636
--- /dev/null
+++ b/tests/ui/async-await/async-closures/imm-deref-not-lending.rs
@@ -0,0 +1,49 @@
+//@ edition: 2021
+
+#![feature(impl_trait_in_bindings)]
+
+struct FooS {
+    precise: i32,
+}
+
+fn ref_inside_mut(f: &mut &FooS) {
+    let x: impl Fn() -> _ = async move || {
+        let y = &f.precise;
+    };
+}
+
+fn mut_inside_ref(f: &&mut FooS) {
+    let x: impl Fn() -> _ = async move || {
+        let y = &f.precise;
+    };
+}
+
+// Expected to fail, no immutable reference here.
+fn mut_ref_inside_mut(f: &mut &mut FooS) {
+    let x: impl Fn() -> _ = async move || {
+        //~^ ERROR async closure does not implement `Fn`
+        let y = &f.precise;
+    };
+}
+
+fn ref_inside_box(f: Box<&FooS>) {
+    let x: impl Fn() -> _ = async move || {
+        let y = &f.precise;
+    };
+}
+
+fn box_inside_ref(f: &Box<FooS>) {
+    let x: impl Fn() -> _ = async move || {
+        let y = &f.precise;
+    };
+}
+
+// Expected to fail, no immutable reference here.
+fn box_inside_box(f: Box<Box<FooS>>) {
+    let x: impl Fn() -> _ = async move || {
+        //~^ ERROR async closure does not implement `Fn`
+        let y = &f.precise;
+    };
+}
+
+fn main() {}