add rust-lang/rust#88446

ices/88446.rs

@@ -0,0 +1,33 @@
+trait Yokeable<'a> {
+    type Output: 'a;
+}
+impl<'a> Yokeable<'a> for () {
+    type Output = ();
+}
+
+trait DataMarker<'data> {
+    type Yokeable: for<'a> Yokeable<'a>;
+}
+impl<'data> DataMarker<'data> for () {
+    type Yokeable = ();
+}
+
+struct DataPayload<'data, M>(&'data M);
+
+impl DataPayload<'static, ()> {
+    pub fn map_project_with_capture<M2, T>(
+        _: for<'a> fn(
+            capture: T,
+            std::marker::PhantomData<&'a ()>,
+        ) -> <M2::Yokeable as Yokeable<'a>>::Output,
+    ) -> DataPayload<'static, M2>
+    where
+        M2: DataMarker<'static>,
+    {
+        todo!()
+    }
+}
+
+fn main() {
+    let _: DataPayload<()> = DataPayload::<()>::map_project_with_capture::<_, &()>(|_, _| todo!());
+}