error[E0277]: the trait bound `PyObject: Ungil` is not satisfied in `[closure@$DIR/tests/ui/not_send_auto_trait2.rs:8:26: 10:10]`
   --> tests/ui/not_send_auto_trait2.rs:8:12
    |
8   |           py.allow_threads(|| {
    |  ____________^^^^^^^^^^^^^_-
    | |            |
    | |            within `[closure@$DIR/tests/ui/not_send_auto_trait2.rs:8:26: 10:10]`, the trait `Ungil` is not implemented for `PyObject`
9   | |             println!("{:?}", string);
10  | |         });
    | |_________- within this `[closure@$DIR/tests/ui/not_send_auto_trait2.rs:8:26: 10:10]`
    |
    = note: required because it appears within the type `UnsafeCell<PyObject>`
    = note: required because it appears within the type `PyAny`
    = note: required because it appears within the type `PyString`
    = note: required because it appears within the type `&PyString`
    = note: required because it appears within the type `&&PyString`
    = note: required because it appears within the type `[closure@$DIR/tests/ui/not_send_auto_trait2.rs:8:26: 10:10]`
note: required by a bound in `pyo3::Python::<'py>::allow_threads`
   --> src/marker.rs
    |
    |         F: Ungil + FnOnce() -> T,
    |            ^^^^^ required by this bound in `pyo3::Python::<'py>::allow_threads`