pyo3 0.17.1

Bindings to Python interpreter
Documentation 
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error[E0277]: the trait bound `PyAny: Ungil` is not satisfied in `[closure@$DIR/tests/ui/send_wrapper.rs:11:26: 11:28]`
   --> tests/ui/send_wrapper.rs:11:26
    |
11  |           py.allow_threads(|| {
    |              ------------- ^-
    |              |             |
    |  ____________|_____________within this `[closure@$DIR/tests/ui/send_wrapper.rs:11:26: 11:28]`
    | |            |
    | |            required by a bound introduced by this call
12  | |             let smuggled: &PyString = *wrapped;
13  | |             println!("{:?}", smuggled);
14  | |         });
    | |_________^ within `[closure@$DIR/tests/ui/send_wrapper.rs:11:26: 11:28]`, the trait `Ungil` is not implemented for `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 `*mut &PyString`
    = note: required because it appears within the type `SendWrapper<&PyString>`
    = note: required because it appears within the type `&SendWrapper<&PyString>`
note: required because it's used within this closure
   --> tests/ui/send_wrapper.rs:11:26
    |
11  |         py.allow_threads(|| {
    |                          ^^
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`