error[E0277]: `Rc<i32>` cannot be sent between threads safely
 --> tests/ui/pyclass_send.rs:4:1
  |
4 | #[pyclass]
  | ^^^^^^^^^^ `Rc<i32>` cannot be sent between threads safely
  |
  = help: within `NotThreadSafe`, the trait `Send` is not implemented for `Rc<i32>`, which is required by `SendablePyClass<NotThreadSafe>: pyo3::impl_::pyclass::PyClassThreadChecker<NotThreadSafe>`
  = help: the trait `pyo3::impl_::pyclass::PyClassThreadChecker<T>` is implemented for `SendablePyClass<T>`
note: required because it appears within the type `NotThreadSafe`
 --> tests/ui/pyclass_send.rs:5:8
  |
5 | struct NotThreadSafe {
  |        ^^^^^^^^^^^^^
  = note: required for `SendablePyClass<NotThreadSafe>` to implement `pyo3::impl_::pyclass::PyClassThreadChecker<NotThreadSafe>`
note: required by a bound in `PyClassImpl::ThreadChecker`
 --> src/impl_/pyclass.rs
  |
  |     type ThreadChecker: PyClassThreadChecker<Self>;
  |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `PyClassImpl::ThreadChecker`
  = note: this error originates in the attribute macro `pyclass` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: `Rc<i32>` cannot be sent between threads safely
 --> tests/ui/pyclass_send.rs:4:1
  |
4 | #[pyclass]
  | ^^^^^^^^^^ `Rc<i32>` cannot be sent between threads safely
  |
  = help: within `NotThreadSafe`, the trait `Send` is not implemented for `Rc<i32>`, which is required by `NotThreadSafe: Send`
note: required because it appears within the type `NotThreadSafe`
 --> tests/ui/pyclass_send.rs:5:8
  |
5 | struct NotThreadSafe {
  |        ^^^^^^^^^^^^^
note: required by a bound in `SendablePyClass`
 --> src/impl_/pyclass.rs
  |
  | pub struct SendablePyClass<T: Send>(PhantomData<T>);
  |                               ^^^^ required by this bound in `SendablePyClass`
  = note: this error originates in the attribute macro `pyclass` (in Nightly builds, run with -Z macro-backtrace for more info)