[Pkg-rust-maintainers] python-libcst: FTBFS: error: failed to select a version for the requirement `itertools = "^0.13.0"`

[Peter Green]

The itertools issue seems to be just a trivial dependency bump, but the
pyo3 update is a bigger problem. After updating the dependencies,
I got stuck on errors like.

> error[E0425]: cannot find type `PyObject` in crate `pyo3`
>   --> libcst/src/nodes/whitespace.rs:14:35
>    |                                   
> 14 | #[cfg_attr(feature = "py", derive(TryIntoPy))]
>    |                                   ^^^^^^^^^ not found in `pyo3`
>    |
>    = note: this error originates in the derive macro `TryIntoPy` (in Nightly bui
> help: consider importing this struct
>    |
>  6 + use pyo3::ffi::PyObject;
>    |



I've tried adding the import mentioned in the help message but it doesn't
seem to make any difference.