panic when passing Date column

[MarcoGorelli]

I'm trying to make sense of pyo3-polars in order to write a plugin

I've tried writing the simplest function:

#[polars_expr(output_type=Date)]
fn add_bday(inputs: &[Series]) -> PolarsResult<Series> {
    let ca = inputs[0].date()?;
    Ok(ca.clone().into_series())
}

but I get

thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
  left: `Date32`,
 right: `Int32`', /home/marcogorelli/.cargo/registry/src/index.crates.io-6f17d22bba15001f/polars-core-0.33.2/src/chunked_array/from.rs:166:17

Looking like

let inputs = polars_ffi::import_series_buffer(e, len).unwrap();

might be panicking?

Here's my complete repo, for a reproducible example: https://github.com/MarcoGorelli/my-wip-polars-extension

[MarcoGorelli]

Current workaround: cast to the physical type when initialising the accessor:

https://github.com/MarcoGorelli/polars-business/blob/6a2e8dc0225ad916bc8c26dc34ae2cdca4420791/src/polars_business/polars_business/__init__.py#L12-L13

[ritchie46]

Fixed