pola-rs/polars · error

cannot coerce datatypes

Error message

cannot coerce datatypes

What it means

Error "cannot coerce datatypes" thrown in pola-rs/polars.

Source

Thrown at crates/polars-core/src/series/arithmetic/borrowed.rs:272

            let ca: Float64Chunked =
                arity::binary_elementwise(lhs, rhs, |opt_l, opt_r| match (opt_l, opt_r) {
                    (Some(l), Some(r)) => {
                        if r.is_zero() {
                            None
                        } else {
                            Some(l / r)
                        }
                    },
                    _ => None,
                });
            Ok(ca.into_series())
        }
    }

    impl NumOpsDispatchChecked for Series {
        fn checked_div(&self, rhs: &Series) -> PolarsResult<Series> {
            let (lhs, rhs) = coerce_lhs_rhs(self, rhs).expect("cannot coerce datatypes");
            lhs.as_ref().as_ref().checked_div(rhs.as_ref())
        }

        fn checked_div_num<T: ToPrimitive>(&self, rhs: T) -> PolarsResult<Series> {
            use DataType::*;
            let s = self.to_physical_repr();

            let out = match s.dtype() {
                #[cfg(feature = "dtype-u8")]
                UInt8 => s
                    .u8()
                    .unwrap()
                    .apply(|opt_v| opt_v.and_then(|v| v.checked_div(rhs.to_u8().unwrap())))
                    .into_series(),
                #[cfg(feature = "dtype-i8")]
                Int8 => s
                    .i8()
                    .unwrap()

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at crates/polars-core/src/series/arithmetic/borrowed.rs:272 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pola-rs/polars@df599052da (2026-08-16). Data as JSON: /api/errors/61b16b8b55e344c9. Report an issue: GitHub.