ErrLookup › pola-rs/polars
pola-rs/polars
Extremely fast Query Engine for DataFrames, written in Rust · Rust · 2,173 source files
Analyzed at fe841f959e on 2026-09-18. 771 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| data type must be FixedSizeList | panic | error | rust, proc-macro, polars, compile-time, attribute-arguments |
| validity must be equal to the array's length | panic | error | rust, proc-macro, polars, compile-time, function-signature |
| internal error: entered unreachable code | panic | error | arrow, offsets, unreachable, internal-invariant, rust |
| timezone " " cannot be parsed (feature chrono-tz is not… | panic | critical | rust, feature-flag, timezone, chrono-tz, panic |
| Length to be non-zero | panic | error | arrow, offsets, panic, slice-bounds, rust |
| ' ' . Please install using the command `pip install `… | exception | error | python, polars, optional-dependency, modulenotfounderror, installation |
| `read_database` queries require at least | exception | error | polars, version-compatibility, dependency, python |
| data buffer must be cast from | exception | error | polars, interchange-protocol, categorical, allow-copy, copynotallowederror |
| not yet implemented | panic | error | polars, dtype, panic, unimplemented, rust |
| creating extension types not allowed - try setting the… | panic | error | rust, polars, object-dtype, environment-variable |
| `n_chunks` must be a multiple of the number of chunks of… | exception | error | polars, interchange-protocol, chunks, n-chunks, valueerror |
| could not read | panic | error | polars, io, mmap, filesystem, compression, corrupt-file, panic |
| Expecting to be able to downcast into bytes from read… | panic | error | python, io, panic, file-reading |
| sink to Iceberg table with partition field | exception | error | iceberg, partitioning, not-implemented, sink |
| unexpected dtype when deserializing ndjson | panic | error | polars, ndjson, json, schema, dtype, deserialization, panic |
| Wrong DataType | panic | error | rust, proc-macro, polars, compile-time, arity |
| {source}: {path} | error_code | error | rust, io, filesystem, error-wrapping |
| `df` of type does not support the dataframe interchange… | exception | error | polars, from-dataframe, interchange-protocol, typeerror, pandas, pyarrow |
| length to fit in `usize` | panic | error | rust, polars, arrow, ffi, c-data-interface, usize, overflow, panic |
| List offset is too large :/ | panic | error | polars, json, deserialization, list, offset-overflow, panic, fuzzing |
| the truth value of a Series is ambiguous Here are some… | exception | error | python, polars, boolean-ambiguity, operator-misuse |
| The external API has a non-utf8 as format | panic | error | rust, polars, arrow, ffi, c-data-interface, utf8, schema, panic |
| python function failed | panic | error | python, callback, csv, panic, lazyframe |
| didn't expect argument | panic | error | proc-macro, compile-time, kwargs, rust, polars |
| {pre_slice:?} | panic | error | rust, panic, csv, internal-invariant, streaming |
| requires module to be installed | exception | error | python, polars, optional-dependency, modulenotfounderror, installation |
| {}: {path} | exception | error | io, filesystem, rust, path-handling |
| invalid value for POLARS_UPLOAD_CHUNK_SIZE | panic | error | env-var, configuration, panic, polars |
| Iceberg sort order is no longer available | validation | error | iceberg, concurrency, metadata, sink |
| activate 'dtype-array' | panic | error | rust, feature-flags, arrow, cargo |
| cannot override ` . ` with custom namespace | exception | error | python, namespace, naming-collision |
| =" " should be a single byte character or empty, but is… | validation | error | python, csv, validation, arguments |
| data type not supported by the interchange protocol | exception | error | polars, interchange-protocol, dtype, nested-types, valueerror |
| not implemented | panic | error | rust, polars, arrow, decimal256, interval, physical-type, unimplemented, panic |
| didn't recognize attribute | panic | error | proc-macro, compile-time, attribute, rust, polars |
| altair>=5.4.0 is required for `.plot` | exception | error | python, polars, altair, dependency-version, plotting |
| unknown feature flag | exception | error | python, polars, cpu-flags, invalid-argument |
| unrecognized engine | exception | error | polars, excel, invalid-argument-value |
| partition source field | exception | error | iceberg, partitioning, nested-schema, polars |
| not implemented for dtype | panic | error | rust, dtype, arrow, dispatch |
| offset + length overflowed | panic | error | rust, proc-macro, polars, compile-time, parameter-names |
| unsupported data type | exception | error | polars, interchange-protocol, dtype, float16, notimplementederror |
| cannot select elements using Sequence with elements of type | exception | error | polars, series, indexing, type-mismatch |
| table width argument does not fit in u16 | panic | error | rust, polars, formatting, env-var, value-out-of-range |
| activate one of } features | panic | error | cargo-features, csv, schema-inference, polars |
| string buffers must be converted | exception | error | polars, interchange-protocol, string, allow-copy, copynotallowederror |
| accessing ` ` from the top-level `polars` module was… | exception | error | python, polars, deprecation, exceptions, module-attribute |
| `unique` operation not supported for dtype | panic | error | rust, polars, group-by, object-dtype, unsupported-dtype |
| Expected Polars expression or object convertible to one, got | exception | error | polars, python, type-mismatch, groupby |
| ` ` operation not supported for dtype | panic | error | rust, polars, operators, dtype, unsupported-operation |
| `schema_overrides` should be of type list or dict, got | exception | error | python, csv, lazy, type-error |
| cannot use NoopCatalog with | validation | error | iceberg, catalog, configuration, python |
| Invalid time unit ' ' for Datetime. | panic | error | arrow, json-serialization, time-unit, panic |
| non-Categorical/Enum dtype in CategoricalChunkedbuilder | panic | error | polars, categorical, dtype, builder, panic, precondition |
| comparing enums with different FrozenCategories is not… | panic | error | polars, enum, comparison, unsupported-operation |
| Invalid `POLARS_PQ_PREFILTERED_MASK` value | panic | error | polars, parquet, environment-variable, predicate-pushdown, panic, configuration |
| object not supported | panic | error | polars, dtype, panic, unsupported, rust |
| The length of the values must be equal to the last offset… | panic | error | rust, arrow, utf8, offsets, unsafe |
| can't order enums from different FrozenCategories | panic | error | polars, enum, ordering, unsupported-operation |
| -> not supported | panic | critical | avro, arrow, unsupported-dtype, serialization, panic |
| " " comparison not supported for LazyFrame objects | exception | error | python, polars, lazyframe, type-error |
| bytemask must be converted into a bitmask | exception | error | polars, interchange-protocol, bytemask, validity, allow-copy, copynotallowederror |
| activate ' ' feature | panic | error | rust, feature-flags, polars, macro |
| cannot override reserved namespace | exception | error | python, namespace, api-misuse |
| Type does not support logical type | panic | error | arrow, rust, type-mismatch, dtype |
| TODO: map_target = | exception | error | python, polars, udf, not-implemented |
| f"table named not found in sheet " if n_tables else f"no… | exception | error | polars, excel, openpyxl, table-not-found |
| google-auth must be installed to use `CredentialProviderGCP` | exception | error | python, dependency, gcp, import-error |
| offset exceeds usize limits | panic | error | rust, polars, integer-overflow, split, value-out-of-range |
| expected `other` to be a | exception | error | python, type-error, api-misuse |
| invalid or out-of-range datetime | panic | error | arrow, chrono, datetime, out-of-range |
| offset to fit in `usize` | panic | error | rust, polars, arrow, ffi, c-data-interface, offset, usize, panic |
| byte-packed boolean buffer must be converted to bit-packed… | exception | error | polars, interchange-protocol, boolean, bit-packing, allow-copy, copynotallowederror |
| dtype is unknown; consider supplying data-types for all… | panic | error | rust, polars, series, unknown-dtype, internal-invariant-violation |
| failed to update file last accessed time | panic | error | filesystem, file-cache, panic, io |
| unevenly chunked columns must be rechunked | exception | error | polars, interchange-protocol, allow-copy, rechunk, copynotallowederror |
| cross join filter holds no keys | panic | critical | rust, polars, join, panic, invariant |
| the length of ` ` ( ) does not match the length of ` ` ( ) | exception | error | python, polars, length-mismatch, arguments |
| activate 'round_series' feature | panic | error | rust, polars, feature-flags, operators |
| datetime time zone does not match Series timezone | exception | error | python, polars, timezone, datetime-comparison |
| invalid value for POLARS_CLOUD_WRITER_COALESCE_RUN_LENGTH | panic | error | env-var, configuration, panic, cloud-writer |
| comparing categoricals with different Categories is not… | panic | error | polars, categorical, comparison, unsupported-operation |
| object has no attribute | exception | info | python, polars, lazy-import, attributeerror, introspection |
| sink to Iceberg table with | exception | error | iceberg, partitioning, not-implemented, transform |
| can only use timedelta string language with… | panic | error | rust, join, dtype-mismatch, panic |
| in-flight byte budget init must be larger than the… | panic | error | rust, env-var, configuration, panic, cloud-io |
| invalid value for POLARS_FORCE_CSV_INFER_READ_SIZE | panic | error | env-var, configuration, panic, csv |
| Deserialization from JSON not implemented for | panic | error | polars, json, arrow, schema, unsupported-type, deserialization |
| invalid `time_unit`\n\nExpected one of | exception | error | polars, datetime, validation, invalid-value |
| invalid Map dtype in `Series::full_null` | panic | error | rust, polars, dtype, map |
| cannot create String column without an offsets buffer | exception | error | polars, interchange-protocol, string, offsets-buffer, runtimeerror |
| invalid scan args from python dataset resolve | panic | error | |
| `collect_async` is not supported by | exception | error | python, polars, async, not-implemented |
| unable to parse buffer as utf-8 | panic | error | python, io, utf-8, panic, encoding |
| invalid value for POLARS_CLOUD_FOOTER_READ_SIZE | panic | error | env-var, configuration, panic, parquet |
| invalid value for POLARS_PARTITIONED_UPLOAD_CHUNK_SIZE | panic | error | env-var, configuration, panic, polars |
| requires ' ' module to be installed | exception | error | |
| specified column names do not start with 'column_', but… | exception | error | python, csv, schema, validation |
| could not read from input | error_code | error | python, io, file-protocol, invalid-input |
| invalid value for POLARS_INFLIGHT_INIT_BYTE_BUDGET | panic | error | rust, env-var, configuration, panic, cloud-io |