marinelay opened a new issue, #51230:
URL: https://github.com/apache/arrow/issues/51230
### Describe the bug, including details regarding any error messages,
version, and platform.
### Summary
Several exposed `flight` wrapper classes and `pyarrow.parquet.ParquetReader`
can be directly constructed without the native state expected by their methods
and properties.
The operations listed below terminate the interpreter with `SIGSEGV` when
used on those objects.
I grouped these cases because multiple operations across both groups fail in
the same uninitialized object state.
I think unsupported direct construction or use before `open()` should raise
a Python exception rather than terminate the process.
### Versions
PyArrow 25.0.1, CPython 3.12.3, Debian 12 x86_64, glibc 2.36.
### Reproducer
Run each operation independently in a fresh process.
```python
import pyarrow.flight as flight
flight.FlightMetadataReader().read()
flight.FlightStreamReader().read_all()
flight.MetadataRecordBatchReader().read_all()
flight.FlightStreamWriter().done_writing()
flight.MetadataRecordBatchWriter().close()
flight.FlightMetadataWriter().write(b"")
flight.ServerCallContext().peer()
```
```python
import pyarrow.parquet as parquet
parquet.ParquetReader().read_all()
parquet.ParquetReader().read_column(0)
parquet.ParquetReader().read_row_group(0)
parquet.ParquetReader().scan_contents()
parquet.ParquetReader().column_name_idx("name")
parquet.ParquetReader().set_batch_size(1)
parquet.ParquetReader().set_use_threads(True)
parquet.ParquetReader().column_paths
parquet.ParquetReader().num_row_groups
parquet.ParquetReader().schema_arrow
```
Each listed operation was recorded as terminating with:
```console
Segmentation fault (core dumped)
```
---
I found these cases while fuzzing Python C extension modules. If separate
reports would be easier to track, I can split them by component.
### Component(s)
Python
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