pitrou commented on issue #46814:
URL: https://github.com/apache/arrow/issues/46814#issuecomment-3345696573
@mrd0ll4r I'm not sure it's the same thing, but I can reproduce some kind of
data corruption from PyArrow:
```python
>>> from pyarrow import dataset as ds
>>> d =
ds.dataset("/home/antoine/arrow/data/issue_46814/labeler_logs_clean_parquet/")
>>> tab = d.to_table()
>>> tab.num_rows
58766107
>>> tab.validate(full=True)
>>> g = tab.group_by('uri')
>>> grouped = g.aggregate([])
>>> grouped.num_rows
48794031
>>> grouped.validate(full=True)
Traceback (most recent call last):
Cell In[17], line 1
grouped.validate(full=True)
File pyarrow/table.pxi:4253 in pyarrow.lib.Table.validate
check_status(self.table.ValidateFull())
File pyarrow/error.pxi:92 in pyarrow.lib.check_status
raise convert_status(status)
ArrowInvalid: Column 0: In chunk 1023: Invalid: Negative offsets in binary
array
/home/antoine/arrow/dev/cpp/src/arrow/array/validate.cc:168
ValidateBinaryLike(type)
/home/antoine/arrow/dev/cpp/src/arrow/table.cc:196 ValidateMeta()
```
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