[Python] Segfault when inspecting dataset.Source with invalid file/partitioning

[asfimport]

Getting a segfault with:

In [1]: import pyarrow.dataset as ds                                                                                                                                                                               

In [2]: !touch test_empty.txt                                                                                                                                                                                      

In [3]: source_factory = ds.source("test_empty.txt", partitioning=ds.partitioning(field_names=['a', 'b']))                                                                                                         

In [4]: source_factory.inspect()                                                                                                                                                                                   
Segmentation fault (core dumped)

Didn't yet further investigate what might be the reason (there are several "wrong" things here: it's an empty file, it's not a valid file for the parquet format, the partitioning does not match the files, etc)

Reporter: Joris Van den Bossche / @jorisvandenbossche
Assignee: Francois Saint-Jacques / @fsaintjacques

PRs and other links:

• GitHub Pull Request #6267

_{Note: This issue was originally created as ARROW-7638. Please see the migration documentation for further details.}

[asfimport]

Ben Kietzman / @bkietz:
Issue resolved by pull request 6267
#6267