Implicit namespace package leads to autocompleter crash in IPython

[maxalbert]

Versions:

• IPython: 8.31.0
• Jedi: 0.19.2

Given the following directory structure:

$ tree .

.
├── dir1
│   └── foobarpkg
│       └── pkgA
│           └── __init__.py
└── dir2
    └── foobarpkg
        └── pkgB
            └── __init__.py

The following produces an error when trying to use tab completion in step 5:

$ ipython --Completer.debug=True

Python 3.13.1 (main, Dec  3 2024, 17:59:52) [Clang 19.1.5 ]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.31.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import os, sys

In [2]: curdir = os.getcwd()

In [3]: sys.path = [
    os.path.join(curdir, "dir1"),
    os.path.join(curdir, "dir2")
    ]

In [4]: import foobarpkg

In [5]: foobarpkg.<tab>

Error message:

Oops Jedi has crashed, please report a bug with the following:
   ...: """
   ...: argument should be a str or an os.PathLike object where __fspath__ returns a str, not 'NoneType'
   ...: s"""

[maxalbert]

FYI, the bug is triggered inside the method DirectObjectAccess.py__file__ (here).

It is caused by the fact that in the scenario described above, the value of self._obj.__file__ will be None. This in turn causes Path(self._obj.__file__) to throw a TypeError, which is not handled.