Astroid crashes on PyPy 3.11: TypeError expected str, got getset_descriptor object

[jerome-jjc]

Bug description

#  pylint fails with PyPy using either astroid 4.0.4 or astroid 4.2.0b3
#  pylint is OK with python 3.14 and both  astroid 4.0.4 or astroid 4.2.0b3

Configuration

(.venv4) PS C:/Users/jerom/PycharmProjects/proj3> python --version
    Python 3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)
    [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

(.venv4) PS C:/Users/jerom/PycharmProjects/proj3> pylint --version
    pylint 4.0.5
    astroid 4.2.0b3
    Python 3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)
    [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

Command used

pylint trivial_code.py

Bug description

When parsing the following a.py:

"""  pylint trivial_code.py
  fails with PyPy, not CPython.
  OK in 3.14

(.venv4) PS C:/Users/jerom/PycharmProjects\proj3> python --version
    Python 3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)
    [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

(.venv4) PS C:/Users/jerom/PycharmProjects\proj3> pylint --version
    pylint 4.0.5
    astroid 4.2.0b3
    Python 3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)
    [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]
"""
import sys
if __name__ == '__main__':
    print( f"#V1 {sys.version=:}")  # V1 sys.version=3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)  [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

Command used

pylint a.py

Pylint output

Traceback (most recent call last):
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\pylint\lint\pylinter.py", line 1012, in get_ast
    return MANAGER.ast_from_file(filepath, modname, source=True)
                   ^^^^^^^^^^^^^
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\astroid\manager.py", line 165, in ast_from_file
    return AstroidBuilder(self).file_build(filepath, modname)
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\astroid\builder.py", line 82, in __init__
    manager.bootstrap()
            ^^^^^^^^^
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\astroid\manager.py", line 432, in bootstrap
    raw_building._astroid_bootstrapping()
                 ^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\astroid\raw_building.py", line 733, in _astroid_bootstrapping
    builder.object_build(klass, _type)
            ^^^^^^^^^^^^
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\astroid\raw_building.py", line 486, in object_build
    member = getattr(obj, alias)
             ^^^^^^^^^^^^^^^^^^^
TypeError: expected str, got getset_descriptor object

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\pylint\lint\pylinter.py", line 745, in _get_asts
    ast_per_fileitem[fileitem] = self.get_ast(
                                      ^^^^^^^
  File "C:\Users\jerom\PycharmProjects\proj3\.venv4\Lib\site-packages\pylint\lint\pylinter.py", line 1034, in get_ast
    raise astroid.AstroidBuildingError(
astroid.exceptions.AstroidBuildingError: Building error when trying to create ast representation of module 'trivial_code'

Expected behavior

No crash.

Pylint version

pylint 4.0.5
astroid 4.2.0b3
Python 3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)
[PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

OS / Environment

win32 (Windows)

Additional dependencies

### Expected behavior

Should work on this simple file 
[pylint-crash-2026-06-08-13-23-49.txt](https://github.com/user-attachments/files/28706116/pylint-crash-2026-06-08-13-23-49.txt)


### Pylint version

```shell
pylint 4.0.5
    astroid 4.2.0b3
    Python 3.11.15 (dc0121776214, Apr 28 2026, 06:06:46)
    [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

OS / Environment

Windows 11 / Pycharm

[jerome-jjc]

here is the code of trivial_code.py :
import sys
if name == 'main':
print( f"#V1 {sys.version=:}") # V1 sys.version=3.11.15 (dc0121776214, Apr 28 2026, 06:06:46) [PyPy 7.3.22 with MSC v.1941 64 bit (AMD64)]

[jerome-jjc]

I might have inadvertently closed the issue. More over the attached file 'pylint-crash-2026-06-08-13-23-49.txt' is the problem description made by Pylint ( not the executed code).

[jerome-jjc]

I might have inadvertently closed the issue. More over the attached file 'pylint-crash-2026-06-08-13-23-49.txt' is the problem description made by Pylint ( not the executed code).

[jerome-jjc]

I reopened it because it was marked as closed : by me unwittingly or someone else I do not know. I have trouble understanding how this works. Moreover I did work on the problem to get the smaller code producing an error and to define conditions of existence , it is Pylint that suggested repeatedly to put an issue. Thank you in advance for any solution.

…

On Wed, 10 Jun 2026 at 13:52, Pierre Sassoulas ***@***.***> wrote: Reopened #11092 <#11092>. — Reply to this email directly, view it on GitHub <#11092?email_source=notifications&email_token=BKOCYYSSNSQ7KIOQLZHJ3YT47FDZTA5CNFSNUABQM5UWIORPF5TWS5BNNB2WEL2JONZXKZKFOZSW45CON52GSZTJMNQXI2LPNYXTENRVG4YTSNZSHA2TPJTSMVQXG33OVRZXIYLUMVPWG2DBNZTWLJLFOZSW45FMMZXW65DFOJPWG3DJMNVQ#event-26571972857>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BKOCYYWN6THEFLWUPLILBBD47FDZTAVCNFSNUABEKJSXA33TNF2G64TZHM2DONRXGEYTENZ3JFZXG5LFHM2DMMJSGYZDEOBYGSQXMAQ> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/BKOCYYVHEBK4Q5K7TBRMTE347FDZTA5CNFSNUABQM5UWIORPF5TWS5BNNB2WEL2JONZXKZKFOZSW45CON52GSZTJMNQXI2LPNYXTENRVG4YTSNZSHA2TPJTSMVQXG33OVRZXIYLUMVPWG2DBNZTWLJLFOZSW45FKMZXW65DFOJPWS33T> and Android <https://github.com/notifications/mobile/android/BKOCYYSNBJPWMKKSNGL3RZ347FDZTA5CNFSNUABQM5UWIORPF5TWS5BNNB2WEL2JONZXKZKFOZSW45CON52GSZTJMNQXI2LPNYXTENRVG4YTSNZSHA2TPJTSMVQXG33OVRZXIYLUMVPWG2DBNZTWLJLFOZSW45FOMZXW65DFOJPWC3TEOJXWSZA>. Download it today! You are receiving this because you modified the open/close state.Message ID: ***@***.***>

[Pierre-Sassoulas]

Thank you for opening the issue following a crash, we'll investigate.