Hacktoberfest 2026: die Issues, die Maintainer für den Oktober markiert haben – offen und einsteigerfreundlich. Hacktoberfest-Issues durchsuchen

[Bug]: invalid signature of int.__new__ and missing signatures for __new__ dunders in extensions

Offen
  • Stimmt etwas nicht?
#1,192 0 Kommentare 0 Reaktionen 0 zugewiesene Personen Auf GitHub ansehen

Maintainer antworten meist innerhalb von 1 Tag

Dieses Issue hat noch niemand übernommen.

Bewertung

Schwierigkeit
4/5
Geschätzter Aufwand
3-5 Tage
Anfängerfreundlichkeit
48/100
Issue-Typ
Bug
Klarheit
Größtenteils klar
Aktivitätsstatus
Aktiv
Tech-Stack
python
Bereich
backend

Rechercherichtung

Start by reproducing the reported inspect.signature results for int.__new__ and gmp.mpz.__new__, then compare them with the expected CPython signatures. The issue does not name implementation files or tests, so locate the code and tests that determine signatures for built-in and extension __new__ methods. Done means both report the generic (*args, **kwargs) signature.

Vom Indexierungsmodell aus dem Issue-Text verfasst.

Beschreibung

bug
Describe the bug

In some sense it's a continuation of #998, but I think it deserves a separate issue.

GraalPy reports int.__new__() signature being <Signature (cls, x, /, base)>. That's just invalid, assuming e.g. that non keyword base argument is supported:

Python 3.13.14 (Thu Sep 17 18:51:21 UTC 2026)
[Graal, Oracle GraalVM, Java 25.0.4.1.1 (amd64)] on 'linux'
Type "help", "copyright", "credits" or "license" for more information.
>>> int('123', 16)
291

Also, in fact - default values for x and base are supported. Unfortunately, such methods can't be expressed by some targeted signature.

In CPython it is generic, <Signature (*args, **kwargs)>, and same for __new__() dunders in extensions (Here signatures in the GraalPy are missing.). Perhaps, GraalPy should do same. (Though note that PyPy3 has behavior similar to the GraalPy, but invalid signature here is <Signature (x=0, base=None, /)>.)

Operating system

Linux

CPU architecture

x86_64

GraalPy version

25.0.4.1.1

JDK version

No response

Context configuration

No response

Steps to reproduce
pip install python-gmp

Python 3.13.14 (Thu Sep 17 18:51:21 UTC 2026)
[Graal, Oracle GraalVM, Java 25.0.4.1.1 (amd64)] on 'linux'
Type "help", "copyright", "credits" or "license" for more information.
>>> import gmp, inspect
>>> inspect.signature(int.__new__)
<Signature (cls, x, /, base)>
>>> inspect.signature(gmp.mpz.__new__)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    inspect.signature(gmp.mpz.__new__)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/sk/graalpy3.13-25.4.4.1.1-linux-amd64/lib/python3.13/inspect.py", line 3399, in signature
    return Signature.from_callable(obj, follow_wrapped=follow_wrapped,
           ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                   globals=globals, locals=locals, eval_str=eval_str)
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/sk/graalpy3.13-25.4.4.1.1-linux-amd64/lib/python3.13/inspect.py", line 3122, in from_callable
    return _signature_from_callable(obj, sigcls=cls,
                                    follow_wrapper_chains=follow_wrapped,
                                    globals=globals, locals=locals, eval_str=eval_str)
  File "/home/sk/graalpy3.13-25.4.4.1.1-linux-amd64/lib/python3.13/inspect.py", line 2615, in _signature_from_callable
    return _signature_from_builtin(sigcls, obj,
                                   skip_bound_arg=skip_bound_arg)
  File "/home/sk/graalpy3.13-25.4.4.1.1-linux-amd64/lib/python3.13/inspect.py", line 2401, in _signature_from_builtin
    raise ValueError("no signature found for builtin {!r}".format(func))
ValueError: no signature found for builtin <built-in method __new__ of type object at 0x42603ed>
Expected behavior
Python 3.16.0a0 (heads/main:ee68f5f46a1, Aug 12 2026, 11:19:39) [GCC 14.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import gmp, inspect
>>> inspect.signature(int.__new__)
<Signature (*args, **kwargs)>
>>> inspect.signature(gmp.mpz.__new__)
<Signature (*args, **kwargs)>
Stack trace
Additional context

No response

Vorherrschende Sprache
Python
Sterne
1.7k
Forks
155
Ø Merge
6 Std. 26 Min.
Gemergte PRs (30 T.)
53

Entwicklungsumgebung

In Codespaces öffnen

Startet den Dev-Container des Projekts im Browser, mit Ihrem eigenen GitHub-Konto.

Erste Schritte

  1. Lesen Sie das ganze Issue und danach den Beitragsleitfaden des Projekts.
  2. Schreiben Sie ins Issue, dass Sie es übernehmen — das erspart doppelte Arbeit.
  3. Forken Sie das Repository und arbeiten Sie in einem Branch.
  4. Öffnen Sie einen Pull Request, der die Issue-Nummer nennt.

Mehr aus oracle/graalpython

Alle Issues in oracle/graalpython

Ähnliche Issues

Weitere Issues zu Python

Neue Issues direkt in Ihr Postfach

Eine kurze Übersicht über anfängerfreundliche GitHub-Issues.