Can you please open an issue at https://bugs.python.org/ and then post
the link in this thread?
Thanks in advance,
Victor
Le mar. 10 déc. 2019 à 14:18, Christian Tismer <tis...@stackless.com> a écrit :
>
> Hi Łukasz,
>
> tonite I found a critical bug that affects all heaptype extension
> classes with a custom (not PyType_Type) type.
>
> the bug is in typeobject.c function type_mro_modified line 309:
>
> if (custom) {
> _Py_IDENTIFIER(mro);
> mro_meth = lookup_maybe_method(
> (PyObject *)type, &PyId_mro, &unbound);
> if (mro_meth == NULL)
> goto clear;
> Py_INCREF(mro_meth);
> type_mro_meth = lookup_maybe_method(
> (PyObject *)&PyType_Type, &PyId_mro, &unbound);
> if (type_mro_meth == NULL)
> goto clear;
> Py_INCREF(type_mro_meth);
> if (mro_meth != type_mro_meth)
> goto clear;
> Py_XDECREF(mro_meth);
> Py_XDECREF(type_mro_meth);
> }
>
> This block is wrong because it decrefs a value that comes from
> lookup_maybe_method which does not incref.
>
> The code is easily fixed by two Py_INCREF s.
>
> Please let me know how you want to proceed.
> This is a critical error, producing negative refcounts.
>
> Cheers -- Chris
>
>
> On 10.12.19 10:22, Łukasz Langa wrote:
> > Python 3.8.1rc1 is the release candidate of the first maintenance
> > release of Python 3.8.
> >
> > The Python 3.8 series is the newest feature release of the Python
> > language, and it contains many new features and optimizations. You can
> > find Python 3.8.1rc1 here:
> >
> > https://www.python.org/downloads/release/python-381rc1/
> >
> > Assuming no critical problems are found prior to *2019-12-16*, the
> > scheduled release date for *3.8.1* as well as *Ned Deily's birthday*, no
> > code changes are planned between this release candidate and the final
> > release.
> >
> > That being said, please keep in mind that this is a pre-release of 3.8.1
> > and as such its main purpose is testing.
> >
> > See the “What’s New in Python 3.8
> > <https://docs.python.org/3.8/whatsnew/3.8.html>” document for more
> > information about features included in the 3.8 series. Detailed
> > information about all changes made in 3.8.0 can be found in its change log.
> >
> > Maintenance releases for the 3.8 series will continue at regular
> > bi-monthly intervals, with *3.8.2* planned for February 2020.
> >
> >
> > We hope you enjoy Python 3.8!
> >
> > Thanks to all of the many volunteers who help make Python Development
> > and these releases possible! Please consider supporting our efforts by
> > volunteering yourself or through organization contributions to the
> > Python Software Foundation.
> >
> > https://www.python.org/psf/
> >
> >
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>
> --
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