Mailman 3 [RELEASE] Python 3.8.1rc1 is now available for testing - python-committers

[RELEASE] Python 3.8.1rc1 is now available for testing

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Łukasz Langa

10 Dec 2019 10 Dec '19

9:22 a.m.

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/ 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/ https://www.python.org/psf/

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Christian Tismer

10 Dec 10 Dec

1:16 p.m.

New subject: [Python-Dev] [RELEASE] Python 3.8.1rc1 is now available for testing

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/

Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-leave@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/IGJ6ZOAO... Code of Conduct: http://python.org/psf/codeofconduct/

-- Christian Tismer :^) tismer@stackless.com Software Consulting : http://www.stackless.com/ Karl-Liebknecht-Str. 121 : https://github.com/PySide 14482 Potsdam : GPG key -> 0xFB7BEE0E phone +49 173 24 18 776 fax +49 (30) 700143-0023

Christian Tismer

1:22 p.m.

New subject: [Python-Dev] [RELEASE] Python 3.8.1rc1 is now available for testing

Sorry, I sent the fixed version. These two incref's are missing!

On 10.12.19 14:16, Christian Tismer wrote:

...

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;

This one

...

    Py_INCREF(mro_meth);
    type_mro_meth = lookup_maybe_method(
        (PyObject *)&PyType_Type, &PyId_mro, &unbound);
    if (type_mro_meth == NULL)
        goto clear;

And this one

...

    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

Łukasz Langa

1:28 p.m.

New subject: [Python-Dev] [RELEASE] Python 3.8.1rc1 is now available for testing

...

On 10 Dec 2019, at 14:16, Christian Tismer tismer@stackless.com wrote:

Please let me know how you want to proceed. This is a critical error, producing negative refcounts.

Is there a BPO issue for this? If not, there should be, let's discuss there. Is this a 3.8 regression?

3.8.1 proper is next Monday, if this fix is handled quickly it will land in 3.8.1.

Christian Tismer

1:57 p.m.

New subject: [Python-Dev] Re: [RELEASE] Python 3.8.1rc1 is now available for testing

On 10.12.19 14:28, Łukasz Langa wrote:

...

...
On 10 Dec 2019, at 14:16, Christian Tismer mailto:tismer@stackless.com> wrote:

Please let me know how you want to proceed. This is a critical error, producing negative refcounts.

Is there a BPO issue for this? If not, there should be, let's discuss there. Is this a 3.8 regression?

3.8.1 proper is next Monday, if this fix is handled quickly it will land in 3.8.1.

Yes, this problem exists since the first 3.8.0 version. I did not create a PR, yet because it took me so long to understand that this time it was really not a PySide problem ;-)

I will try to produce one ASAP.

Victor Stinner

1:34 p.m.

New subject: [Python-Dev] [RELEASE] Python 3.8.1rc1 is now available for testing

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 tismer@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/

Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-leave@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/IGJ6ZOAO... Code of Conduct: http://python.org/psf/codeofconduct/
-- Christian Tismer :^) tismer@stackless.com Software Consulting : http://www.stackless.com/ Karl-Liebknecht-Str. 121 : https://github.com/PySide 14482 Potsdam : GPG key -> 0xFB7BEE0E phone +49 173 24 18 776 fax +49 (30) 700143-0023

python-committers mailing list -- python-committers@python.org To unsubscribe send an email to python-committers-leave@python.org https://mail.python.org/mailman3/lists/python-committers.python.org/ Message archived at https://mail.python.org/archives/list/python-committers@python.org/message/6... Code of Conduct: https://www.python.org/psf/codeofconduct/

-- Night gathers, and now my watch begins. It shall not end until my death.

Christian Tismer

3:44 p.m.

New subject: [Python-Dev] [RELEASE] Python 3.8.1rc1 is now available for testing

Howdy,

I have produced this: https://bugs.python.org/issue39016

No idea if it's correct, doing that too rarely.

Cheers -- Chris

On 10.12.19 14:34, Victor Stinner wrote:

...

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 tismer@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/

Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-leave@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/IGJ6ZOAO... Code of Conduct: http://python.org/psf/codeofconduct/
-- Christian Tismer :^) tismer@stackless.com Software Consulting : http://www.stackless.com/ Karl-Liebknecht-Str. 121 : https://github.com/PySide 14482 Potsdam : GPG key -> 0xFB7BEE0E phone +49 173 24 18 776 fax +49 (30) 700143-0023

python-committers mailing list -- python-committers@python.org To unsubscribe send an email to python-committers-leave@python.org https://mail.python.org/mailman3/lists/python-committers.python.org/ Message archived at https://mail.python.org/archives/list/python-committers@python.org/message/6... Code of Conduct: https://www.python.org/psf/codeofconduct/

Jason R. Coombs

11:47 p.m.

I think I missed the announcement of the cutoff date for 3.8.1; I was hoping to get some bug fixes in for importlib.metadata.https://github.com/python/cpython/pull/17568

These aren’t crucial bugfixes, but it would be nice not to have them linger for months. Would you consider including these, especially as the code changes are pre-vetted in the backport (released 12-01)? Or maybe only if there’s another RC for another reason?

If it’s too disruptive, that’s no big deal. Your call.

Thanks for the release work.

On 10 Dec, 2019, at 04:22, Łukasz Langa mailto:lukasz@langa.pl> 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 3.8https://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!

https://www.python.org/psf/

python-committers mailing list -- python-committers@python.orgmailto:python-committers@python.org To unsubscribe send an email to python-committers-leave@python.orgmailto:python-committers-leave@python.org https://mail.python.org/mailman3/lists/python-committers.python.org/ Message archived at https://mail.python.org/archives/list/python-committers@python.org/message/I... Code of Conduct: https://www.python.org/psf/codeofconduct/

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Christian Tismer
Jason R. Coombs
Victor Stinner
Łukasz Langa

[RELEASE] Python 3.8.1rc1 is now available for testing

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