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Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))

Started by	Lucas Nussbaum <lucas@debian.org>
First post	2020-06-24 23:00 +0200
Last post	2020-08-23 16:40 +0200
Articles	3 — 3 participants

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  Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py)) Lucas Nussbaum <lucas@debian.org> - 2020-06-24 23:00 +0200
    Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py)) Ben Hutchings <ben@decadent.org.uk> - 2020-08-23 16:40 +0200
    Processed: Re: Bug#963636: linux: FTBFS with Sphinx 3.1: Could  not import extension cdomain (exception: cannot import name  'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-08-23 16:40 +0200

#67371 — Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))

From	Lucas Nussbaum <lucas@debian.org>
Date	2020-06-24 23:00 +0200
Subject	Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Message-ID	<AlkEV-8fP-1@gated-at.bofh.it>

Source: linux
Version: 5.6.14-2
Severity: important
Tags: ftbfs
User: python-modules-team@lists.alioth.debian.org
Usertags: sphinx3.1

Hi,

linux fails to build with Sphinx 3.1, currently available in
experimental.

Relevant part (hopefully):
> make[3]: Entering directory '/<<PKGBUILDDIR>>/debian/build/build-doc'
> /usr/bin/make -f ./scripts/Makefile.build obj=Documentation xmldocs
>   /usr/bin/make BUILDDIR=/<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output -f ./scripts/Makefile.build obj=Documentation/media xml && PYTHONDONTWRITEBYTECODE=1 BUILDDIR=/<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output SPHINX_CONF=/<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/conf.py python3 ./scripts/jobserver-exec /bin/sh ./Documentation/sphinx/parallel-wrapper.sh sphinx-build -b xml -c /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation -d /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/.doctrees -D version=5.6.14 -D release= -D kerneldoc_srctree=. -D kerneldoc_bin=./scripts/kernel-doc   /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/xml
> mkdir -p /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/audio.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/audio.h.rst ./Documentation/media/audio.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/ca.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/ca.h.rst ./Documentation/media/ca.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/dmx.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/dmx.h.rst ./Documentation/media/dmx.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/frontend.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/frontend.h.rst ./Documentation/media/frontend.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/net.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/net.h.rst ./Documentation/media/net.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/dvb/video.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/video.h.rst ./Documentation/media/video.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/videodev2.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/videodev2.h.rst ./Documentation/media/videodev2.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/media.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/media.h.rst ./Documentation/media/media.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/cec.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/cec.h.rst ./Documentation/media/cec.h.rst.exceptions
> ./Documentation/sphinx/parse-headers.pl include/uapi/linux/lirc.h /<<PKGBUILDDIR>>/debian/build/build-doc/Documentation/output/lirc.h.rst ./Documentation/media/lirc.h.rst.exceptions
> Running Sphinx v3.1.1
> 
> Extension error:
> Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
> make[4]: *** [Documentation/Makefile:110: xmldocs] Error 2

The full build log is available from:
   http://qa-logs.debian.net/2020/06/23/linux_5.6.14-2_unstable_sphinx-exp.log

Please see [1] for Sphinx changelog, which may give a hint of what changes in
Sphinx caused this error.

Also see [2] for the list of deprecated/removed APIs and possible alternatives
to them.

Sphinx 3.1 is going to be uploaded to unstable in a couple of weeks. When that
happens, the severity of this bug will be bumped to serious.

In case you have questions, please Cc sphinx@packages.debian.org on reply.

[1]: https://www.sphinx-doc.org/en/3.x/changes.html
[2]: https://www.sphinx-doc.org/en/3.x/extdev/deprecated.html

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.

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#67824

From	Ben Hutchings <ben@decadent.org.uk>
Date	2020-08-23 16:40 +0200
Message-ID	<AGZk5-7xM-1@gated-at.bofh.it>
In reply to	#67371

[Multipart message — attachments visible in raw view] — view raw

Control: clone -1 -2
Control: tag -2 - ftbfs
Control: severity -2 important
Control: submitter -2 !
Control: close -1 5.7.17-1

On Wed, 2020-06-24 at 22:51 +0200, Lucas Nussbaum wrote:
> Source: linux
> Version: 5.6.14-2
> Severity: important
> Tags: ftbfs
> User: python-modules-team@lists.alioth.debian.org
> Usertags: sphinx3.1
> 
> Hi,
> 
> linux fails to build with Sphinx 3.1, currently available in
> experimental.
[...]

This is fixed for now by disabling the cdomain extension, but we will
need someone to update/rewrite it for Sphinx 3.

Ben.

-- 
Ben Hutchings
Beware of bugs in the above code;
I have only proved it correct, not tried it. - Donald Knuth

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#67825 — Processed: Re: Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))

From	"Debian Bug Tracking System" <owner@bugs.debian.org>
Date	2020-08-23 16:40 +0200
Subject	Processed: Re: Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Message-ID	<AGZk6-7xM-19@gated-at.bofh.it>
In reply to	#67371

Processing control commands:

> clone -1 -2
Bug #963636 [src:linux] linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Bug 963636 cloned as bug 968903
> tag -2 - ftbfs
Bug #968903 [src:linux] linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Removed tag(s) ftbfs.
> severity -2 important
Bug #968903 [src:linux] linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Severity set to 'important' from 'serious'
> submitter -2 !
Bug #968903 [src:linux] linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Changed Bug submitter to 'Ben Hutchings <ben@decadent.org.uk>' from 'Lucas Nussbaum <lucas@debian.org>'.
> close -1 5.7.17-1
Bug #963636 [src:linux] linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
The source 'linux' and version '5.7.17-1' do not appear to match any binary packages
Marked as fixed in versions linux/5.7.17-1.
Bug #963636 [src:linux] linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))
Marked Bug as done

-- 
963636: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=963636
968903: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=968903
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))

Contents

#67371 — Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))

#67824

#67825 — Processed: Re: Bug#963636: linux: FTBFS with Sphinx 3.1: Could not import extension cdomain (exception: cannot import name 'c_funcptr_sig_re' from 'sphinx.domains.c' (/usr/lib/python3/dist-packages/sphinx/domains/c.py))