Re: libxml2 or expat regression in Rawhide?

[Miro Hrončok <mhroncok@xxxxxxxxxx>]

On 22. 02. 22 12:26, Tomas Korbar wrote:
> Hi Miro,
> Very interesting. This is the latest upstream version of expat and
> nothing was suggesting that there could be such issues.
> I will start to look for the cause of this immediately.

Thanks.

I see that there is a build of expect for Fedora 35. I've tagged the build to a 
side tag (f35-build-side-51003) and will try to rebuild Pythons there. That 
should give us some information whether the failures are caused by expact or 
libxml2.

> Thanks for bringing this to my attention.
>
> On Tue, Feb 22, 2022 at 12:25 PM Miro Hrončok <mhroncok@xxxxxxxxxx> wrote:
> > On 22. 02. 22 12:20, Miro Hrončok wrote:
> > > Hello Dave and Tomas,
> > >
> > > I see in Koschei that since libxml2 has been upgraded from 2.9.12-7.fc36 to
> > > 2.9.13-1.fc37 [1] and expat has been upgraded from 2.4.4-1.fc36 to 2.4.6-1.fc37
> > > [2], Python fails to build (as well as many other packages).
> > >
> > > The Python test failures are:
> > >
> > > ======================================================================
> > > ERROR: testEncodings (test.test_minidom.MinidomTest)
> > > ----------------------------------------------------------------------
> > > Traceback (most recent call last):
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/test/test_minidom.py", line
> > > 1150, in testEncodings
> > >       self.assertRaises(UnicodeDecodeError, parseString,
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/unittest/case.py", line 816,
> > > in assertRaises
> > >       return context.handle('assertRaises', args, kwargs)
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/unittest/case.py", line 202,
> > > in handle
> > >       callable_obj(*args, **kwargs)
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/dom/minidom.py", line
> > > 1969, in parseString
> > >       return expatbuilder.parseString(string)
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/dom/expatbuilder.py", line
> > > 925, in parseString
> > >       return builder.parseString(string)
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/dom/expatbuilder.py", line
> > > 223, in parseString
> > >       parser.Parse(string, True)
> > > xml.parsers.expat.ExpatError: not well-formed (invalid token): line 1, column 5
> > >
> > > ======================================================================
> > > ERROR: testExceptionOnSpacesInXMLNSValue (test.test_minidom.MinidomTest)
> > > ----------------------------------------------------------------------
> > > Traceback (most recent call last):
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/test/test_minidom.py", line
> > > 1597, in testExceptionOnSpacesInXMLNSValue
> > >       parseString('<element xmlns:abc="http:abc.com/de f g/hi/j k"><abc:foo
> > > /></element>')
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/dom/minidom.py", line
> > > 1969, in parseString
> > >       return expatbuilder.parseString(string)
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/dom/expatbuilder.py", line
> > > 925, in parseString
> > >       return builder.parseString(string)
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/dom/expatbuilder.py", line
> > > 223, in parseString
> > >       parser.Parse(string, True)
> > > xml.parsers.expat.ExpatError: syntax error: line 1, column 0
> > > ----------------------------------------------------------------------
> > >
> > > ======================================================================
> > > ERROR: test_issue3151 (test.test_xml_etree.BugsTest)
> > > ----------------------------------------------------------------------
> > > Traceback (most recent call last):
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/test/test_xml_etree.py", line
> > > 1972, in test_issue3151
> > >       e = ET.XML('<prefix:localname xmlns:prefix="${stuff}"/>')
> > >     File "/builddir/build/BUILD/Python-3.8.12/Lib/xml/etree/ElementTree.py",
> > > line 1320, in XML
> > >       parser.feed(text)
> > > xml.etree.ElementTree.ParseError: syntax error: line 1, column 0
> > > ----------------------------------------------------------------------
> > >
> > > Is it possible that libxml2 or expat (or both) have a regression that causes a
> > > previously valid XML document to fail to parse?
> > >
> > > [1]
> > > https://koschei.fedoraproject.org/affected-by/libxml2-devel?epoch1=0&version1=2.9.12&release1=7.fc36&epoch2=0&version2=2.9.13&release2=1.fc37&collection=f37
> > >
> > > [2]
> > > https://koschei.fedoraproject.org/affected-by/expat-devel?epoch1=0&version1=2.4.4&release1=1.fc36&epoch2=0&version2=2.4.6&release2=1.fc37&collection=f37
> >
> > This also happens on Fedora 36:
> >
> > https://koschei.fedoraproject.org/affected-by/libxml2?epoch1=0&version1=2.9.12&release1=7.fc36&epoch2=0&version2=2.9.13&release2=1.fc36&collection=f36
> > https://koschei.fedoraproject.org/affected-by/expat-devel?epoch1=0&version1=2.4.4&release1=1.fc36&epoch2=0&version2=2.4.6&release2=1.fc36&collection=f36
> >
> > --
> > Miro Hrončok
> > --
> > Phone: +420777974800
> > IRC: mhroncok

--
Miro Hrončok
--
Phone: +420777974800
IRC: mhroncok
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