Re: [xml] Python 3.5 issue - SystemError: <built-in function xmlReadFile> returned a result with an error set

[Daniel Veillard <veillard redhat com>]

  Hum,

yes seeing the same with 3.5.3:

thinkpad2:~/XML/python/tests -> python3 tstLastError.py
TypeError: 'NoneType' object is not callable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "tstLastError.py", line 80, in <module>
    test.test1()
  File "tstLastError.py", line 62, in test1
    line=0)
  File "tstLastError.py", line 30, in failUnlessXmlError
    f(*args)
  File "/home/veillard/XML/python/libxml2.py", line 1374, in readFile
    ret = libxml2mod.xmlReadFile(filename, encoding, options)
SystemError: <built-in function xmlReadFile> returned a result with an error set
thinkpad2:~/XML/python/tests -> 

 This feels like we tried to call a None method but somehow in the
C python bindings, it's generated and does

    if (!PyArg_ParseTuple(args, (char *)"zzi:xmlReadFile", &filename, &encoding, &options))
        return(NULL);

    c_retval = xmlReadFile(filename, encoding, options);
    py_retval = libxml_xmlDocPtrWrap((xmlDocPtr) c_retval);
    return(py_retval);

 unclear what is going wrong there, c_retval ought to be NULL, and
libxml_xmlDocPtrWrap should just Py_INCREF(Py_None); and return Py_None

we are specifically testing how an error is processed trying to parse a
non existent file, and it seems that the way python3 evaluation proceeds
differs in 3.5 maybe it checks for C bindings returning Py_None but that
should show in many placews I think...

  puzzled,

Daniel

On Wed, Aug 30, 2017 at 02:00:48PM +0200, Petr Sumbera wrote:
> Hi,
>
> anyone seen following error when running Python regression tests? This is
> just with Python 3.5. Pythons 2.7 and 3.4 are ok (I haven't tested Python
> 3.6).
>
> Any idea?
>
> Thanks,
>
> Petr
>
>
> ## running Python regression tests
> TypeError: 'NoneType' object is not callable
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
>   File 
> "/builds/psumbera/userland-libxml2-2.9.5/components/libxml2/libxml2-2.9.5/python/tests/tstLastError.py",
> line 80, in <module>
>     test.test1()
>   File 
> "/builds/psumbera/userland-libxml2-2.9.5/components/libxml2/libxml2-2.9.5/python/tests/tstLastError.py",
> line 62, in test1
>     line=0)
>   File 
> "/builds/psumbera/userland-libxml2-2.9.5/components/libxml2/libxml2-2.9.5/python/tests/tstLastError.py",
> line 30, in failUnlessXmlError
>     f(*args)
>   File "/builds/psumbera/userland-libxml2-2.9.5/components/libxml2/libxml2-2.9.5/python/libxml2.py",
> line 1374, in readFile
>     ret = libxml2mod.xmlReadFile(filename, encoding, options)
> SystemError: <built-in function xmlReadFile> returned a result with an error
> set
> -- tstLastError.py
> _______________________________________________
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> https://mail.gnome.org/mailman/listinfo/xml

-- 
Daniel Veillard      | Red Hat Developers Tools http://developer.redhat.com/
veillard redhat com  | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | virtualization library  http://libvirt.org/