Created attachment 307098 [details]
backtrace

Created attachment 307100 [details]
reproducer

The problem is in the packaging, there's just no proper error return path in rpm
for this situation:

    rpmError(xx, _("magic_file(ms, \"%s\") failed: mode %06o %s\n"),
                        s, mode, magic_error(ms));
    assert(ftype != NULL);  /* XXX figger a proper return path. */

What happens here is that in %install, you mv files into the packages docdir,
but %doc processing blows away the docdir before copying anything into it. Right
before the abort you'll see something like this in the buildlog:

+ export DOCDIR
+ rm -rf
/var/tmp/PythonCard-0.8.2-1.fc9-root-pmatilai/usr/share/doc/PythonCard-0.8.2
+ /bin/mkdir -p
/var/tmp/PythonCard-0.8.2-1.fc9-root-pmatilai/usr/share/doc/PythonCard-0.8.2
+ cp -pr LICENSE.txt PKG-INFO README_StyleEditor.txt README.txt
/var/tmp/PythonCard-0.8.2-1.fc9-root-pmatilai/usr/share/doc/PythonCard-0.8.2

So anything you manually put into %{_docdir}/%{name}-%{release} in %install just
got removed so the file classification code tries to access non-existent files,
that's why it blows up.

Moral of the story: don't mix %doc and manual copying/moving into the docdir.
Either install all the docs with %doc in %files or put all the docs there
manually. And yes, rpm should handle this more cleanly than abort().

Question: What is the Finnish translation for the comment

    XXX figger a proper return path

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