Thanks for the detailed report. pyexiv2 is not actively maintained any longer, it has been deprecated in favour of https://wiki.gnome.org/Projects/gexiv2.
As you point out, it looks like the issue could be in exiv2 itself. You might want to file a bug with all those details at http://dev.exiv2.org/projects/exiv2/issues.
Thanks for the detailed report. pyexiv2 is not actively maintained any longer, it has been deprecated in favour of https:/ /wiki.gnome. org/Projects/ gexiv2.
As you point out, it looks like the issue could be in exiv2 itself. You might want to file a bug with all those details at http:// dev.exiv2. org/projects/ exiv2/issues.