Our project is presenting a dbus service exposing some objects which have a property of type "v" (variant). On the Python side, those contain a tuple of a string and two integers. So the "container" has dbus_signature="v" and the content is put together like this:

dbus.Struct([
                filename,
                line_start,
                line_end
            ], signature=dbus.Signature("(suu)"))

When I attempt to look at this property in d-feet, I get the following exception:

Traceback (most recent call last):

+ Trace 232097

One of my colleagues figured out that the string formatting in line 87 is missing a comma (single-element tuple syntax is botched). If I change line 87 to read:

    s += " = %s" % (self.value, )

then things work as expected and d-feet is able to properly show the variant data in the UI.

This was observed on d-feet 0.3.3 on an Ubuntu 13.04 system, I also checked and the code is still like this in git://git.gnome.org/d-feet, so I assume the problem is still present. On the git repository, however, the troublesome tuple has moved to line 90.