[Reportbug-maint] Bug#840614: GtkWarning: Theme directory base/ of theme oxygen has no size field

[Ph. Marek]

Package: reportbug
Version: 6.6.6
Severity: minor

Upon using reportbug I get a warning, independently of the package I'm 
reporting against:

    $ reportbug reportbug
    /usr/lib/python2.7/dist-packages/reportbug/ui/gtk2_ui.py:533: GtkWarning: Theme directory base/ of theme oxygen has no size field

      self.assistant.show()



-- Package-specific info:
** Environment settings:
EDITOR="vim"
DEBEMAIL="Philipp Marek <philipp.marek at linbit.com>"
INTERFACE="gtk2"

** /home/marek/.reportbugrc:
reportbug_version "4.12.6"
mode advanced
ui gtk2
realname "Ph. Marek"
email "philipp.marek at linbit.com"
no-cc
header "X-Debbugs-CC: philipp.marek at linbit.com"
smtphost reportbug.debian.org
mutt

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages reportbug depends on:
ii  apt               1.3.1
ii  python-reportbug  6.6.6
pn  python:any        <none>

reportbug recommends no packages.

Versions of packages reportbug suggests:
pn  claws-mail                               <none>
pn  debconf-utils                            <none>
ii  debsums                                  2.1.2
pn  dlocate                                  <none>
pn  emacs23-bin-common | emacs24-bin-common  <none>
ii  file                                     1:5.28-4
ii  gnupg                                    2.1.15-4
ii  postfix [mail-transport-agent]           3.1.0-5+b1
ii  python-gtk2                              2.24.0-5.1
pn  python-gtkspellcheck                     <none>
ii  python-urwid                             1.3.1-2+b1
ii  python-vte                               1:0.28.2-5+b1
ii  xdg-utils                                1.1.1-1

Versions of packages python-reportbug depends on:
ii  apt               1.3.1
ii  file              1:5.28-4
ii  python-debian     0.1.29
ii  python-debianbts  2.6.1
pn  python:any        <none>

python-reportbug suggests no packages.

-- no debconf information