Bug#824603: meld gives python traceback on first use after installation.

[Jason Butler]

Package: meld
Version: 3.16.0-1
Severity: important

Dear Maintainer,

I 
 1. Ran apt-get update; apt-get install meld
 2. ran /usr/bin/meld
 3. See this traceback:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/meld/meldapp.py", line 72, in do_startup
    self.new_window()
  File "/usr/lib/python2.7/dist-packages/meld/meldapp.py", line 138, in new_window
    window = meldwindow.MeldWindow()
  File "/usr/lib/python2.7/dist-packages/meld/meldwindow.py", line 266, in __init__
    self.widget.set_help_overlay(shortcut_window)
AttributeError: 'ApplicationWindow' object has no attribute 'set_help_overlay'
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/meld/meldapp.py", line 78, in do_command_line
    tab = self.parse_args(command_line)
  File "/usr/lib/python2.7/dist-packages/meld/meldapp.py", line 336, in parse_args
    focus=i == 0)
  File "/usr/lib/python2.7/dist-packages/meld/meldapp.py", line 149, in open_files
    window = self.get_meld_window()
  File "/usr/lib/python2.7/dist-packages/meld/meldapp.py", line 144, in get_meld_window
    return self.get_active_window().meldwindow
AttributeError: 'NoneType' object has no attribute 'meldwindow'


-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: armhf

Kernel: Linux 4.3.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages meld depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.24.0-2
ii  gir1.2-gtksource-3.0                         3.20.2-1
ii  libcanberra-gtk3-module                      0.30-2.1
ii  libgtk-3-0                                   3.20.3-2
ii  libgtksourceview-3.0-1                       3.20.2-1
ii  patch                                        2.7.5-1
ii  python-gi                                    3.18.2-2+b1
ii  python-gi-cairo                              3.18.2-2+b1
pn  python:any                                   <none>

Versions of packages meld recommends:
ii  yelp  3.16.1-1

meld suggests no packages.

-- no debconf information