Bug#819291: pitivi: 0.95-1+b1 segfaults against gtk+3.0 3.20

[Marc J. Driftmeyer]

Package: pitivi
Version: 0.95-1+b1
Severity: normal

Dear Maintainer,

mdriftmeyer at horus:~$ pitivi
Missing soft dependency:
- pycanberra not found on the system
    -> enables sound notifications when rendering is complete
Missing soft dependency:
- GnomeDesktop not found on the system
    -> file thumbnails provided by GNOME's thumbnailers
Missing soft dependency:
- Notify not found on the system
    -> enables visual notifications when rendering is complete
Traceback (most recent call last):
  File "/usr/lib/x86_64-linux-gnu/pitivi/python/pitivi/titleeditor.py", line 394, in tabSwitchedCb
    self._connect_signals()
  File "/usr/lib/x86_64-linux-gnu/pitivi/python/pitivi/titleeditor.py", line 326, in _connect_signals
    self.app.gui.viewer.target.connect(
AttributeError: 'NoneType' object has no attribute 'viewer'

(pitivi:14391): Gtk-WARNING **: Negative content width -608 (allocation -608, extents 0x0) while allocating gadget (node highlight, owner GtkScale)

(pitivi:14391): Gtk-WARNING **: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node border, owner pitivi+viewer+ViewerWidget)

(pitivi:14391): Gtk-WARNING **: Negative content height -1 (allocation 1, extents 1x1) while allocating gadget (node border, owner pitivi+viewer+ViewerWidget)

(pitivi:14391): Gtk-WARNING **: Allocating size to pitivi+viewer+TransformationBox 0x2fd8300 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate?
Segmentation fault
mdriftmeyer at horus:~$

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

Kernel: Linux 4.4.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages pitivi depends on:
ii  gir1.2-gdkpixbuf-2.0                                2.33.2-1
ii  gir1.2-ges-1.0                                      1.8.0-1
ii  gir1.2-glib-2.0                                     1.47.92-1
ii  gir1.2-gst-plugins-base-1.0                         1.8.0-1
ii  gir1.2-gstreamer-1.0                                1.8.0-1
ii  gir1.2-gtk-3.0                                      3.20.0-1
ii  gir1.2-pango-1.0                                    1.38.1-1
ii  gnome-icon-theme                                    3.12.0-1
ii  gstreamer1.0-alsa [gstreamer1.0-audiosink]          1.8.0-1
ii  gstreamer1.0-plugins-bad [gstreamer1.0-videosink]   1.8.0-1
ii  gstreamer1.0-plugins-base                           1.8.0-1
ii  gstreamer1.0-plugins-good [gstreamer1.0-videosink]  1.8.0-1
ii  gstreamer1.0-pulseaudio [gstreamer1.0-audiosink]    1.8.0-1
ii  gstreamer1.0-x [gstreamer1.0-videosink]             1.8.0-1
ii  libc6                                               2.22-4
ii  libcairo2                                           1.14.6-1
ii  python3                                             3.5.1-3
ii  python3-cairo                                       1.10.0+dfsg-5+b1
ii  python3-dbus                                        1.2.4-1
ii  python3-gi                                          3.18.2-2+b1
ii  python3-gi-cairo                                    3.18.2-2+b1
ii  python3-gst-1.0                                     1.8.0-1
ii  python3-matplotlib                                  1.5.1-1+b1
ii  python3-numpy                                       1:1.11.0~b3-1+b1
ii  python3-xdg                                         0.25-4
ii  python3.5                                           3.5.1-9

pitivi recommends no packages.

Versions of packages pitivi suggests:
ii  frei0r-plugins             1.4-3+b1
ii  gir1.2-gnomedesktop-3.0    3.19.93-1
ii  gir1.2-notify-0.7          0.7.6-2
ii  gstreamer1.0-libav         1.8.0-1
ii  gstreamer1.0-plugins-ugly  1.8.0-1

-- no debconf information