Bug#819732: gnome-terminal: [Wayland] window enlarges on startup, focus, unfocus, Enter keypress, resize

[Simon McVittie]

Package: gnome-terminal
Version: 3.20.0-2
Severity: important

Steps to reproduce:
0. Configure gnome-terminal to start at 80x24, the default
1. Log in to GNOME (Wayland) session; I'm using gnome-session 3.20
   where this is just called "GNOME"
2. Open gnome-terminal
3. Press Enter
4. Move input focus to some other window, e.g. xterm
5. Move input focus back
6. Change window size with Ctrl-plus, Ctrl-minus

Expected result:
2-5. Terminal is 80x24
6. Terminal resizes normally

Actual result:
2. Terminal starts at what looks like 80x24, then size jumps to somewhat
   larger (maybe 100x30)
3. Terminal becomes around 10% larger in each dimension
4. Terminal becomes around 10% larger in each dimension
5. Terminal becomes around 10% larger in each dimension
6. After each resize, terminal becomes larger than the resized dimensions

This might be a regression caused by patching the resize behaviour
back in (#819712). If so, I'm glad I uploaded that version to experimental...

-- System Information:
Debian Release: stretch/sid
  APT prefers buildd-unstable
  APT policy: (500, 'buildd-unstable'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'buildd-experimental'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.5.0-trunk-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnome-terminal depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.24.0-2
ii  gconf-service                                3.2.6-3
ii  gnome-terminal-data                          3.20.0-2
ii  gsettings-desktop-schemas                    3.20.0-1
ii  libatk1.0-0                                  2.18.0-1
ii  libc6                                        2.22-5
ii  libcairo-gobject2                            1.14.6-1
ii  libcairo2                                    1.14.6-1
ii  libdconf1                                    0.24.0-2
ii  libgconf-2-4                                 3.2.6-3
ii  libgdk-pixbuf2.0-0                           2.32.3-1.2
ii  libglib2.0-0                                 2.48.0-1
ii  libgtk-3-0                                   3.20.1-2
ii  libnautilus-extension1a                      3.19.93-1
ii  libpango-1.0-0                               1.38.1-1
ii  libpangocairo-1.0-0                          1.38.1-1
ii  libuuid1                                     2.27.1-6
ii  libvte-2.91-0                                0.44.0-2
ii  libx11-6                                     2:1.6.3-1

Versions of packages gnome-terminal recommends:
ii  dbus-x11  1.11.2-1
ii  gvfs      1.27.92-1
ii  yelp      3.16.1-1

gnome-terminal suggests no packages.

-- no debconf information