Bug#838418: libreoffice-gtk3: Font corruption - both content and dialogs

[Simon John <debian@the-jedi.co.uk>]

Package: libreoffice-gtk3
Version: 1:5.2.1-3
Severity: grave
Justification: renders package unusable

Dear Maintainer,

   * What led up to the situation?

Upgrade of libreoffice. It was definitely working fine on August 16th,
then I haven't done any upgrades until this last week, so I suspect the
move from 5.2.0 to 5.2.1

   * What exactly did you do (or not do) that was effective (or
	ineffective)?

Loaded a spreadsheet, then changed a filter or preference that caused
the display to refresh.

   * What was the outcome of this action?

Cell content was illegible - sometimes just garbarge, sometimes the
characters were replaced with other (random?) characters, sometimes some
characters were emboldened.

Also dialog boxes were corrupted - such as the save/discard/cancel
buttons, and even the text in the input line.

I tried various things - deleting the user profile, running as root,
rolling back to 5.2.1-1, reinstalling fonts, nothing worked other than
uninstalling libreoffice-gtk3.

Its not a driver issue as I get the same problem on Nvidia (nouveau)
desktop and Intel laptop.



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

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

Versions of packages libreoffice-gtk3 depends on:
ii  dpkg                      1.18.10
ii  libatk1.0-0               2.22.0-1
ii  libc6                     2.24-3
ii  libcairo-gobject2         1.14.6-1+b1
ii  libcairo2                 1.14.6-1+b1
ii  libdbus-1-3               1.10.10-1
ii  libdbus-glib-1-2          0.108-1
ii  libgcc1                   1:6.2.0-4
ii  libgdk-pixbuf2.0-0        2.36.0-1
ii  libgl1-mesa-glx [libgl1]  12.0.3-1
ii  libglew2.0                2.0.0-3
ii  libglib2.0-0              2.49.7-1
ii  libglu1-mesa [libglu1]    9.0.0-2.1
ii  libgtk-3-0                3.21.6-1
ii  libice6                   2:1.0.9-1+b1
ii  libpango-1.0-0            1.40.2-1
ii  libpangocairo-1.0-0       1.40.2-1
ii  libreoffice-core          1:5.2.1-3
ii  libsm6                    2:1.2.2-1+b1
ii  libstdc++6                6.2.0-4
ii  libx11-6                  2:1.6.3-1
ii  libxext6                  2:1.3.3-1
ii  uno-libs3                 5.2.1-3
ii  ure                       5.2.1-3

Versions of packages libreoffice-gtk3 recommends:
ii  libreoffice-style-tango  1:5.2.1-3

Versions of packages libreoffice-gtk3 suggests:
ii  libreofficekit-data  1:5.2.1-3

-- no debconf information