gnome-system-log crashes on applying new filter

[eezacque]

Adding a new filter (any filter crashes).
When clicking 'Apply' gnome-system-log crashes, filter was not saved.

Error message:
(gnome-system-log:7701): GLib-GObject-WARNING **: g_object_get_valist: object class 'GtkTextTag' has no property named 'foreground-gdk'
Segmentation fault (core dumped)

Running gnome-system-log 3.9.90-4
on Ubuntu 16.04.1 LTS

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gnome-system-log - 3.9.90-7

---------------
gnome-system-log (3.9.90-7) unstable; urgency=medium

  * debian/patches/git_gdkrgba_use.patch:
    - logview-prefs: complete migration to GdkRGBA, should fix the
      segfault when using filtering with colors (lp: #1648189)

 -- Sebastien Bacher <email address hidden> Wed, 28 Nov 2018 16:08:09 +0100

[Bib (bybeu)]

On 16.04.6 gnome-system-log 3.9.90-4
[2483765.803756] gnome-system-lo[24806]: segfault at 7f770dc949a5 ip 00007f770dc95286 sp 00007fff61342f30 error 7 in libglib-2.0.so.0.4800.2[7f770dc2e000+10f000]
[2483865.289100] gnome-system-lo[27476]: segfault at 7f99a5fa49a5 ip 00007f99a5fa5286 sp 00007ffd1ff3b510 error 7 in libglib-2.0.so.0.4800.2[7f99a5f3e000+10f000]
[2483941.173054] gnome-system-lo[28006]: segfault at 7fcba242c9a5 ip 00007fcba242d286 sp 00007fff42478e30 error 7 in libglib-2.0.so.0.4800.2[7fcba23c6000+10f000]

Please how do I update (my ubuntu has regular updates enabled yet)
Thanks