Comment 7 for bug 1791991

One more thing about the bubblewrap.
Now that gnome-desktop3 (libgnome-desktop-3-17_3.30.1-1ubuntu1) is build against bubblewrap and depends on it, thumbnailer is working correctly on my system.

The new gnome-desktop3 has been changed:
"debian/patches/disable-bubblewrap.patch, debian/control*: Drop changes to disable bubblewrap, now that it is approved to go into main."

I did test this with the official nautilus-3.26.4-0ubuntu4 and tracker_2.1.4-1 (in proposed).