Ok, now the only line shown is the missing dependency on adwaita-icon-theme.
As a test for a possible workaround, what is the output of
apt-get --simulate --no-install-recommends install libgtk-3-common=3.18.6-1ubuntu1 adwaita-icon-theme
Ok, now the only line shown is the missing dependency on adwaita-icon-theme.
As a test for a possible workaround, what is the output of
apt-get --simulate --no-install- recommends install libgtk- 3-common= 3.18.6- 1ubuntu1 adwaita-icon-theme