Context menu icons in Gnome 3.16

Tue Jun 2 20:10:41 UTC 2015

Hi,
I'm messing with an old gtk+ program, that I think it's dead upstream
and I'm trying to see if I can resurrect it. Among other issues, it
should add some entries to nautilus' context menus (which it does) but
I can't get their icons to show. Then I noticed that I'm missing all
of my context menu icons, even though they are enabled in gsettings.
Is this a bug or a feature?