Lightdm-gtk-greeter seems to leak memory about 16-20MB/day.
On the Debian site https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734526 it reports that it was fixed around the 1.8.2 .
Steps to Reproduce:
1. Install and run lightdm-gtk-greeter
2. Run 'top' and record RSS for lightdm-gtk-greeter
3. Wait 1 day
4. Run 'top' and record RSS again
RSS will have increased around 16MB.
This will keep on increasing the longer the duration. I had lightdm-gtk-greeter eat almost 1GB RAM after 1.5 months of idle console.
RSS should not increase that much if any at all.
Apparently the newer versions of lightdm-gtk-greeter have this fixed, so a version bump would be sufficient to fix this problem. I unmasked and used lightdm-gtk-greeter-2.0.1-r1, though it uses more RAM on startup, does not seem to be leaking.
Closing this bug as obsolete because the afflicted version is no longer in portage and 2.0.1 does not appear to have this issue.