Comment 10 for bug 1780501

I agree that having downstream API differences is bad and that it shouldn't be fixed for cosmic. However, projects / packages other than ubuntu-release-upgrader have had to do extra work because of the SRU of this in Ubuntu 18.04. See https://bugs.launchpad.net/cubic/+bug/1779015 and the changes identified in guake.

We don't know how many other packages / projects have code which expects feed_child() to behave a specific way and changing that underneath them is wrong. There was some discussion in the foundations team meeting regarding the issue.

https://irclogs.ubuntu.com/2018/07/12/%23ubuntu-meeting.html#t15:30

Please revert this change in Ubuntu 18.04.