It seems like any "make check" would fail .. but did you also try cirrusci from your own github account? ./src/tools/ci/README
I definitely ran "make check" but I did not realize there is also cirrusci. I will look at that. I'm having trouble interpreting the cfbot page to which you linked but I'll try to run cirrusci myself before worrying too much about that.
Running "make check" the first time I was surprised to see no failures - so I added tests for \df+, which passed when I did "make check".
BTW, I think "ELSE NULL" could be omitted.
Looks like; I'll update. Might as well reduce the visual size of the code.
