Comment 12 for bug 1815665

https://codesearch.debian.net/search?q=%5BSs%5D%5BEe%5D%5BTt%5D%5Cs*client_min_messages.*fatal
Not sure how I could search that way in a past release, but it gives some confirming hits.

For our current case I can confirm the following issues being due to this:
- skytools3 (xenial, not in archive later) #1
- pg-repack (bionic/cosmic) #2a
- postgres-plproxy (bionic/cosmic) #2b

The following two seems to be a different error thou:
- postgres-rum
This is more like the Tables were never created with errors like:
"operator does not exist: smallint[] % unknown at character 34"
- pg-partman [i386]

I'm adding bug tasks for those we identified and set them to triaged as we know how to fix them.
#3 - pg-partman [i386] - will stay unhandled until analyzed
#4 - postgres-rum - split this from the others and define is as #4