I have an extension that uses background workers. I pass a database oid as an argument in order to launch the worker using function BackgroundWorkerInitializeConnectionByOid. In one of my regression tests that was written, I intentionally launch the worker with an invalid oid. In earlier PG versions the worker would successfully launch but then terminate asynchronously, with a message in the server log. Now, it does not even successfully launch but immediately errors (hence failing my regression tests).
I have recently installed all later point releases of all versions 9.5-11, so I assume this is due to some code change. The behavior seems reasonable but I don't find any obvious release notes indicating a patch that would have changed this behavior. Any thoughts?
