I wrote:
> Ugh. I think we'd better fix that before 15.0, else somebody may
> think this is the new intended behavior and raise compatibility
> concerns when we fix it. I will see if I can squeeze it in before
> this afternoon's 15rc2 wrap.
Pushed after making some corrections.
Given the time pressure, I did not worry about installing regression
test coverage for this stuff, but I wonder if we shouldn't add some.
regards, tom lane