On Sun, May 20, 2018 at 1:13 PM, Peter Geoghegan <pg@bowt.ie> wrote:
There have been cases where we chose to not back-patch an unambiguous bug fix even though it was clear that incorrect user-visible behavior remained.
The risk here is significantly reduced since the existing user-visible behavior is an error which presumably no one is relying upon. Between that and being able to conform to the standard syntax for a long-standing feature I would say the benefit outweighs the cost and risk.