Re: ICU 54 and earlier are too dangerous

Jeff Davis <pgsql@j-davis.com> writes:
> In ICU 54 and earlier, if ucol_open() is unable to find a matching
> locale, it will fall back to the *environment*.

That's not great, but ...

> Unless someone has a better idea, I think we need to bump the minimum
> required ICU version to 55. That would solve the issue in v16 and
> later, but those using old versions of ICU and old versions of postgres
> would still be vulnerable to these kinds of typos.

... that seems like an overreaction.  We know from the buildfarm
that there's still a lot of old ICU out there.  Is it really improving
anybody's life to try to forbid them from using such a version?

            regards, tom lane