Thomas Kellerer wrote: > I was trying to learn how the new non-deterministic collations in v12 > work, but the following makes the backend crash: > > CREATE COLLATION de_ci (provider = icu, locale = 'de-x-icu', > deterministic = false); > > Which leads to: > > 2019-10-04 11:54:23 CEST LOG: server process (PID 7540) was > terminated by exception 0xC0000005 > > I might have misunderstood how to use deterministic to create a case- > insensitive collation, but I don't think the backend should crash if > I do something wrong ;) Yes, there is a bug somewhere. FWIW, it works on my Linux system. To get a case insensitive collation you'd have to use something like LOCALE = 'de-DE-u-ks-level2' Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com