On Fri, May 30, 2025 at 7:42 AM PG Bug reporting form <noreply@postgresql.org> wrote: > The following bug has been logged on the website: > > Bug reference: 18940 > Logged by: Joe Ayers > Email address: joseph.ayers@crunchydata.com > PostgreSQL version: 18beta1 > Operating system: Windows Server 2022 > Description: > > Hey there! > In working on some test builds, PostgreSQL 18beta1 is failing the > 'collate.windows.win1252' regression test due to missing locales. When > building with MYS2/mingw (Tested Windows Server 2022 and Windows Server > 2019), default locale that's pulled in is typically 'american_usa' as > opposed to 'en_US', which causes the test to fail citing: > +ERROR: could not create locale "en-US": No such file or directory > +DETAIL: The operating system could not find any locale data for the > locale name "en-US". > The above error is repeated several times. Hoping to learn how to adjust the > config to get this to pass, as the error did not occur for PG17 and below. > Any info is appreciated. > I can attach the full regression.diffs file for additional information if it > would be of help.
I wonder what is different. Are you using ucrt? We started removing bits and pieces related to the old msvcrt C runtime, but my understanding is that msys2 compile should target ucrt by default.
