Problematic use of std:regex on Windows (MSYS2 UCRT64) about exiv2

[neheb]

new issue probably. would be great to find which regex causes problems.

[kamiccolo]

mhm. Do seem like a bigger issue at hand.

I wonder, if we could try and reduce the grammar in use a bit (do look like a sane thing to try) do to the following:

"By default, if no grammar is specified, ECMAScript is assumed. Only one grammar may be specified." [1]

I wonder if that could/would/should change anything.

[1] https://learn.microsoft.com/en-us/cpp/standard-library/regular-expressions-cpp?view=msvc-170

Also, yet, another interesting thread on GCC side of things: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98723

[lb90]

We may fix the issue in GCC/libstdc++ then. Taking in account the return value / errno in calls to strxfrm() should be enough.

[Wormnest]

and now it gets stuck on a different image with IPTC DateCreated/TimeCreated tags; looks like they also use regex.

Should this be reopened, or is a new issue better, or wait for a fix in libstdc++?