bug#48085: [PATCH 3/3] mktime: improve tm_isdst heuristic

[Paul Eggert]

On 2025-01-05 07:07, Pádraig Brady wrote:
> I notice coreutils CI is now failing in a gnulib test with:
>
> test-parse-datetime.c:419: assertion 'result.tv_sec == 515107490 - 60 * 
> 60 + (has_leap_seconds ? 13 : 0)' failed
>
> Adding some extra debug I see that
> result.tv_sec is 1 hour too late (i.e. 515107490).
>
> This test is related to https://bugs.gnu.org/48085

Yes, it looks like that test is too picky, since Bug#48085 is about 
parse_datetime failing rather than about a particular value. Although I 
could not reproduce the test failure on either Fedora 41 or Ubuntu 24.10 
I installed the attached patch, which I hope fixes things for the 
coreutils CI (for which I don't know the build+run environment).

0001-parse-datetime-tests-port-to-Gnulib-mktime.patch
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