Bug#1001774: tm_isdst=1 with mktime produces unexpected output
On 2021-12-20 09:06, Daniel McDonald wrote:
> Dear Aurelian,
>
> I can confirm that changing the timezone within Ubuntu 20.04 through Github Actions resolves the bug. The default set timezone is “Etc/UTC” as reported by “timedatectl”. Setting to “America/Los_Angeles” with “timedatectl” allows for a passing workflow. A link to the pass, with contextual information, can be found here (note, this is under a fork of CPython where this behavior was being investigated):
>
> https://github.com/wasade/cpython/runs/4584894670?check_suite_focus=true#step:17:76
>
> While this is reassuring, it seems the behavior is qualitatively different across operating systems (or glibc versions). I’m unsure if that is expected. As an example, we pass on Ubuntu 18.04 without changing the timezone:
>
> https://github.com/wasade/cpython/runs/4585124128?check_suite_focus=true#step:14:43
Ubuntu 18.04 seems to run glibc 2.27. Versions of glibc older than 2.29
are affected by bug #23789 [1], and do not report any error if the date
is not representable. This is arguably a bug in Ubuntu 18.04, but this
behaviour is expected.
Regards,
Aurelien
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=23789
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien@aurel32.net http://www.aurel32.net
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