[Bug time/34480] mktime fails to determine DST for America/Vancouver from tzdata 2026b

aurelien at aurel32 dot net via Glibc-bugs <[email protected]> Tue, 04 Aug 2026 08:03:25 +0000

Newsgroups	gmane.comp.lib.glibc.bugs
Message-ID	<[email protected]/bugzilla/>

https://sourceware.org/bugzilla/show_bug.cgi?id=3D34480

Aurelien Jarno <aurelien at aurel32 dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |---

--- Comment #2 from Aurelien Jarno <aurelien at aurel32 dot net> ---
(In reply to Andreas Schwab from comment #1)
> Not a bug, see
> https://lists.iana.org/hyperkitty/list/[email protected]/thread/
> WVINVKKZEKUHQV7OYHW7JMALAZGAMWNL/

I agree the submitted bug in the Debian BTS has a buggy code attached. But =
this
is not the reproducer I attached to this bug. Here it involves only mktime,
which behaves differently from on day to another, for a date that does not
correspond to a transition in the timezone.

mktime should either fix tm_isdst or not fix it (POSIX 2024 says it shall n=
ot),
but this decision should not depend on the time passed.

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