[Bug time/19738] __tzfile_default 32-bit time_t overflow

[eggert at gnu dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=19738

--- Comment #14 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Carlos O'Donell from comment #13)
> So in summary:
> * Only impacts 32-bit targets
> * For users which have custom TZ values that don't map to exiting rules
> files.
> * Requires the use of a new posixrules compiled with a zic that includes
> fixes present in tzcode 2014c (2014-05-13) and later.

While that's all correct, it's a bit scarier than reality. Perhaps you could
append to the 2nd bullet the phrase "and that specify daylight saving time
without giving daylight saving rules". E.g., as sbr mentions, the bug occurs
with TZ='PST+8PDT' but does not occur with TZ='PST+8PDT,M3.2.0,M11.1.1'.

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