GNU bug report logs - #48290
27.2; Invalid time specification: encode-time((0 30 11 1 1 0 nil -1 nil))

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Евгений Михайлов
 <lewwadoo <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.2;
 Invalid time specification: encode-time((0 30 11 1 1 0 nil -1 nil))
Date: Sat, 8 May 2021 19:41:14 +0300

[Message part 1 (text/plain, inline)]

In GNU Emacs 27.2 (build 1, x86_64-w64-mingw32)
 of 2021-03-26 built on CIRROCUMULUS
Repository revision: deef5efafb70f4b171265b896505b92b6eef24e6
Repository branch: HEAD
Windowing system distributor 'Microsoft Corp.', version 10.0.19041
System Description: Microsoft Windows 10 Home (v10.0.2004.19041.928)

Recent messages:
Quit
Mark set
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my-mins-between
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user-error: Beginning of history; no preceding item
user-error: End of history; no default available
scroll-up-command: End of buffer
command-execute: Command attempted to use minibuffer while in minibuffer
Configured using:
 'configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY W32NOTIFY ACL GNUTLS LIBXML2
HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS MODULES THREADS JSON PDUMPER LCMS2 GMP

Important settings:
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Major mode: Emacs-Lisp

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Load-path shadows:
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Files/Emacs/x86_64/share/emacs/27.2/lisp/progmodes/flymake
c:/Users/pc/.emacs.d/elpa/eldoc-1.11.0/eldoc hides c:/Program
Files/Emacs/x86_64/share/emacs/27.2/lisp/emacs-lisp/eldoc

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Memory information:
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[Message part 2 (text/html, inline)]

Message #8 received at 48290 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Евгений Михайлов
 <lewwadoo <at> gmail.com>
Cc: 48290 <at> debbugs.gnu.org
Subject: Re: bug#48290: 27.2;
 Invalid time specification: encode-time((0 30 11 1 1 0 nil -1 nil))
Date: Sat, 08 May 2021 19:57:15 +0300

> From: Евгений Михайлов
>  <lewwadoo <at> gmail.com>
> Date: Sat, 8 May 2021 19:41:14 +0300
> 

Why do you think it's a bug.  Year 0 is 1970 years before the epoch.

Message #11 received at 48290 <at> debbugs.gnu.org (full text, mbox):

From: "Basil L. Contovounesios" <contovob <at> tcd.ie>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 48290 <at> debbugs.gnu.org,
 Евгений Михайлов
 <lewwadoo <at> gmail.com>
Subject: Re: bug#48290: 27.2; Invalid time specification: encode-time((0 30
 11 1 1 0 nil -1 nil))
Date: Sat, 08 May 2021 18:16:01 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Евгений Михайлов
>>  <lewwadoo <at> gmail.com>
>> Date: Sat, 8 May 2021 19:41:14 +0300
>
> Why do you think it's a bug.

I'm not Evgeny, but I think it's because the titular time spec includes
defaults set by decoded-time-set-defaults:

  (parse-time-string "11:30")
  ;; => (0 30 11 nil nil nil nil -1 nil)

  (decoded-time-set-defaults (parse-time-string "11:30"))
  ;; => (0 30 11 1 1 0 nil -1 nil)

Here's the context: https://emacs.stackexchange.com/q/64686/15748

> Year 0 is 1970 years before the epoch.

Ah, I missed the last part in the docstring of encode-time:

  Years before 1970 are not guaranteed to work.  On some systems,
  year values as low as 1901 do work.

So I don't know whether my suggested use of decoded-time-set-defaults is
wrong, or whether that function should set the year to 1970, as might be
assumed from its docstring.

Thanks,

-- 
Basil

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