bug#46388: closed (27.1; emacs -batch does not output messages immediately when invoked outside of the command prompt)

[GNU bug Tracking System]

Your message dated Thu, 11 Mar 2021 10:43:40 -0800
with message-id <34cf6aaa-ee85-fbdc-3e39-5f4f44eb1ac9@cs.ucla.edu>
and subject line Re: bug#46388: 27.1; emacs -batch does not output messages 
immediately when invoked outside of the command prompt
has caused the debbugs.gnu.org bug report #46388,
regarding 27.1; emacs -batch does not output messages immediately when invoked 
outside of the command prompt
to be marked as done.

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46388: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=46388
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> --- Begin Message ---
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> Subject: 
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> 27.1; emacs -batch does not output messages immediately when invoked outside of the command prompt
>
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> Date: 
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> Mon, 8 Feb 2021 21:20:47 +0000
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>     There appears to be an issue with the /message/ function when
>     emacs is invoked in -batch mode on windows-nt from outside the
>     windows console (i.e. not directly from the command
>     prompt). Messages are not displayed to the user until emacs exits.
>
>     Consider the following command from example, which suppose to
>     print the message "hi" first to the user and then exit after 5 seconds:
>
>     : emacs -Q --batch --eval="(progn (message \"hi\") (sit-for 5))"
>
>     When this command is invoked from within an emacs eshell on
>     windows, the message is only displayed to the user after about 5 seconds,
>     i.e when emacs is about to exit.
>
>     Here is a small summary running the above under Linux and windows
>     native:
>
>     | system              | invoked from   | terminal output
>                  |
>     
> |---------------------+----------------+--------------------------------------------|
>     | x86_64-pc-linux-gnu | terminal       | prints "hi", then after 5
> seconds it exits |
>     | x86_64-pc-linux-gnu | emacs eshell   | prints "hi", then after 5
> seconds it exits |
>     | x86_64-w64-mingw32  | command prompt | prints "hi", then after 5
> seconds it exits |
>     | x86_64-w64-mingw32  | emacs eshell   | after 5 seconds prints
> "hi", then exits    |
>
>     The issue on windows is not exclusive to invoking emacs -batch
>     from within emacs (e.g. from eshell), it applies to any invocation
> that happens
>     outside the command prompt, e.g. from inside the MSYS2 mintty
>     terminal.
>
>     It appears as if the issue is caused by a different stderr
>     buffering mode used when a program is invoked outside of
>     the command prompt. Analysis to follow.
>
> In GNU Emacs 27.1 (build 1, x86_64-w64-mingw32)
>  of 2020-11-19 built on fv-az68-340
> Repository revision: ec297125a76481c55390d0b329e541907879d6f3
> Repository branch: master
> Windowing system distributor 'Microsoft Corp.', version 10
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#46388: 27.1; emacs -batch does not output messages immediately when invoked outside of the command prompt
>
>
>
>
> Date: 
>
> Thu, 11 Mar 2021 10:43:40 -0800
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>
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1
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>
>
>
> On 3/11/21 6:27 AM, Eli Zaretskii wrote:
> > This is fine, please install.
>
> OK, done, and closing the bug report.
>
>
> --- End Message ---