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bug#22622: 24.5; ask-user-about-supersession-threat causes emacs -batch
From: |
Eli Zaretskii |
Subject: |
bug#22622: 24.5; ask-user-about-supersession-threat causes emacs -batch to hang |
Date: |
Sat, 13 Feb 2016 15:42:55 +0200 |
> From: Richard Sharman <richard.sharman@mitel.com>
> Date: Wed, 10 Feb 2016 18:27:30 +0000
> Cc: Richard Sharman <richard.sharman@mitel.com>
>
> I'm not sure if this is a bug or not.
>
> When running emacs -batch, if a function modifies a buffer and calls
> save-buffer and there is another emacs -batch also updating the same
> file, one of them can call ask-user-about-supersession-threat [in
> userlock.el].
>
> This causes the emacs process to hang because read-char-choice never
> returns. See traceback below.
>
> This happened when running make -j 6 and I changed the scenario to not
> happen, but I wondered if ask-user-about-supersession-threat should be
> act upon variable noninteractive.
>
> Perhaps one is supposed to supply a replacement for
> ask-user-about-supersession-threat if running emacs in batch mode?
Does anyone see a problem with automatically answering NO to that
question in batch mode?