bug#38642: closed ('C-x RET c' gets stuck in universal-argument loop)

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Your message dated Fri, 20 Dec 2019 17:52:17 -0500
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and subject line Re: bug#38642: 'C-x RET c' gets stuck in universal-argument 
loop
has caused the debbugs.gnu.org bug report #38642,
regarding 'C-x RET c' gets stuck in universal-argument loop
to be marked as done.

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38642: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=38642
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> --- Begin Message ---
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> Subject: 
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> 'C-x RET c' gets stuck in universal-argument loop
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> Date: 
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> Mon, 16 Dec 2019 23:56:08 +0200
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> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu)
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>
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> emacs -Q
> C-x RET c       ;; universal-coding-system-argument
> RET             ;; accept default e.g. utf-8-unix
> C-u C-b         ;; moves backwards 4 chars
> C-b C-b C-b ...
>
> Every C-b still moves backwards 4 chars because it gets stuck with an old
> 'prefix-arg' in the 'while' loop in 'universal-coding-system-argument'.
>
> It gets out of this loop only on an error such as when point reaches
> the beginning of the buffer that signals an error.
>
> PS: this is the simplest reproducible case, but I found this bug
> by trying to use 'C-x RET c C-u C-u M-x rgrep' that with two C-u prefixes
> allows editing the grep command.
>
>
>
> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Re: bug#38642: 'C-x RET c' gets stuck in universal-argument loop
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>
>
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> Date: 
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> Fri, 20 Dec 2019 17:52:17 -0500
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> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)
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>
> > Stefan, any ideas for how to fix this unintended consequence?
>
> I installed a patch which seems to fix it.  We should rewrite this
> function completely, but I tried to minimize the changes for now.
>
>
>         Stefan
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>
>
> --- End Message ---