Re: Text copied from *grep* buffer has NUL (0x00) characters

[Eli Zaretskii <eliz@gnu.org>]

> From: "R. Diez" <rdiezmail-emacs@yahoo.de>
> Date: Sun, 9 May 2021 11:19:38 +0200
> 
> I would say that Emacs has 2 issues here:
> 
> 
> 1) If a text file encoding is utf-8-with-signature-dos, I do not think that it is a good idea for Emacs to allow binary zeros without any warning.

There's nothing wrong with null bytes in a UTF-8 encoded file, not in
general.  We could have an optional warning about null bytes (when?
when you save the buffer?).  But I see no reason to do that by
default, especially since such a feature would require a costly search
of the entire buffer.

> 2) Copying text from a *grep* buffer that looks like ":" should not suddenly deliver a NUL character instead. That's just unexpected and prone to 
> problems down the line.

This is easy to fix: customize the Grep command to not include
"--null".  That switch is mainly for systems that allow newlines in
file names, which MS-Windows doesn't allow, so if this switch causes
trouble in your usage, simply remove it.