Subject: Re: bug#22096: 25.0.50; reading from fifo breaks display

From: Mark Oteiza <[email-masked]>
Date: Sat, 5 Dec 2015 15:58:55 -0500

On 05/12/15 at 09:38pm, Eli Zaretskii wrote:
> > From: Mark Oteiza <[email-masked]>
> > Date: Sat, 05 Dec 2015 13:29:14 -0500
> > 
> > Simpler recipe:
> > 
> > 1. mkfifo foo
> > 2. echo "bar" > foo
> > 
> > In emacs -Q:
> > 
> > 3. Evaluate (insert-file-contents-literally "foo" t)
> > 
> > The buffer display is now broken.
> 
> Thanks.  My Emacs is configured with --enable-checking, so it aborted
> due to assertion violation.  The patch below fixes that for me; please
> see if it fixes the display problem for you.
>
> diff --git a/src/fileio.c b/src/fileio.c
> index 6cda1e3..8e44eb0 100644
> --- a/src/fileio.c
> +++ b/src/fileio.c
> @@ -4265,7 +4265,7 @@ by calling `format-decode', which see.  */)
> 	  && NILP (replace))
> 	/* Visiting a file with these coding system makes the buffer
> 	   unibyte.  */
> -	bset_enable_multibyte_characters (current_buffer, Qnil);
> +	Fset_buffer_multibyte (Qnil);
>      }
> 
>    coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_charac\
> ters));
> 

The patch does indeed fix the display problem. Thank you.