Subject: bug#5989: 23.1.96; bug 4209 not completely fixed (regression in re-search-forward)

From: Eli Zaretskii <[email-masked]>
Date: Sat, 04 Jun 2016 19:15:50 +0300

> Date: Wed, 1 Jun 2016 21:29:36 -0400
> From: Noam Postavsky <[email-masked]>
> 
> I can reproduce this on recent Emacs, with a small change to the
> recipe since enable-multibyte-characters can no longer be set
> directly:
> 
> (set-buffer (get-buffer-create "*Test Buffer*"))
> (set-buffer-multibyte nil) ; instead of setting `enable-multibyte-characters'
> 
> (insert "\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A")
> 
> (goto-char (point-min))
> 
> (message "looking-at: %s" (looking-at
> "\\`\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A"))
> 
> (message "re-search-forward: %s"
>          (re-search-forward "\\`\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A" 100 t))

If you don't make the buffer unibyte, everything works as expected.
Using multibyte buffers even for raw bytes is what we recommend.  So I
see no problem here that we should work on: unibyte buffers are not
meant to process text.

Thanks.