bug#71805: master: New interpreted function format prevents native compilation.

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 27 Jun 2024 16:00:58 +0000
> From: Alan Mackenzie <acm@muc.de>
> 
> With a recent master repo (likely also the emacs-30 branch):
> (i) mkdir ~/cc-mode.hg.
> (ii) chdir ~/cc-mode.hg.
> (iii) Copy cc-mode.hg.tar.gz from this bug report to ~/cc-mode.hg.
> (iv) tar -zxf cc-mode.tar.gz.
> The CC Mode source files should now be in the current directory.
> 
> (v) emacs -Q -batch -f batch-byte-compile *.el
> The CC Mode .elc files should now be present.
> 
> (vi) emacs -Q.
> (vii) M-: (push "~/cc-mode.hg" load-path).
> (viii) M-x load-library RET cc-mode RET.
> (ix) (After a brief wait) C-x b *Async-native-compile-log* RET.
> 
> (x) Search the buffer for "#" with C-s or C-r.  This will find the error
> line
> 
> /home/awk/cc-mode.hg/cc-fonts.el: Error Wrong type argument: listp, #[(form) (`(cdr (backquote-process ,form))) nil]
> 
> (where "awk" is your user name).
> 
> The native compiler has thus failed to compile cc-fonts.el, this being
> something to do with the new interpreted form
> 
>     #[(form) (`(cdr (backquote-process ,form))) nil]
> 
> being somewhere where a list form is expected.
> 
> Possibly of interest: (defun (form) (`(cdr (backquote-process ,form)))
> nil] looks like a failed expansion of backquote (see
> lisp/emacs-lisp/backquote.el).

Andrea and Stefan, can you look into this, please?