GNU bug report logs - #41381
28.0.50; Can't compile file containing a local pcase macro

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; Can't compile file containing a local pcase macro
Date: Mon, 18 May 2020 23:23:24 +0200

$ cat test.el
;;; -*- lexical-binding: t; -*-
(pcase-defmacro test () '_)
(defun test () (pcase nil ((test))))

$ emacs -Q -batch -l bytecomp -f batch-byte-compile test.el

In toplevel form:
test.el:3:1: Error: Symbol’s function definition is void: test--pcase-macroexpander

It works if the pcase macro is surrounded with `eval-when-compile', but
that shouldn't be necessary I think.


In GNU Emacs 28.0.50 (build 12, x86_64-pc-linux-gnu, GTK+ Version 3.24.13, cairo version 1.16.0)
 of 2020-05-18
Repository revision: ca7224d5dbfd6f07d537f6159aae8df667a65497
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12007000
System Description: Debian GNU/Linux rodete

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Configured using:
 'configure --enable-gtk-deprecation-warnings --with-modules
 --without-pop --with-mailutils --enable-gcc-warnings=warn-only
 CFLAGS=-O3 LDFLAGS=-O3'

Configured features:
XPM JPEG TIFF GIF PNG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY
LIBSELINUX GNUTLS FREETYPE HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS GTK3 X11
XDBE XIM MODULES THREADS PDUMPER GMP

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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Memory information:
((conses 16 69142 7839)
 (symbols 48 8951 1)
 (strings 32 23800 1837)
 (string-bytes 1 769195)
 (vectors 16 13264)
 (vector-slots 8 181686 6586)
 (floats 8 25 34)
 (intervals 56 208 0)
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Message #8 received at 41381 <at> debbugs.gnu.org (full text, mbox):

From: Pip Cet <pipcet <at> gmail.com>
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: 41381 <at> debbugs.gnu.org
Subject: Re: bug#41381: 28.0.50; Can't compile file containing a local pcase
 macro
Date: Wed, 03 Jun 2020 21:59:36 +0000

Philipp Stephani <p.stephani2 <at> gmail.com> writes:
> $ cat test.el
> ;;; -*- lexical-binding: t; -*-
> (pcase-defmacro test () '_)
> (defun test () (pcase nil ((test))))
>
> $ emacs -Q -batch -l bytecomp -f batch-byte-compile test.el
>
> In toplevel form:
> test.el:3:1: Error: Symbol’s function definition is void: test--pcase-macroexpander
>
> It works if the pcase macro is surrounded with `eval-when-compile', but
> that shouldn't be necessary I think.

Wouldn't it be better to surround the pcase-defmacro call with
(eval-and-compile ...)?

I think it would be great if there were some clever way to make eager
macro expansion less eager, so things like evaluating the following two
expressions one after another

(defmacro foo () 3)

(progn
  (defmacro foo () 4)
  (foo))

would produce the right result (4 rather than 3). That would solve this
problem as well, but it's probably impossible to do with reasonable
performance.

Message #11 received at 41381 <at> debbugs.gnu.org (full text, mbox):

From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: Pip Cet <pipcet <at> gmail.com>
Cc: 41381 <at> debbugs.gnu.org
Subject: Re: bug#41381: 28.0.50;
 Can't compile file containing a local pcase macro
Date: Sat, 6 Jun 2020 21:11:26 +0200

Am Mi., 3. Juni 2020 um 23:59 Uhr schrieb Pip Cet <pipcet <at> gmail.com>:
>
> Philipp Stephani <p.stephani2 <at> gmail.com> writes:
> > $ cat test.el
> > ;;; -*- lexical-binding: t; -*-
> > (pcase-defmacro test () '_)
> > (defun test () (pcase nil ((test))))
> >
> > $ emacs -Q -batch -l bytecomp -f batch-byte-compile test.el
> >
> > In toplevel form:
> > test.el:3:1: Error: Symbol’s function definition is void: test--pcase-macroexpander
> >
> > It works if the pcase macro is surrounded with `eval-when-compile', but
> > that shouldn't be necessary I think.
>
> Wouldn't it be better to surround the pcase-defmacro call with
> (eval-and-compile ...)?

How about neither? This should work without any "eval-when-..." form.

Message #14 received at 41381 <at> debbugs.gnu.org (full text, mbox):

From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: 41381 <at> debbugs.gnu.org, Pip Cet <pipcet <at> gmail.com>
Subject: Re: bug#41381: 28.0.50; Can't compile file containing a local pcase
 macro
Date: Sun, 07 Jun 2020 11:57:47 +0200

Philipp Stephani <p.stephani2 <at> gmail.com> writes:

> How about neither? This should work without any "eval-when-..." form.

That's what I would expect, too.

Michael.

Message #17 received at 41381 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: 41381 <at> debbugs.gnu.org
Subject: Re: bug#41381: 28.0.50; Can't compile file containing a local pcase
 macro
Date: Sat, 31 Jul 2021 18:34:24 +0200

Philipp Stephani <p.stephani2 <at> gmail.com> writes:

> $ cat test.el
> ;;; -*- lexical-binding: t; -*-
> (pcase-defmacro test () '_)
> (defun test () (pcase nil ((test))))
>
> $ emacs -Q -batch -l bytecomp -f batch-byte-compile test.el
>
> In toplevel form:
> test.el:3:1: Error: Symbol’s function definition is void: test--pcase-macroexpander

I'm able to reproduce this in Emacs 27.1, but not on the current trunk,
so I'm going to go ahead and guess that this has been fixed now, and I'm
closing this bug report.  If there's still an issue here, please respond
to the debbugs address and we'll reopen.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #22 received at 41381 <at> debbugs.gnu.org (full text, mbox):

From: Philipp <p.stephani2 <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 41381 <at> debbugs.gnu.org
Subject: Re: bug#41381: 28.0.50; Can't compile file containing a local pcase
 macro
Date: Sat, 31 Jul 2021 18:39:00 +0200

> Am 31.07.2021 um 18:34 schrieb Lars Ingebrigtsen <larsi <at> gnus.org>:
> 
> Philipp Stephani <p.stephani2 <at> gmail.com> writes:
> 
>> $ cat test.el
>> ;;; -*- lexical-binding: t; -*-
>> (pcase-defmacro test () '_)
>> (defun test () (pcase nil ((test))))
>> 
>> $ emacs -Q -batch -l bytecomp -f batch-byte-compile test.el
>> 
>> In toplevel form:
>> test.el:3:1: Error: Symbol’s function definition is void: test--pcase-macroexpander
> 
> I'm able to reproduce this in Emacs 27.1, but not on the current trunk,
> so I'm going to go ahead and guess that this has been fixed now, and I'm
> closing this bug report.  If there's still an issue here, please respond
> to the debbugs address and we'll reopen.

My guess is that this was fixed by commit 88ca2280ba430ad2fa681c72cc6ba8216709e63f.

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