GNU bug report logs - #32352
build sometimes fails with "Directory-local variables error: (invalid-read-syntax #)"

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

From: Markus FFM <markusffm <at> fn.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; build error
Date: Fri, 03 Aug 2018 07:48:07 +0200

build emacs from sources.
error messages:
make -C ../admin/grammars all EMACS="../../src/bootstrap-emacs"
make[3]: Entering directory '/usr/local/src/sdm/emacs/trunk/admin/grammars'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/usr/local/src/sdm/emacs/trunk/admin/grammars'
Directories for loaddefs: . ./calc ./calendar ./cedet ./cedet/ede ./cedet/semantic ./cedet/semantic/analyze ./cedet/semantic/bovine ./cedet/semantic/decorate ./cedet/semantic/symref ./cedet/semantic/wisent ./cedet/srecode ./emacs-lisp ./emulation ./erc ./eshell ./gnus ./image ./international ./language ./leim ./leim/ja-dic ./leim/quail ./mail ./mh-e ./net ./nxml ./org ./play ./progmodes ./textmodes ./url ./vc
  GEN      loaddefs.el
Directory-local variables error: (invalid-read-syntax #)
Error: (void-variable =)
Directory-local variables error: (invalid-read-syntax #)
make[2]: Leaving directory '/usr/local/src/sdm/emacs/trunk/lisp'
make[2]: Entering directory '/usr/local/src/sdm/emacs/trunk/lisp'
  ELC      ../lisp/files.elc
Directory-local variables error: (invalid-read-syntax #)

In toplevel form:
files.el:31:1:Error: Symbol’s value as variable is void: =
make[2]: *** [Makefile:285: ../lisp/files.elc] Error 1
make[2]: Leaving directory '/usr/local/src/sdm/emacs/trunk/lisp'
make[1]: *** [Makefile:733: ../lisp/files.elc] Error 2
make[1]: Leaving directory '/usr/local/src/sdm/emacs/trunk/src'
make: *** [Makefile:418: src] Error 2



In GNU Emacs 27.0.50 (build 29, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2018-08-02 built on INDRA
Repository revision: 2f37ecaefcc61b0bf389f1c1eb3ac1b15105f056
System Description: Fedora 28 (Twenty Eight)

Recent messages:
>>>loaded: GNU Emacs 27.0.50 of 2018-08-02<<<
>>>load time: Friday, August  3, 2018 07:42:43<<<
Desktop: 3 buffers restored, 2 to restore lazily.
For information about GNU Emacs and the GNU system, type C-M-h C-a.
Desktop lazily opening user-profile.el (2 remaining)...done
Desktop lazily opening init.el (1 remaining)...done
Lazy desktop load complete
Making completion list... [2 times]

Configured using:
 'configure --prefix=/opt/emacs --sysconfdir=/etc
 --enable-locallisppath=/usr/local/share/emacs/site-lisp
 --libexecdir=/opt/emacs/lib/ --localstatedir=/usr/local/var
 --enable-largefile --with-x-toolkit=gtk3 --with-sound=no --with-modules
 --with-xwidgets --without-pop --without-selinux --without-gnutls
 --disable-acl --with-file-notification=yes --with-json --without-xml2
 'CFLAGS=-march=native -Os''

Configured features:
XPM JPEG TIFF GIF PNG RSVG GPM DBUS GSETTINGS NOTIFY FREETYPE M17N_FLT
LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 MODULES THREADS XWIDGETS
LIBSYSTEMD JSON

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

Major mode: Info

Minor modes in effect:
  show-paren-mode: t
  recentf-mode: t
  desktop-save-mode: 1
  delete-selection-mode: t
  cua-mode: t
  global-hl-line-mode: t
  gpm-mouse-mode: t
  savehist-mode: t
  global-auto-revert-mode: t
  auto-insert-mode: t
  smooth-scroll-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  save-place-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-quote-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  global-prettify-symbols-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow mail-extr emacsbug message rmc puny rfc822 mml mml-sec epa epg
epg-config gnus-util rmail rmail-loaddefs mm-decode mm-bodies mm-encode
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default-help default-options default-tools default-search default-format
default-view aquamacs-cmm-menu default-edit default-file default-generic
savehist autorevert filenotify autoinsert default-functions elec-pair
default-autoload ox-man ox-odt rng-loc rng-uri rng-parse rng-match
rng-dt rng-util rng-pttrn nxml-parse nxml-ns nxml-enc xmltok nxml-util
ox-latex ox-icalendar ox-html table ox-ascii ox-publish ox org-element
avl-tree generator org org-macro org-footnote org-pcomplete pcomplete
org-list org-faces org-entities time-date org-version ob-emacs-lisp ob
ob-tangle org-src ob-ref ob-lob ob-table ob-keys ob-comint comint
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aok cl fill-column-indicator tempbuf auto-complete-config auto-complete
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url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache url-vars mailcap json map seq byte-opt gv bytecomp
byte-compile cconv cl-loaddefs cl-lib eol-conversion easymenu
default-path tooltip eldoc electric uniquify ediff-hook vc-hooks
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case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
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custom widget hashtable-print-readable backquote threads dbusbind
inotify dynamic-setting system-font-setting font-render-setting
xwidget-internal move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 300072 174730)
 (symbols 48 40316 8)
 (miscs 40 261 630)
 (strings 32 101557 26783)
 (string-bytes 1 3043377)
 (vectors 16 39010)
 (vector-slots 8 742017 213098)
 (floats 8 385 1480)
 (intervals 56 1868 418)
 (buffers 992 26))

Message #8 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: Markus FFM <markusffm <at> fn.de>
Cc: 32352 <at> debbugs.gnu.org
Subject: Re: bug#32352: 27.0.50; build error
Date: Fri, 03 Aug 2018 15:07:00 +0900

On Fri, 03 Aug 2018 07:48:07 +0200, Markus FFM wrote:
> build emacs from sources.
> error messages:
[...]
> Directory-local variables error: (invalid-read-syntax #)
> Error: (void-variable =)

This sometimes happens to me, too :).  Try `make bootstrap'.

Message #11 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Katsumi Yamaoka <yamaoka <at> jpl.org>
Cc: 32352 <at> debbugs.gnu.org, markusffm <at> fn.de
Subject: Re: bug#32352: 27.0.50; build error
Date: Fri, 03 Aug 2018 09:50:06 +0300

> Date: Fri, 03 Aug 2018 15:07:00 +0900
> From: Katsumi Yamaoka <yamaoka <at> jpl.org>
> Cc: 32352 <at> debbugs.gnu.org
> 
> On Fri, 03 Aug 2018 07:48:07 +0200, Markus FFM wrote:
> > build emacs from sources.
> > error messages:
> [...]
> > Directory-local variables error: (invalid-read-syntax #)
> > Error: (void-variable =)
> 
> This sometimes happens to me, too :).  Try `make bootstrap'.

No need to bootstrap: just rename .dir-locals.el and re-run "make",
then rename the file back.

Would someone please look into this annoying problem?  It seems to
happen every time files.el and/or dired.el is changed.

Message #14 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: markusffm <at> fn.de, Katsumi Yamaoka <yamaoka <at> jpl.org>, 32352 <at> debbugs.gnu.org
Subject: Re: bug#32352: 27.0.50; build error
Date: Fri, 03 Aug 2018 08:40:44 -0400

Eli Zaretskii <eliz <at> gnu.org> writes:

> No need to bootstrap: just rename .dir-locals.el and re-run "make",
> then rename the file back.
>
> Would someone please look into this annoying problem?  It seems to
> happen every time files.el and/or dired.el is changed.

    In toplevel form:
    files.el:31:1:Error: Symbol’s value as variable is void: =

Line 31 has this:

(eval-when-compile
  (require 'pcase)
  (require 'easy-mmode)) ; For `define-minor-mode'.

So to narrow it down, I tried changing to

(eval-when-compile
  (require 'pcase))
(eval-when-compile
  (require 'easy-mmode)) ; For `define-minor-mode'.

But then the problem disappeared.  I have no idea if this fixes
anything, or it just covered up the problem until next time.

Message #19 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: markusffm <at> fn.de, Eli Zaretskii <eliz <at> gnu.org>, 32352 <at> debbugs.gnu.org,
 Katsumi Yamaoka <yamaoka <at> jpl.org>
Subject: Re: bug#32352: 27.0.50; build error
Date: Mon, 12 Nov 2018 14:01:40 -0500

I seem to be able to reproduce it at will with (after a bootstrap):

touch lisp/files.el src/emacs.c 
rm src/bootstrap-emacs
make

which dies doing

./src/bootstrap-emacs -batch -f batch-byte-compile lisp/files.el

at (alist-get class dir-locals-class-alist) when gv.elc loads.
(It's fine if you load bytecomp.el instead of .elc.)

See also
http://lists.gnu.org/r/emacs-devel/2018-11/msg00156.html

Message #22 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 32352 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, markusffm <at> fn.de,
 Katsumi Yamaoka <yamaoka <at> jpl.org>
Subject: Re: bug#32352: 27.0.50; build error
Date: Mon, 12 Nov 2018 20:37:09 -0500

Glenn Morris <rgm <at> gnu.org> writes:

> I seem to be able to reproduce it at will with (after a bootstrap):
>
> touch lisp/files.el src/emacs.c 
> rm src/bootstrap-emacs
> make

Ah right, I missed removing bootstrap-emacs.

> which dies doing
>
> ./src/bootstrap-emacs -batch -f batch-byte-compile lisp/files.el
>
> at (alist-get class dir-locals-class-alist) when gv.elc loads.
> (It's fine if you load bytecomp.el instead of .elc.)

Not entirely sure about bytecomp.el vs elc, but the problem seems to be
that files.el binds read-circle over too much code, and gv.elc has some
circular structure in it.  The following patch fixes it:

--- c/lisp/files.el
+++ i/lisp/files.el
@@ -4099,7 +4099,6 @@ dir-locals-read-from-dir
 Return the new class name, which is a symbol named DIR."
   (let* ((class-name (intern dir))
          (files (dir-locals--all-files dir))
-         (read-circle nil)
 	 ;; If there was a problem, use the values we could get but
 	 ;; don't let the cache prevent future reads.
 	 (latest 0) (success 0)
@@ -4114,7 +4113,8 @@ dir-locals-read-from-dir
           (insert-file-contents file)
           (let ((newvars
                  (condition-case-unless-debug nil
-                     (read (current-buffer))
+                     (let ((read-circle nil))
+                       (read (current-buffer)))
                    (end-of-file nil))))
             (setq variables
                   ;; Try and avoid loading `map' since that also loads cl-lib


I guess this could go to emacs-26 (although I'm suddenly unable to build
it today, I get tons of "undefined reference to X" link errors
(including X=main!?)).

Message #25 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: rgm <at> gnu.org, yamaoka <at> jpl.org, 32352 <at> debbugs.gnu.org, markusffm <at> fn.de
Subject: Re: bug#32352: 27.0.50; build error
Date: Tue, 13 Nov 2018 05:35:50 +0200

> From: Noam Postavsky <npostavs <at> gmail.com>
> Cc: markusffm <at> fn.de,  Eli Zaretskii <eliz <at> gnu.org>,  32352 <at> debbugs.gnu.org,  Katsumi Yamaoka <yamaoka <at> jpl.org>
> Date: Mon, 12 Nov 2018 20:37:09 -0500
> 
> Not entirely sure about bytecomp.el vs elc, but the problem seems to be
> that files.el binds read-circle over too much code, and gv.elc has some
> circular structure in it.  The following patch fixes it:
> 
> --- c/lisp/files.el
> +++ i/lisp/files.el
> @@ -4099,7 +4099,6 @@ dir-locals-read-from-dir
>  Return the new class name, which is a symbol named DIR."
>    (let* ((class-name (intern dir))
>           (files (dir-locals--all-files dir))
> -         (read-circle nil)
>  	 ;; If there was a problem, use the values we could get but
>  	 ;; don't let the cache prevent future reads.
>  	 (latest 0) (success 0)
> @@ -4114,7 +4113,8 @@ dir-locals-read-from-dir
>            (insert-file-contents file)
>            (let ((newvars
>                   (condition-case-unless-debug nil
> -                     (read (current-buffer))
> +                     (let ((read-circle nil))
> +                       (read (current-buffer)))
>                     (end-of-file nil))))
>              (setq variables
>                    ;; Try and avoid loading `map' since that also loads cl-lib

Thanks.

> I guess this could go to emacs-26

I see no need to do this on the release branch, especially since a
pretest of Emacs 26.2 is about to be produced.

> (although I'm suddenly unable to build it today, I get tons of
> "undefined reference to X" link errors (including X=main!?)).

Builds fine for me, FWIW.

Message #28 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: rgm <at> gnu.org, yamaoka <at> jpl.org, 32352 <at> debbugs.gnu.org, markusffm <at> fn.de
Subject: Re: bug#32352: 27.0.50; build error
Date: Tue, 13 Nov 2018 08:54:24 -0500

tags 32352 fixed
close 32352 
quit

Eli Zaretskii <eliz <at> gnu.org> writes:

> I see no need to do this on the release branch, especially since a
> pretest of Emacs 26.2 is about to be produced.

Yeah, I there's an easy workaround and we probably won't be changing
files.el all that often on the release branch anyway.  Pushed to master.

[1: 197bf4eaac]: 2018-11-13 08:25:35 -0500
  Fix build fail on files.el change (Bug#32352)
  https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=197bf4eaac0ed98549f4343a653ba21aac47c855>

>> (although I'm suddenly unable to build it today, I get tons of
>> "undefined reference to X" link errors (including X=main!?)).

> Builds fine for me, FWIW.

I'm not surprised, it looks like some kind of toolchain failure (maybe I
have some selective hard drive corruption?  It's very strange...).

Message #35 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: markusffm <at> fn.de, Eli Zaretskii <eliz <at> gnu.org>, 32352 <at> debbugs.gnu.org,
 Katsumi Yamaoka <yamaoka <at> jpl.org>
Subject: Re: bug#32352: 27.0.50; build error
Date: Tue, 13 Nov 2018 08:58:52 -0500

Noam Postavsky <npostavs <at> gmail.com> writes:

>> which dies doing
>>
>> ./src/bootstrap-emacs -batch -f batch-byte-compile lisp/files.el
>>
>> at (alist-get class dir-locals-class-alist) when gv.elc loads.
>> (It's fine if you load bytecomp.el instead of .elc.)
>
> Not entirely sure about bytecomp.el vs elc,

Just for the record, the reason it works with bytecomp.el is that an
uncompiled bytecomp triggers loading of gv earlier, and so avoids the
problem by reading it while read-circle is not bound to nil.

Message #38 received at 32352 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: 32352 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, markusffm <at> fn.de,
 Katsumi Yamaoka <yamaoka <at> jpl.org>
Subject: Re: bug#32352: 27.0.50; build error
Date: Tue, 13 Nov 2018 13:10:27 -0500

Noam Postavsky wrote:

> that files.el binds read-circle over too much code, and gv.elc has some
> circular structure in it.  The following patch fixes it:

Fantastic work! :)

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