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Subject: bug#76615: 14.0.9; error with amsmath style hooks
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Hi all,

Evaluating the following after Emacs -Q

(progn
  (package-initialize)
  (package-activate 'auctex)
  (add-hook 'LaTeX-mode-hook #'turn-on-reftex)
  (with-temp-buffer
    (LaTeX-mode)
    (TeX-run-style-hooks "amsmath")))

gives the backtrace:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  expand-file-name(nil)
  reftex-TeX-master-file()
  reftex-tie-multifile-symbols()
  reftex-add-to-label-alist((AMSTeX))
  #f(compiled-function () #<bytecode 0x1528d667892913ee>)()
  #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_105>([TeX-style-hook #f(compiled-function () #<bytecode 0x1528d667892913ee>) 1])
  mapcar(#<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_105> ([TeX-style-hook #f(compiled-function () #<bytecode 0x1528d667892913ee>) 1]))
  #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_106>("amsmath")
  TeX-run-style-hooks("amsmath")
  (progn (LaTeX-mode) (TeX-run-style-hooks "amsmath"))
  (unwind-protect (progn (LaTeX-mode) (TeX-run-style-hooks "amsmath")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))
  (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (LaTeX-mode) (TeX-run-style-hooks "amsmath")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer))))
  (let ((temp-buffer (generate-new-buffer " *temp*" t))) (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (LaTeX-mode) (TeX-run-style-hooks "amsmath")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))
  (progn (package-initialize) (package-activate 'auctex) (add-hook 'LaTeX-mode-hook #'turn-on-reftex) (let ((temp-buffer (generate-new-buffer " *temp*" t))) (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (LaTeX-mode) (TeX-run-style-hooks "amsmath")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer))))))
  eval((progn (package-initialize) (package-activate 'auctex) (add-hook 'LaTeX-mode-hook #'turn-on-reftex) (let ((temp-buffer (generate-new-buffer " *temp*" t))) (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (LaTeX-mode) (TeX-run-style-hooks "amsmath")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))) nil)
  elisp--eval-last-sexp(nil)
  #f(compiled-function () #<bytecode 0x1866e7a2d80a>)()
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  command-execute(eval-last-sexp)

I tried this on both the latest AUCTeX release and some earlier 14.0.4
that was lying around.

The issue arose when using log-edit-generate-changelog-from-diff for a
commit involving tex files.  I distilled it down to the above example.

It's clear what's happening -- reftex expects a master file, but it's a
non-file buffer.  I don't know enough about style hooks to diagnose why
reftex is being called in this manner in this situation.

Any suggestions would be welcome.

Thanks, best,

Paul



Emacs  : GNU Emacs 31.0.50 (build 2, aarch64-apple-darwin24.1.0, NS appkit-2575.20 Version 15.1.1 (Build 24B91))
 of 2025-02-27
Package: 14.0.9

current state:
==============
(setq
 window-system 'ns
 LaTeX-version "2e"
 TeX-style-path '("~/.emacs.d/auctex/" "/Users/au710211/.emacs.d/elpa/auctex-14.0.9/style"
		  "/Users/au710211/.emacs.d/auctex/auto" "/Users/au710211/.emacs.d/auctex/style" "auto" "style")
 TeX-auto-save nil
 TeX-parse-self nil
 TeX-master t
 TeX-command-list '(("TeX" "%(PDF)%(tex) %(file-line-error) %`%(extraopts) %S%(PDFout)%(mode)%' %(output-dir) %t"
		     TeX-run-TeX nil (plain-TeX-mode AmSTeX-mode Texinfo-mode) :help "Run plain TeX")
		    ("LaTeX" "%`%l%(mode)%' %T" TeX-run-TeX nil (LaTeX-mode docTeX-mode) :help "Run LaTeX")
		    ("Makeinfo" "makeinfo %(extraopts) %(o-dir) %t" TeX-run-compile nil (Texinfo-mode) :help
		     "Run Makeinfo with Info output")
		    ("Makeinfo HTML" "makeinfo %(extraopts) %(o-dir) --html %t" TeX-run-compile nil (Texinfo-mode)
		     :help "Run Makeinfo with HTML output")
		    ("AmSTeX" "amstex %(PDFout) %`%(extraopts) %S%(mode)%' %(output-dir) %t" TeX-run-TeX nil
		     (AmSTeX-mode) :help "Run AMSTeX")
		    ("ConTeXt" "%(cntxcom) --once %(extraopts) %(execopts)%t" TeX-run-TeX nil (ConTeXt-mode) :help
		     "Run ConTeXt once")
		    ("ConTeXt Full" "%(cntxcom) %(extraopts) %(execopts)%t" TeX-run-TeX nil (ConTeXt-mode) :help
		     "Run ConTeXt until completion")
		    ("BibTeX" "bibtex %(O?aux)" TeX-run-BibTeX nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode ConTeXt-mode) :help
		     "Run BibTeX")
		    ("Biber" "biber %(output-dir) %s" TeX-run-Biber nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Run Biber")
		    ("Texindex" "texindex %s.??" TeX-run-command nil (Texinfo-mode) :help "Run Texindex")
		    ("Texi2dvi" "%(PDF)texi2dvi %t" TeX-run-command nil (Texinfo-mode) :help
		     "Run Texi2dvi or Texi2pdf")
		    ("View" "%V" TeX-run-discard-or-function t t :help "Run Viewer")
		    ("Print" "%p" TeX-run-command t t :help "Print the file")
		    ("Queue" "%q" TeX-run-background nil t :help "View the printer queue" :visible
		     TeX-queue-command)
		    ("File" "%(o?)dvips %d -o %f " TeX-run-dvips t
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Generate PostScript file")
		    ("Dvips" "%(o?)dvips %d -o %f " TeX-run-dvips nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Convert DVI file to PostScript")
		    ("Dvipdfmx" "dvipdfmx -o %(O?pdf) %d" TeX-run-dvipdfmx nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Convert DVI file to PDF with dvipdfmx")
		    ("Ps2pdf" "ps2pdf %f %(O?pdf)" TeX-run-ps2pdf nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Convert PostScript file to PDF")
		    ("LaTeXMk"
		     "latexmk %(latexmk-out) %(file-line-error) %(output-dir) %`%(extraopts) %S%(mode)%' %t"
		     TeX-run-TeX nil (LaTeX-mode docTeX-mode) :help "Run LaTeXMk")
		    ("Glossaries" "makeglossaries %(d-dir) %s" TeX-run-command nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Run makeglossaries to create glossary file")
		    ("Index" "makeindex %(O?idx)" TeX-run-index nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Run makeindex to create index file")
		    ("upMendex" "upmendex %(O?idx)" TeX-run-index t
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Run upmendex to create index file")
		    ("Xindy" "texindy %s" TeX-run-command nil
		     (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
		     "Run xindy to create index file")
		    ("Check" "lacheck %s" TeX-run-compile nil (LaTeX-mode) :help "Check LaTeX file for correctness")
		    ("ChkTeX" "chktex -v6 %s" TeX-run-compile nil (LaTeX-mode) :help
		     "Check LaTeX file for common mistakes")
		    ("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil t :help "Spell-check the document")
		    ("Clean" "TeX-clean" TeX-run-function nil t :help "Delete generated intermediate files")
		    ("Clean All" "(TeX-clean t)" TeX-run-function nil t :help
		     "Delete generated intermediate and output files")
		    ("Other" "" TeX-run-command t t :help "Run an arbitrary command"))
 )

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: "Paul D. Nelson" <ultrono@HIDDEN>
Subject: bug#76615: Acknowledgement (14.0.9; error with amsmath style hooks)
Message-ID: <handler.76615.B.17406810044016.ack <at> debbugs.gnu.org>
References: <uxsg7tcyf3nsws.fsf@HIDDEN>
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Subject: bug#76615: 14.0.9; error with amsmath style hooks
Resent-From: Arash Esbati <arash@HIDDEN>
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Date: Fri, 28 Feb 2025 08:52:02 +0100
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Hi Paul,

"Paul D. Nelson" <ultrono@HIDDEN> writes:

> Evaluating the following after Emacs -Q
>
> (progn
>   (package-initialize)
>   (package-activate 'auctex)
>   (add-hook 'LaTeX-mode-hook #'turn-on-reftex)
>   (with-temp-buffer
>     (LaTeX-mode)
>     (TeX-run-style-hooks "amsmath")))
>
> gives the backtrace:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   expand-file-name(nil)
>   reftex-TeX-master-file()
>   reftex-tie-multifile-symbols()
>   reftex-add-to-label-alist((AMSTeX))

I think this is because of this part of amsmath.el[1]:

   ;; RefTeX support: Tell RefTeX about amsmath environments.
   (when (fboundp 'reftex-add-to-label-alist)
     (reftex-add-to-label-alist '(AMSTeX)))

> The issue arose when using log-edit-generate-changelog-from-diff for a
> commit involving tex files.  I distilled it down to the above example.

I'd say the form above was in amsmath.el since forever :-)

HTH.  Best, Arash

Footnotes:
[1]  https://git.savannah.gnu.org/cgit/auctex.git/tree/style/amsmath.el#n165

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Subject: bug#76615: 14.0.9; error with amsmath style hooks
References: <uxsg7tcyf3nsws.fsf@HIDDEN>
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From: "Paul D. Nelson" <ultrono@HIDDEN>
In-Reply-To: <m21pvi8q1p.fsf@HIDDEN> (message from Arash Esbati
 on Fri, 28 Feb 2025 08:52:02 +0100)
Date: Fri, 28 Feb 2025 16:21:49 +0100
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--=-=-=
Content-Type: text/plain

Hi Arash,

>
> I think this is because of this part of amsmath.el[1]:
>
>    ;; RefTeX support: Tell RefTeX about amsmath environments.
>    (when (fboundp 'reftex-add-to-label-alist)
>      (reftex-add-to-label-alist '(AMSTeX)))
>
>> The issue arose when using log-edit-generate-changelog-from-diff for a
>> commit involving tex files.  I distilled it down to the above example.
>
> I'd say the form above was in amsmath.el since forever :-)
>

Indeed.

The attached patch addresses the issue for me.  Thoughts?

Paul

--=-=-=
Content-Type: text/plain
Content-Disposition: inline

diff --git a/style/amsmath.el b/style/amsmath.el
index 9d6944dc..68cd5983 100644
--- a/style/amsmath.el
+++ b/style/amsmath.el
@@ -163,7 +163,8 @@
    (TeX-run-style-hooks "amstext" "amsbsy" "amsopn")

    ;; RefTeX support: Tell RefTeX about amsmath environments.
-   (when (fboundp 'reftex-add-to-label-alist)
+   (when (and (fboundp 'reftex-add-to-label-alist)
+              (buffer-file-name))
      (reftex-add-to-label-alist '(AMSTeX)))

    ;; Add \eqref to `reftex-ref-style-alist' and associate it to `e'
@@ -180,6 +181,7 @@
    ;; is non-nil
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "AMSmath"))

    (when (and (featurep 'font-latex)

--=-=-=--

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From: "Paul D. Nelson" <ultrono@HIDDEN>
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--=-=-=
Content-Type: text/plain

"Paul D. Nelson" <ultrono@HIDDEN> writes:

>
> The attached patch addresses the issue for me.  Thoughts?
>

Here's a more complete version, addressing related issues.  This feels a
bit like plugging a leak with a band-aid, so other suggestions would
also be welcome.


--=-=-=
Content-Type: text/plain
Content-Disposition: inline

diff --git a/style/amsmath.el b/style/amsmath.el
index 9d6944dc..68cd5983 100644
--- a/style/amsmath.el
+++ b/style/amsmath.el
@@ -163,7 +163,8 @@
    (TeX-run-style-hooks "amstext" "amsbsy" "amsopn")
 
    ;; RefTeX support: Tell RefTeX about amsmath environments.
-   (when (fboundp 'reftex-add-to-label-alist)
+   (when (and (fboundp 'reftex-add-to-label-alist)
+              (buffer-file-name))
      (reftex-add-to-label-alist '(AMSTeX)))
 
    ;; Add \eqref to `reftex-ref-style-alist' and associate it to `e'
@@ -180,6 +181,7 @@
    ;; is non-nil
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "AMSmath"))
 
    (when (and (featurep 'font-latex)
diff --git a/style/cleveref.el b/style/cleveref.el
index 129d4ce1..67bece8b 100644
--- a/style/cleveref.el
+++ b/style/cleveref.el
@@ -211,6 +211,7 @@ string."
    ;; Activate RefTeX reference style.
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "Cleveref")))
  TeX-dialect)
 
diff --git a/style/fancyref.el b/style/fancyref.el
index d2d87bf5..a580fcbf 100644
--- a/style/fancyref.el
+++ b/style/fancyref.el
@@ -103,6 +103,7 @@
    ;; Activate RefTeX reference style.
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "Fancyref")))
  TeX-dialect)
 
diff --git a/style/hyperref.el b/style/hyperref.el
index 868acd33..e801140b 100644
--- a/style/hyperref.el
+++ b/style/hyperref.el
@@ -343,6 +343,7 @@
    ;; Activate RefTeX reference style.
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "Hyperref")))
  TeX-dialect)
 
diff --git a/style/refcount.el b/style/refcount.el
index e20ef395..560855c0 100644
--- a/style/refcount.el
+++ b/style/refcount.el
@@ -79,6 +79,7 @@
    ;; Activate RefTeX reference style
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "Refcount")))
  TeX-dialect)
 
diff --git a/style/varioref.el b/style/varioref.el
index e7f95f7f..b149d4de 100644
--- a/style/varioref.el
+++ b/style/varioref.el
@@ -90,6 +90,7 @@
    ;; Activate RefTeX reference style.
    (and LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
+        (buffer-file-name)
         (reftex-ref-style-activate "Varioref")))
  TeX-dialect)
 

--=-=-=--

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X-Loop: help-debbugs@HIDDEN
Subject: bug#76615: 14.0.9; error with amsmath style hooks
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 message dated "Fri, 28 Feb 2025 08:52:02 +0100."
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Hi Paul and Arash,

>>>>> Arash Esbati <arash@HIDDEN> writes:
> "Paul D. Nelson" <ultrono@HIDDEN> writes:

>> Evaluating the following after Emacs -Q
>> 
>> (progn
>> (package-initialize)
>> (package-activate 'auctex)
>> (add-hook 'LaTeX-mode-hook #'turn-on-reftex)
>> (with-temp-buffer
>> (LaTeX-mode)
>> (TeX-run-style-hooks "amsmath")))
>> 
>> gives the backtrace:
>> 
>> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>> expand-file-name(nil)
>> reftex-TeX-master-file()
>> reftex-tie-multifile-symbols()
>> reftex-add-to-label-alist((AMSTeX))

> I think this is because of this part of amsmath.el[1]:

>    ;; RefTeX support: Tell RefTeX about amsmath environments.
>    (when (fboundp 'reftex-add-to-label-alist)
>      (reftex-add-to-label-alist '(AMSTeX)))

I tried commenting out this part, but it still fails at another part im
amsmath.el:
   (and LaTeX-reftex-ref-style-auto-activate
        (fboundp 'reftex-ref-style-activate)
        (reftex-ref-style-activate "AMSmath"))

>> The issue arose when using log-edit-generate-changelog-from-diff for a
>> commit involving tex files.  I distilled it down to the above example.

> I'd say the form above was in amsmath.el since forever :-)

The fundamental origin of the problem is that RefTeX presumes that it
always works in the buffer associated with files. In other words, RefTeX
pays no attention to non-file buffer. (I have such impression, skimming
over the RefTeX code. Please correct me if I'm wrong.)

>>>>> "Paul D. Nelson" <ultrono@HIDDEN> writes:
> The attached patch addresses the issue for me.  Thoughts?

I have basically the same idea, but I think such partial treatment
inctroduces inconsistent internal state of RefTeX and can be potential
problems. Rather I propose to wrap the whole RefTeX management
part in amsmath.el by (when buffer-file-name ... ). In addition, we
should turn off RefTeX mode in `TeX-mode-cleanup' like
  (unless buffer-file-truename
    (if (bound-and-true-p reftex-mode) <-- addition
      (reftex-mode -1))                <-- addition
    (TeX-update-style))
to avoid inconsistency.

Regards,
Ikumi Keita
#StandWithUkraine #StopWarInUkraine
#Gaza #StopMassiveKilling #CeasefireNOW

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--=-=-=
Content-Type: text/plain

Hi Ikumi,

>
> The fundamental origin of the problem is that RefTeX presumes that it
> always works in the buffer associated with files. In other words, RefTeX
> pays no attention to non-file buffer. (I have such impression, skimming
> over the RefTeX code. Please correct me if I'm wrong.)
>

This has also been my understanding (although I stopped using RefTeX
years ago, basically for this reason).

>>>>>> "Paul D. Nelson" <ultrono@HIDDEN> writes:
>> The attached patch addresses the issue for me.  Thoughts?
>
> I have basically the same idea, but I think such partial treatment
> inctroduces inconsistent internal state of RefTeX and can be potential
> problems. Rather I propose to wrap the whole RefTeX management
> part in amsmath.el by (when buffer-file-name ... ). In addition, we
> should turn off RefTeX mode in `TeX-mode-cleanup' like
>   (unless buffer-file-truename
>     (if (bound-and-true-p reftex-mode) <-- addition
>       (reftex-mode -1))                <-- addition
>     (TeX-update-style))
> to avoid inconsistency.
>

Something like the attached, I guess?  There are other uses of "reftex-"
in style/, so I guess something similar should be done for all of them?

Thanks, best,

Paul


--=-=-=
Content-Type: text/plain
Content-Disposition: inline

diff --git a/style/amsmath.el b/style/amsmath.el
index 9d6944dc..c73f7475 100644
--- a/style/amsmath.el
+++ b/style/amsmath.el
@@ -163,24 +163,25 @@
    (TeX-run-style-hooks "amstext" "amsbsy" "amsopn")
 
    ;; RefTeX support: Tell RefTeX about amsmath environments.
-   (when (fboundp 'reftex-add-to-label-alist)
-     (reftex-add-to-label-alist '(AMSTeX)))
-
-   ;; Add \eqref to `reftex-ref-style-alist' and associate it to `e'
-   (when (and (boundp 'reftex-ref-style-alist)
-              ;; check if Emacs is already equipped with this
-              (not (assoc "AMSmath" reftex-ref-style-alist)))
-     ;; Append it to a local version in order to avoid a clash with
-     ;; user settings
-     (add-to-list (make-local-variable 'reftex-ref-style-alist)
-                  '("AMSmath" "amsmath" (("\\eqref" ?e)))
-                  t))
-
-   ;; Activate `AMSmath' when `LaTeX-reftex-ref-style-auto-activate'
-   ;; is non-nil
-   (and LaTeX-reftex-ref-style-auto-activate
-        (fboundp 'reftex-ref-style-activate)
-        (reftex-ref-style-activate "AMSmath"))
+   (when buffer-file-truename
+     (when (fboundp 'reftex-add-to-label-alist)
+       (reftex-add-to-label-alist '(AMSTeX)))
+
+     ;; Add \eqref to `reftex-ref-style-alist' and associate it to `e'
+     (when (and (boundp 'reftex-ref-style-alist)
+                ;; check if Emacs is already equipped with this
+                (not (assoc "AMSmath" reftex-ref-style-alist)))
+       ;; Append it to a local version in order to avoid a clash with
+       ;; user settings
+       (add-to-list (make-local-variable 'reftex-ref-style-alist)
+                    '("AMSmath" "amsmath" (("\\eqref" ?e)))
+                    t))
+
+     ;; Activate `AMSmath' when `LaTeX-reftex-ref-style-auto-activate'
+     ;; is non-nil
+     (and LaTeX-reftex-ref-style-auto-activate
+          (fboundp 'reftex-ref-style-activate)
+          (reftex-ref-style-activate "AMSmath")))
 
    (when (and (featurep 'font-latex)
               (eq TeX-install-font-lock 'font-latex-setup))

--=-=-=--

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Subject: bug#76615: 14.0.9; error with amsmath style hooks
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Hi Paul,

>>>>> "Paul D. Nelson" <ultrono@HIDDEN> writes:
> Something like the attached, I guess?

Yes, that's what I thought.

> There are other uses of "reftex-" in style/, so I guess something
> similar should be done for all of them?

Ideally, yes. (But it seems tedious... Does anyone see possibility to
tame RefTeX to live along with non-file buffer?)

Regards,
Ikumi Keita
#StandWithUkraine #StopWarInUkraine
#Gaza #StopMassiveKilling #CeasefireNOW

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Subject: bug#76615: 14.0.9; error with amsmath style hooks
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--=-=-=
Content-Type: text/plain


>> There are other uses of "reftex-" in style/, so I guess something
>> similar should be done for all of them?
>
> Ideally, yes. (But it seems tedious... Does anyone see possibility to
> tame RefTeX to live along with non-file buffer?)
>

Making RefTeX work well with non-file buffers always seemed to me like a
major undertaking.  The commands

;; reftex-add-index-macros
;; reftex-add-section-levels
;; reftex-add-label-environments
;; reftex-scanning-info-available-p
;; reftex-access-parse-file
;; reftex-access-scan-info
;; reftex-ref-style-list
;; reftex-ref-style-toggle
;; reftex-set-cite-format

each call reftex-tie-multifile-symbols, which in turn calls
reftex-TeX-master-file, which fails (with a hard landing) in a non-file
buffer for which TeX-master has not been set to a tex file.

The attached patch wraps the calls from style files to such functions
with a check for buffer-true-filename (although I would also prefer a
less tedious way to address the underlying issue).


--=-=-=
Content-Type: text/x-patch
Content-Disposition: attachment; filename=changes.patch
Content-Description: changes

diff --git a/style/alphanum.el b/style/alphanum.el
index 318281b4..37ff8f8b 100644
--- a/style/alphanum.el
+++ b/style/alphanum.el
@@ -92,10 +92,11 @@
    ;; this won't work in multifile documents, but at least there is
    ;; something.
 
-   (if (fboundp 'reftex-add-section-levels)
-       (reftex-add-section-levels
-        '(("toc" .  reftex-get-section-level-alphanum)
-          ("sub" .  reftex-get-section-level-alphanum)))))
+   (when (and buffer-file-truename
+              (fboundp 'reftex-add-section-levels))
+     (reftex-add-section-levels
+      '(("toc" .  reftex-get-section-level-alphanum)
+        ("sub" .  reftex-get-section-level-alphanum)))))
  TeX-dialect)
 
 ;; Local Variables:
diff --git a/style/amsmath.el b/style/amsmath.el
index 9d6944dc..c73f7475 100644
--- a/style/amsmath.el
+++ b/style/amsmath.el
@@ -163,24 +163,25 @@
    (TeX-run-style-hooks "amstext" "amsbsy" "amsopn")
 
    ;; RefTeX support: Tell RefTeX about amsmath environments.
-   (when (fboundp 'reftex-add-to-label-alist)
-     (reftex-add-to-label-alist '(AMSTeX)))
-
-   ;; Add \eqref to `reftex-ref-style-alist' and associate it to `e'
-   (when (and (boundp 'reftex-ref-style-alist)
-              ;; check if Emacs is already equipped with this
-              (not (assoc "AMSmath" reftex-ref-style-alist)))
-     ;; Append it to a local version in order to avoid a clash with
-     ;; user settings
-     (add-to-list (make-local-variable 'reftex-ref-style-alist)
-                  '("AMSmath" "amsmath" (("\\eqref" ?e)))
-                  t))
-
-   ;; Activate `AMSmath' when `LaTeX-reftex-ref-style-auto-activate'
-   ;; is non-nil
-   (and LaTeX-reftex-ref-style-auto-activate
-        (fboundp 'reftex-ref-style-activate)
-        (reftex-ref-style-activate "AMSmath"))
+   (when buffer-file-truename
+     (when (fboundp 'reftex-add-to-label-alist)
+       (reftex-add-to-label-alist '(AMSTeX)))
+
+     ;; Add \eqref to `reftex-ref-style-alist' and associate it to `e'
+     (when (and (boundp 'reftex-ref-style-alist)
+                ;; check if Emacs is already equipped with this
+                (not (assoc "AMSmath" reftex-ref-style-alist)))
+       ;; Append it to a local version in order to avoid a clash with
+       ;; user settings
+       (add-to-list (make-local-variable 'reftex-ref-style-alist)
+                    '("AMSmath" "amsmath" (("\\eqref" ?e)))
+                    t))
+
+     ;; Activate `AMSmath' when `LaTeX-reftex-ref-style-auto-activate'
+     ;; is non-nil
+     (and LaTeX-reftex-ref-style-auto-activate
+          (fboundp 'reftex-ref-style-activate)
+          (reftex-ref-style-activate "AMSmath")))
 
    (when (and (featurep 'font-latex)
               (eq TeX-install-font-lock 'font-latex-setup))
diff --git a/style/beamer.el b/style/beamer.el
index fe1e4611..4afa2973 100644
--- a/style/beamer.el
+++ b/style/beamer.el
@@ -605,7 +605,8 @@ also be a string.  Then the length of the string is used."
     (insert LaTeX-title TeX-grcl)
     (LaTeX-newline)
     ;; If RefTeX is available, tell it that we've just made a new section
-    (and (fboundp 'reftex-notice-new-section)
+    (and buffer-file-truename
+         (fboundp 'reftex-notice-new-section)
          (reftex-notice-new-section))))
 
 (defvar LaTeX-beamer-class-options-list
diff --git a/style/biblatex.el b/style/biblatex.el
index 8b2c6b7a..c8d58740 100644
--- a/style/biblatex.el
+++ b/style/biblatex.el
@@ -672,7 +672,8 @@ for citation keys."
 
    ;; Tell RefTeX: If package option `natbib' is given, activate that
    ;; format, otherwise stick with `biblatex':
-   (when (and LaTeX-reftex-cite-format-auto-activate
+   (when (and buffer-file-truename
+              LaTeX-reftex-cite-format-auto-activate
               (fboundp 'reftex-set-cite-format))
      (if (or (LaTeX-provided-package-options-member "biblatex" "natbib")
              (LaTeX-provided-package-options-member "biblatex" "natbib=true"))
@@ -708,22 +709,22 @@ for citation keys."
    ;;; Preamble Options
    LaTeX-biblatex-executebibliographyoptions-options
    '(;;; Load-time Options
-    ("backend" ("biber" "bibtex" "bibtexu" "bibtex8"))
-    ("style" BibLaTeX-global-style-files)
-    ("bibstyle" BibLaTeX-global-style-files)
-    ("citestyle" BibLaTeX-global-style-files)
-    ("natbib" ("true" "false"))
-    ("mcite" ("true" "false"))
+     ("backend" ("biber" "bibtex" "bibtexu" "bibtex8"))
+     ("style" BibLaTeX-global-style-files)
+     ("bibstyle" BibLaTeX-global-style-files)
+     ("citestyle" BibLaTeX-global-style-files)
+     ("natbib" ("true" "false"))
+     ("mcite" ("true" "false"))
     ;;; Entry Options
-    ;; Preamble/Type/Entry Options
-    ("useauthor" ("true" "false"))
-    ("useeditor" ("true" "false"))
-    ("usetranslator" ("true" "false"))
-    ("useprefix" ("true" "false"))
-    ("indexing" ("true" "false" "cite" "bib"))
-    ;; Type/Entry Options are not available globally.
-    ;; Legacy Options (deprecated)
-    ("openbib")))
+     ;; Preamble/Type/Entry Options
+     ("useauthor" ("true" "false"))
+     ("useeditor" ("true" "false"))
+     ("usetranslator" ("true" "false"))
+     ("useprefix" ("true" "false"))
+     ("indexing" ("true" "false" "cite" "bib"))
+     ;; Type/Entry Options are not available globally.
+     ;; Legacy Options (deprecated)
+     ("openbib")))
   "Package options for the biblatex package.")
 
 (defun LaTeX-biblatex-package-options nil
diff --git a/style/breqn.el b/style/breqn.el
index f2784bf9..5b4db486 100644
--- a/style/breqn.el
+++ b/style/breqn.el
@@ -102,7 +102,8 @@ The keys \"label\" and \"labelprefix\" are omitted.")
    ;; dseries   == equation   -- dseries* == unnumbered
    ;; dgroup    == align      -- dgroup*  == unnumbered
    ;; darray    == eqnarray   -- darray*  == unnumbered
-   (when (fboundp 'reftex-add-label-environments)
+   (when (and buffer-file-truename
+              (fboundp 'reftex-add-label-environments))
      (dolist (env '("dmath" "dseries" "dgroup"))
        (reftex-add-label-environments `((,env ?e nil nil t))))
      (reftex-add-label-environments '(("darray" ?e nil nil eqnarray-like))))
diff --git a/style/cleveref.el b/style/cleveref.el
index 129d4ce1..ceed42d6 100644
--- a/style/cleveref.el
+++ b/style/cleveref.el
@@ -209,7 +209,8 @@ string."
                               'function))
 
    ;; Activate RefTeX reference style.
-   (and LaTeX-reftex-ref-style-auto-activate
+   (and buffer-file-truename
+        LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
         (reftex-ref-style-activate "Cleveref")))
  TeX-dialect)
diff --git a/style/empheq.el b/style/empheq.el
index 31c22eaf..ffbb8e92 100644
--- a/style/empheq.el
+++ b/style/empheq.el
@@ -252,7 +252,8 @@ number of ampersands if possible."
    (add-to-list 'LaTeX-item-list '("empheq" . LaTeX-empheq-item-equation) t)
 
    ;; Reftex support: Use `reftex-add-label-environments'
-   (when (fboundp 'reftex-add-label-environments)
+   (when (and buffer-file-truename
+              (fboundp 'reftex-add-label-environments))
      (reftex-add-label-environments '(("empheq" ?e nil nil t))))
 
    (TeX-add-symbols
@@ -398,7 +399,8 @@ number of ampersands if possible."
          (add-to-list 'LaTeX-label-alist `(,env . LaTeX-amsmath-label) t)))
 
      ;; RefTeX support: Add original definitions with `reftex-add-label-environments'
-     (when (fboundp 'reftex-add-label-environments)
+     (when (and buffer-file-truename
+                (fboundp 'reftex-add-label-environments))
        (reftex-add-label-environments
         '(("AmSalign"     ?e nil nil eqnarray-like)
           ("AmSequation"  ?e nil nil t)
diff --git a/style/exam.el b/style/exam.el
index 64179192..ee250dae 100644
--- a/style/exam.el
+++ b/style/exam.el
@@ -87,7 +87,8 @@ Arguments NAME and TYPE are the same as for the function
        (add-to-list 'LaTeX-label-alist
                     (cons env 'LaTeX-exam-label))
        ;; to RefTeX with `reftex-add-label-environments'
-       (when (fboundp 'reftex-add-label-environments)
+       (when (and buffer-file-truename
+                  (fboundp 'reftex-add-label-environments))
          (reftex-add-label-environments
           `((,env ,LaTeX-exam-reftex-quick-id-key ,LaTeX-exam-label
                   "~\\ref{%s}" nil
diff --git a/style/fancyref.el b/style/fancyref.el
index d2d87bf5..6b71a7cd 100644
--- a/style/fancyref.el
+++ b/style/fancyref.el
@@ -101,7 +101,8 @@
      (font-latex-add-keywords '(("fref" "[{") ("Fref" "[{")) 'reference))
 
    ;; Activate RefTeX reference style.
-   (and LaTeX-reftex-ref-style-auto-activate
+   (and buffer-file-truename
+        LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
         (reftex-ref-style-activate "Fancyref")))
  TeX-dialect)
diff --git a/style/harvard.el b/style/harvard.el
index 36e2e471..431e72b5 100644
--- a/style/harvard.el
+++ b/style/harvard.el
@@ -101,7 +101,8 @@
                LaTeX-item-list))
 
    ;; Tell RefTeX
-   (when (and LaTeX-reftex-cite-format-auto-activate
+   (when (and buffer-file-truename
+              LaTeX-reftex-cite-format-auto-activate
               (fboundp 'reftex-set-cite-format))
      (reftex-set-cite-format 'harvard)))
  TeX-dialect)
diff --git a/style/hyperref.el b/style/hyperref.el
index 868acd33..03f7575f 100644
--- a/style/hyperref.el
+++ b/style/hyperref.el
@@ -341,7 +341,8 @@
          (TeX-run-style-hooks "backref"))))
 
    ;; Activate RefTeX reference style.
-   (and LaTeX-reftex-ref-style-auto-activate
+   (and buffer-file-truename
+        LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
         (reftex-ref-style-activate "Hyperref")))
  TeX-dialect)
diff --git a/style/imakeidx.el b/style/imakeidx.el
index 0d6a626c..ae0efce5 100644
--- a/style/imakeidx.el
+++ b/style/imakeidx.el
@@ -93,7 +93,8 @@
          (append
           '(("|see{\\([^{}\n\r]*\\)" 1 LaTeX-index-entry-list))
           TeX-complete-list))
-   (and (fboundp 'reftex-add-index-macros)
+   (and buffer-file-truename
+        (fboundp 'reftex-add-index-macros)
         (reftex-add-index-macros '(default)))
 
    ;; Fontification
diff --git a/style/index.el b/style/index.el
index 1e5657e6..9e370fad 100644
--- a/style/index.el
+++ b/style/index.el
@@ -75,7 +75,8 @@
           TeX-complete-list))
 
    ;; RefTeX support
-   (and (fboundp 'reftex-add-index-macros)
+   (and buffer-file-truename
+        (fboundp 'reftex-add-index-macros)
         (reftex-add-index-macros '(index))))
  TeX-dialect)
 
diff --git a/style/jurabib.el b/style/jurabib.el
index 0aa6966d..532a3cfa 100644
--- a/style/jurabib.el
+++ b/style/jurabib.el
@@ -153,7 +153,8 @@
                                 'variable))
 
      ;; Tell RefTeX (Thanks, Carsten)
-     (when (and LaTeX-reftex-cite-format-auto-activate
+     (when (and buffer-file-truename
+                LaTeX-reftex-cite-format-auto-activate
                 (fboundp 'reftex-set-cite-format))
        ;; Check if RefTeX supports jurabib.
        (if (assoc 'jurabib reftex-cite-format-builtin)
diff --git a/style/listings.el b/style/listings.el
index e03b8216..4738d687 100644
--- a/style/listings.el
+++ b/style/listings.el
@@ -349,7 +349,8 @@
                                       (LaTeX-extract-key-value-label))
                              1 LaTeX-auto-label))
       ;; Tell RefTeX
-      (when (fboundp 'reftex-add-label-environments)
+      (when (and buffer-file-truename
+                 (fboundp 'reftex-add-label-environments))
         (reftex-add-label-environments
          `((,env ?l "lst:" "~\\ref{%s}"
                  LaTeX-keyval-caption-reftex-context-function
@@ -431,7 +432,8 @@
    ;; RefTeX support lstlistings environment via
    ;; `reftex-label-alist-builtin'.  We add the same thing here only
    ;; with our function as 5th element:
-   (when (fboundp 'reftex-add-label-environments)
+   (when (and buffer-file-truename
+              (fboundp 'reftex-add-label-environments))
      (reftex-add-label-environments
       '(("lstlisting" ?l "lst:" "~\\ref{%s}"
          LaTeX-keyval-caption-reftex-context-function
diff --git a/style/makeidx.el b/style/makeidx.el
index 680a16b7..0f7bbb3e 100644
--- a/style/makeidx.el
+++ b/style/makeidx.el
@@ -45,7 +45,8 @@
           TeX-complete-list))
 
    ;; RefTeX support
-   (and (fboundp 'reftex-add-index-macros)
+   (and buffer-file-truename
+        (fboundp 'reftex-add-index-macros)
         (reftex-add-index-macros '(default)))
 
    ;; Fontification
diff --git a/style/mathtools.el b/style/mathtools.el
index 853093d3..55039731 100644
--- a/style/mathtools.el
+++ b/style/mathtools.el
@@ -145,7 +145,8 @@
                    `(,env . LaTeX-item-equation) t)
       (add-to-list 'LaTeX-label-alist
                    `(,env . LaTeX-amsmath-label) t)
-      (when (fboundp 'reftex-add-label-environments)
+      (when (and buffer-file-truename
+                 (fboundp 'reftex-add-label-environments))
         (reftex-add-label-environments `((,env ?e nil nil t)))))))
 
 (add-hook 'TeX-auto-prepare-hook #'LaTeX-mathtools-auto-prepare t)
@@ -473,7 +474,8 @@ Put line break macro on the last line.  Next, insert an ampersand."
                  LaTeX-label-alist))
 
    ;; RefTeX support: Add env's with `reftex-add-label-environments'
-   (when (fboundp 'reftex-add-label-environments)
+   (when (and buffer-file-truename
+              (fboundp 'reftex-add-label-environments))
      (let ((envs '(("lgathered"  ?e nil nil t)
                    ("rgathered"  ?e nil nil t)
                    ("multlined"  ?e nil nil t))))
diff --git a/style/minted.el b/style/minted.el
index 655e9a4f..94a2aa1a 100644
--- a/style/minted.el
+++ b/style/minted.el
@@ -440,7 +440,8 @@ a list of strings."
      (add-to-list (make-local-variable 'LaTeX-indent-environment-list)
                   '("listing" current-indentation) t)
      (add-to-list 'LaTeX-label-alist '("listing" . LaTeX-listing-label) t)
-     (when (fboundp 'reftex-add-label-environments)
+     (when (and buffer-file-truename
+                (fboundp 'reftex-add-label-environments))
        (reftex-add-label-environments
         '(("listing" ?l "lst:" "~\\ref{%s}" caption nil nil)))))
 
diff --git a/style/minted2.el b/style/minted2.el
index 687b195c..08ddcc09 100644
--- a/style/minted2.el
+++ b/style/minted2.el
@@ -421,7 +421,8 @@ a list of strings."
      (add-to-list (make-local-variable 'LaTeX-indent-environment-list)
                   '("listing" current-indentation) t)
      (add-to-list 'LaTeX-label-alist '("listing" . LaTeX-listing-label) t)
-     (when (fboundp 'reftex-add-label-environments)
+     (when (and buffer-file-truename
+                (fboundp 'reftex-add-label-environments))
        (reftex-add-label-environments
         '(("listing" ?l "lst:" "~\\ref{%s}" caption nil nil)))))
 
diff --git a/style/multind.el b/style/multind.el
index a4e921bd..0bad853b 100644
--- a/style/multind.el
+++ b/style/multind.el
@@ -59,7 +59,8 @@
           TeX-complete-list))
 
    ;; RefTeX support
-   (and (fboundp 'reftex-add-index-macros)
+   (and buffer-file-truename
+        (fboundp 'reftex-add-index-macros)
         (reftex-add-index-macros '(multind)))
 
    ;; Fontification
diff --git a/style/natbib.el b/style/natbib.el
index e04de458..f08565d0 100644
--- a/style/natbib.el
+++ b/style/natbib.el
@@ -168,7 +168,8 @@
                               'function))
 
    ;; Tell RefTeX
-   (when (and LaTeX-reftex-cite-format-auto-activate
+   (when (and buffer-file-truename
+              LaTeX-reftex-cite-format-auto-activate
               (fboundp 'reftex-set-cite-format))
      (reftex-set-cite-format 'natbib)))
  TeX-dialect)
diff --git a/style/newfloat.el b/style/newfloat.el
index e3824a82..2fff45b4 100644
--- a/style/newfloat.el
+++ b/style/newfloat.el
@@ -117,13 +117,15 @@ If `caption.el' is loaded, add the new floating environment to
       (cond ((string-equal type "figure")
              (LaTeX-add-environments `(,flt LaTeX-env-figure))
              (add-to-list 'LaTeX-label-alist `(,flt . LaTeX-figure-label) t)
-             (when (fboundp 'reftex-add-label-environments)
+             (when (and buffer-file-truename
+                      (fboundp 'reftex-add-label-environments))
                (reftex-add-label-environments
                 `((,flt ?f ,LaTeX-figure-label "~\\ref{%s}" caption nil nil)))))
             ((string-equal type "table")
              (LaTeX-add-environments `(,flt LaTeX-env-figure))
              (add-to-list 'LaTeX-label-alist `(,flt . LaTeX-table-label) t)
-             (when (fboundp 'reftex-add-label-environments)
+             (when (and buffer-file-truename
+                      (fboundp 'reftex-add-label-environments))
                (reftex-add-label-environments
                 `((,flt ?t ,LaTeX-table-label "~\\ref{%s}" caption nil nil)))))
             ((string-equal type "verbatim")
@@ -131,7 +133,8 @@ If `caption.el' is loaded, add the new floating environment to
              (add-to-list (make-local-variable 'LaTeX-indent-environment-list)
                           `(,flt current-indentation) t)
              (add-to-list 'LaTeX-label-alist `(,flt . LaTeX-listing-label) t)
-             (when (fboundp 'reftex-add-label-environments)
+             (when (and buffer-file-truename
+                      (fboundp 'reftex-add-label-environments))
                (reftex-add-label-environments
                 `((,flt ?l "lst:" "~\\ref{%s}" caption nil nil)))))
             (t
diff --git a/style/subcaption.el b/style/subcaption.el
index 4ae2975d..2c6e98c5 100644
--- a/style/subcaption.el
+++ b/style/subcaption.el
@@ -215,7 +215,8 @@ outer-pos adjusted."
    (add-to-list 'LaTeX-label-alist '("subtable" . LaTeX-table-label) t)
 
    ;; Introduce env's to RefTeX if loaded
-   (when (fboundp 'reftex-add-label-environments)
+   (when (and buffer-file-truename
+              (fboundp 'reftex-add-label-environments))
      (reftex-add-label-environments
       `(("subfigure" ?f ,LaTeX-figure-label "~\\ref{%s}" caption)
         ("subtable"  ?t ,LaTeX-table-label  "~\\ref{%s}" caption))))
diff --git a/style/varioref.el b/style/varioref.el
index e7f95f7f..4c9ffb26 100644
--- a/style/varioref.el
+++ b/style/varioref.el
@@ -88,7 +88,8 @@
                               'reference))
 
    ;; Activate RefTeX reference style.
-   (and LaTeX-reftex-ref-style-auto-activate
+   (and buffer-file-truename
+        LaTeX-reftex-ref-style-auto-activate
         (fboundp 'reftex-ref-style-activate)
         (reftex-ref-style-activate "Varioref")))
  TeX-dialect)

--=-=-=--

Message sent to bug-auctex@HIDDEN:

X-Loop: help-debbugs@HIDDEN
Subject: bug#76615: 14.0.9; error with amsmath style hooks
Resent-From: Ikumi Keita <ikumi@HIDDEN>
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Hi Paul,

>>>>> "Paul D. Nelson" <ultrono@HIDDEN> writes:
> Making RefTeX work well with non-file buffers always seemed to me like a
> major undertaking.  The commands

> ;; reftex-add-index-macros
> ;; reftex-add-section-levels
> ;; reftex-add-label-environments
> ;; reftex-scanning-info-available-p
> ;; reftex-access-parse-file
> ;; reftex-access-scan-info
> ;; reftex-ref-style-list
> ;; reftex-ref-style-toggle
> ;; reftex-set-cite-format

> each call reftex-tie-multifile-symbols, which in turn calls
> reftex-TeX-master-file, which fails (with a hard landing) in a non-file
> buffer for which TeX-master has not been set to a tex file.

Is `reftex-TeX-master-file' the only source of RefTeX non-file buffer
difficulties? If so, I expect there is a possibility that we can amend
it so that RefTeX would not stumble in non-file buffer. For example,
`TeX-master-file' returns "<none>.tex" if it can't find a sensible
master file. What if we implement similar fallback for
`reftex-TeX-master-file'?

Regards,
Ikumi Keita
#StandWithUkraine #StopWarInUkraine
#Gaza #StopMassiveKilling #CeasefireNOW

Last modified: Sat, 1 Mar 2025 18:15:04 UTC

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