Hi,

The documentation for `org-latex-caption-above’ seems to imply that it can be set to a non-nil value to always place captions at the start of environments, instead of the end. However, with a non-nil value which is not a sequence, exporting something like the following from org causes an error:

[latexpCfhTz_350451aa2511e1a6f5ea1cf164b4329f062726cb.png]

The issue is that in `org-latex-latex-environment’, in the expression (memq type (append (plist-get info :latex-caption-above) ’(math))))) the first argument to `append’ gets expanded to the value of `org-latex-caption-above’ (at least for this example), which may not be a sequence.

I think the attached patch fixes this, but I don’t write much lisp, so maybe there’s a better way to handle this.

Best, Mads

From f28da9e3c80f03d70a9a6eced5029e12fc75ab99 Mon Sep 17 00:00:00 2001 From: Mads Bach Villadsen <mbvilladsen@pm.me> Date: Mon, 15 Jan 2024 15:37:29 -0500 Subject: [PATCH] ox-latex.el: Fix the case of latex-caption-above t

lisp/ox-latex.el: (org-latex-latex-environment): Check whether the property

`:latex-caption-above’ is a sequence or not, and handle them separately.

Correctly handle the case where org-latex-caption-above is non-nil and not a list of symbols. The documentation of org-latex-caption-above implies that it can be set to a non-nil value to place captions at the beginning of all environments.

TINYCHANGE — lisp/ox-latex.el | 4 +- 1 file changed, 3 insertions(+), 1 deletion(-)

diff –git a/lisp/ox-latex.el b/lisp/ox-latex.el index b36c46f13..4f2a94a20 100644 — a/lisp/ox-latex.el + b/lisp/ox-latex.el @@ -2682,7 +2682,9 @@ CONTENTS is nil. INFO is a plist holding contextual information.“ (org-latex–label latex-environment info nil t) (org-latex–caption/label-string latex-environment info))) (caption-above-p

- (memq type (append (plist-get info :latex-caption-above) ’(math)))))
- (let ((latex-caption-above (plist-get info :latex-caption-above)))
- (if (sequencep latex-caption-above) (memq type (append latex-caption-above ’(math)))
- latex-caption-above)))) (if (not (or (org-element-property :name latex-environment) (org-element-property :caption latex-environment))) value

– 2.39.3 (Apple Git-145)