On Thu, Feb 27, 2020 at 9:00 AM Kaushal Modi <kaushal.modi@gmail.com> wrote:

> Failure 2: Change in parsing of org babel header arguments.
>
> The relevant snippet where I parse the header arguments in ox-hugo.el is
> at
> https://github.com/kaushalmodi/ox-hugo/blob/f8ec4aa5ad7d92f94bd8dbb814d85f980be67aea/ox-hugo.el#L2563
>
> This behavior change in org-babel-parse-header-arguments is also not
> documented in ORG-NEWS. I will now investigate what cause this regression.
>

The regression is caused by
https://code.orgmode.org/bzg/org-mode/commit/6b2a7cb20b357e730de151522fe4204c96615f98
or the later commit that changes `org-babel--string-to-number'.

Using this function redefinition with additional debug messages:

(defun org-babel--string-to-number (string)
  "If STRING represents a number return its value.
Otherwise return nil."
  (message "DBG: string: %S" string)
  (unless (string-match-p "\\s-" (org-trim string))
    (let ((interned-string (ignore-errors (read string))))
      (when (numberp interned-string)
        (message "DBG: interned string: %S" interned-string)
interned-string))))

I get:

DBG: string: "1,3-5"
DBG: interned string: 1

So that ",3-5" piece of information is lost.