Subject: bug#37653: 26.3; edbug backquoted dot is space sensitive

From: Lars Ingebrigtsen <[email-masked]>
Date: Sat, 21 May 2022 14:13:49 +0200

Andreas Schwab <[email-masked]> writes:

> Apparently the handling of ".," in the reader changed with the
> introduction of new-style backquotes.

So the code here is:

(defun edebug-next-token-class ()
[...]
  (if (and (eq (following-char) ?.)
	   (save-excursion
	     (forward-char 1)
	     (or (and (eq (aref edebug-read-syntax-table (following-char))
			  'symbol)
		      (not (= (following-char) ?\;)))
		 (memq (following-char) '(?\, ?\.)))))

So it's explicitly allowing , after . here -- but surely that's wrong?
Or are there any circumstances that reading .,<foo> leads should lead to
a valid symbol?  Juri, do you remember this?  It's from 2004.  😀

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