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bug#66406: Broken `re-search-forward' (?)
From: |
Stefan Monnier |
Subject: |
bug#66406: Broken `re-search-forward' (?) |
Date: |
Tue, 10 Oct 2023 09:37:20 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Basil L. Contovounesios [2023-10-08 21:39:44] wrote:
> Paul Pogonyshev [2023-10-08 12:35 +0200] wrote:
>
>> In a recent Emacs master (as provided in Silex's Docker image):
>
> Any chance of knowing which commit precisely?
>
>> $ emacs --batch --eval "(with-temp-buffer (insert
>> \"\n;;;###autoload\n(defun ...)\n\") (goto-char 1) (print
>> (re-search-forward \"^[[:space:]]*;;;###autoload[[:space:]]*$\" nil t)))"
>>
>> Prints nil.
>>
>> With every stable version of Emacs I have this prints 16.
>
> I get 16 with today's master as well
> (M-x report-emacs-bug info follows below).
According, to my test, this was fixed by
commit 37130fd500fbf78ff0d0037aa6275f0f70a415dd
Author: Stefan Monnier <monnier@iro.umontreal.ca>
Date: Tue Oct 3 10:10:57 2023 -0400
regex.c: Fix recent regression with mutually_exclusive_p
The new analysis code ended up increasing the scope of an optimization
a bit too far. Reign it in.
* src/regex-emacs.c (struct mutexcl_data): Add `unconstrained` field.
(mutually_exclusive_one): Use and set it.
(mutually_exclusive_p): Initialize it.
* test/src/regex-emacs-tests.el (regexp-tests-backtrack-optimization):
Add test.
-- Stefan