Re: backward-sexp throws scan-error "Unbalanced parentheses", but forward-sexp works

[Stefan Monnier via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>]

> The maintainer is not really responsive. I skimmed the code and
> it seems it only calls (indent-according-to-mode) and stuff,
> and does not do anything crazy:

I haven't looked in detail, but I did notice that it let-binds
`after-change-functions` which can interfere with other code adding
functions to this hook.

Does the quick&dirty patch below help?


        Stefan


diff --git a/aggressive-indent.el b/aggressive-indent.el
index 0234fcf29c..a08a4c241b 100644
--- a/aggressive-indent.el
+++ b/aggressive-indent.el
@@ -393,7 +393,7 @@ or messages."
   "Indent the regions in `aggressive-indent--changed-list'."
   (unless (or (run-hook-wrapped 'aggressive-indent--internal-dont-indent-if #'eval)
               (aggressive-indent--run-user-hooks))
-    (let ((after-change-functions (remove 'aggressive-indent--keep-track-of-changes after-change-functions))
+    (let ((aggressive-indent-mode nil)
           (inhibit-point-motion-hooks t)
           (indent-function
            (if (cl-member-if #'derived-mode-p aggressive-indent-modes-to-prefer-defun)