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bug#31557: 27.0.50; SES hangs on save when 'delete-trailing-whitespace'
From: |
Eli Zaretskii |
Subject: |
bug#31557: 27.0.50; SES hangs on save when 'delete-trailing-whitespace' is in 'before-save-hook' |
Date: |
Sun, 03 Jun 2018 18:44:01 +0300 |
> From: Filipp Gunbin <fgunbin@fastmail.fm>
> Date: Tue, 22 May 2018 20:53:55 +0300
>
>
> emacs -Q
> M-: (add-hook 'before-save-hook #'delete-trailing-whitespace)
> C-x C-f ~/tmp/1.ses (file does not exist)
> C-x C-s
>
> At this point emacs hangs, echo area shows "Saving file .../1.ses".
>
> With `toggle-error-on-quit', I see the following backtrace:
>
> re-search-forward("\\s-$" nil t)
> delete-trailing-whitespace()
> run-hooks(before-save-hook)
> basic-save-buffer(t)
> save-buffer(1)
> funcall-interactively(save-buffer 1)
> call-interactively(save-buffer nil nil)
> command-execute(save-buffer)
If my reading of the code is correct, it should infloop for every use
case where region-modifiable-p returns nil.
Does the patch below look right?
--- lisp/simple.el~0 2018-03-14 06:40:04.000000000 +0200
+++ lisp/simple.el 2018-06-03 17:51:37.213490900 +0300
@@ -667,8 +667,9 @@
(while (re-search-forward "\\s-$" end-marker t)
(skip-syntax-backward "-" (line-beginning-position))
(let ((b (point)) (e (match-end 0)))
- (when (region-modifiable-p b e)
- (delete-region b e)))))
+ (if (region-modifiable-p b e)
+ (delete-region b e)
+ (goto-char e)))))
(if end
(set-marker end-marker nil)
;; Delete trailing empty lines.
- bug#31557: 27.0.50; SES hangs on save when 'delete-trailing-whitespace' is in 'before-save-hook',
Eli Zaretskii <=