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bug#15907: 24.3; Emacs crash due to substitute-command-keys and after-ch
From: |
Eli Zaretskii |
Subject: |
bug#15907: 24.3; Emacs crash due to substitute-command-keys and after-change-functions |
Date: |
Sat, 16 Nov 2013 11:31:16 +0200 |
> Date: Fri, 15 Nov 2013 21:23:01 +0000 (GMT)
> From: Artur Malabarba <bruce.connor.am@gmail.com>
>
> Emacs crashes whenever `substitute-command-keys' is invoked and one of
> the functions in `after-change-functions' contains a call similar to
> `(format "%s" 1)'.
>
> To reproduce:
>
> 1. Start `emacs -Q';
> 2. Evaluate the following two statements:
> (add-hook 'after-change-functions (lambda (&rest a) (format "%s" 1)))
> (substitute-command-keys "\\{emacs-lisp-mode-map}")
> 3. That's it. Emacs crashes.
>
> The crash doesn't happen if you replace the number 1 with a string or
> a symbol, but it does also happen if you replace it with a list.
It no longer crashes after changes in trunk revision 115119.
> This is most annoying as it causes a crash whenever `describe-mode' is
> invoked.
Since you didn't show any real-life use cases, I'm not sure that the
result is what you wanted, please do check.