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Re: Crash when undoing pasted text when bracketed-paste-magic is enabled

X-seq: zsh-workers 54984
From: Vincent Lefevre <vincent@xxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Re: Crash when undoing pasted text when bracketed-paste-magic is enabled
Date: Fri, 17 Jul 2026 12:58:09 +0200
Archived-at: <https://zsh.org/workers/54984>
In-reply-to: <A11C23A9-B867-440A-9360-1F9FEE3CDB41@redhat.com>
List-id: <zsh-workers.zsh.org>
Mail-followup-to: zsh-workers@xxxxxxx
References: <A11C23A9-B867-440A-9360-1F9FEE3CDB41@redhat.com>

On 2026-07-17 11:26:37 +0200, Lukáš Zaoral wrote:
> $ cat .zshrc
> bindkey "^_" undo
> autoload -Uz bracketed-paste-magic
> zle -N bracketed-paste bracketed-paste-magic
> $ ZDOTDIR=$PWD zsh
> % 
> // First input some random text, then paste another piece of text using ctrl+shift+v,
> // then undo that with ctrl+_ couple of times.
> zsh: segmentation fault (core dumped)

zsh 5.9 (Debian/unstable zsh package) is also affected.

The first ^_ undoes the paste, a second ^_ undoes the text insertion
done just before and places the cursor at an incorrect position, and
a third ^_ makes zsh segfault.

-- 
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)

References:
- Crash when undoing pasted text when bracketed-paste-magic is enabled
  - From: Lukáš Zaoral

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