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Date: Tue, 26 May 2020 18:48:30 +0000
From: Daniel Shahaf <d.s@daniel.shahaf.name>
To: Marlon Richert <marlon.richert@gmail.com>
Cc: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: Zsh crashes on `compadd` when using `_history` completer &
 zstyle `ignored-patterns` is set
Message-ID: <20200526184830.4b52dd0c@tarpaulin.shahaf.local2>
In-Reply-To: <CAHLkEDtGT89iRnbe+VDbBdMU1LqDY0Z=BCbH9Qqhgv2+XrKJJw@mail.gmail.com>
References: <CAHLkEDtGT89iRnbe+VDbBdMU1LqDY0Z=BCbH9Qqhgv2+XrKJJw@mail.gmail.com>
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Marlon Richert wrote on Mon, 25 May 2020 14:02 +0300:
> *Given*
> 
>    - A .zshrc file containing the following lines:
> 
> HISTFILE=${ZDOTDIR:-$HOME}/.zsh_history
> HISTSIZE=2000
> SAVEHIST=1000
> autoload -Uz compinit
> compinit
> zstyle ':completion:*' ignored-patterns ''
> 
> 
>    - A `${ZDOTDIR:-$HOME}/.zsh_history` file that contains >1000 lines of
>    history.
> 
> *When*
> 
>    1. I start a new shell with `zsh -dxv &>! ~/zsh-debug.log`
>    2. I press `^[/` to activate `_history-complete-older` (or anything else
>    that uses the `_history` completer).
> 
> *Then*
> 
>    - Zsh crashes with the message `zsh: segmentation fault`.
>    - `~/zsh-debug.log` ends in the following lines:
> 

I followed these steps as follows:

[[[
$ cd "$(mktemp -d)"
$ tee .zshrc
HISTFILE=${ZDOTDIR:-$HOME}/.zsh_history
HISTSIZE=2000
SAVEHIST=1000
autoload -Uz compinit
compinit
zstyle ':completion:*' ignored-patterns ''
<pressed Ctrl+D>
$ yes | head -1001 > .zsh_history 
$ ZDOTDIR=$PWD $builddir/Src/zsh -d
% bindkey -e
% <pressed M-/>
]]]

The terminal beeped and no crash happened.

What's your $ZSH_VERSION and $ZSH_PATCHLEVEL?