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Re: zsh malloc/heap corruption

X-seq: zsh-workers 53973
From: "Anthony Heading" <ajrh@xxxxxxxx>
To: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxx>
Cc: zsh-workers@xxxxxxx
Subject: Re: zsh malloc/heap corruption
Date: Sat, 27 Sep 2025 05:54:43 -0400
Archived-at: <https://zsh.org/workers/53973>
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In-reply-to: <CAH+w=7Z9+tSW=ccqDk-5+v4zdcY+D_SS_QZyNss8gqNyqJgPXA@mail.gmail.com>
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References: <9da6855d-0253-4fb1-b967-6f47aabc1728@app.fastmail.com> <CAH+w=7Z9+tSW=ccqDk-5+v4zdcY+D_SS_QZyNss8gqNyqJgPXA@mail.gmail.com>

Thanks for looking at it so quickly.   OS and version as mentioned in orig message:

> Running on Linux 6.12.38+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.38-1 (2025-07-16) x86_64 GNU/Linux,  using both Debian's installed zsh:amd64 5.9-8+b14, but also current git master in both release and debug build.    (git 3cd363c8804)

> On the other hand, it doesn't DO anything either, except hang with 5
> zsh processes and one grep still running.  

Hmm.  I was running this on an old 32-core server,  I realize I see the same obvious hang if I run it on my laptop instead or simply restrict the number of cores with 'taskset'. 

So that 'wait' isn't helpful, is it?  Suggest to just remove it,  and then run with more iterations.  Hopefully there's no more way to hang, and even on my old 4 core thinkpad i now see the same errors with e.g. 'crash.zsh 10000'

Follow-Ups:
- Re: zsh malloc/heap corruption
  - From: Bart Schaefer

References:
- zsh malloc/heap corruption
  - From: Anthony Heading
- Re: zsh malloc/heap corruption
  - From: Bart Schaefer

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