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Re: Is this a deadlock waiting to happen?

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From: Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Re: Is this a deadlock waiting to happen?
Date: Sun, 15 Nov 2015 17:36:35 +0000
In-reply-to: <151114144737.ZM1845@torch.brasslantern.com>
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On 14 Nov 2015 22:47, Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx> wrote:
>
> Ray wrote: 
>
>     body_list=( ${(@f)"$( highlight $filename )"} ) 2>&1 | read _err 
>
> I was surprised to find that both $body_list and $_err are set in the 
> current shell.

There is a very longstanding set of cases where the fork happens in execcmd()  rather than up in execpline(), at the point where it would fork before an exec. I presume this is one of those. Then prefork()  substitutions are done first. I don't have the code with me but I think it's fairly tortuous (surprise).

pws

References:
- Is this a deadlock waiting to happen?
  - From: Bart Schaefer

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