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Date:   Sat, 02 Jul 2022 01:36:44 +0200
Author: Steffen Nurpmeso <steffen@sdaoden.eu>
From:   Steffen Nurpmeso <steffen@sdaoden.eu>
To:     DASH shell mailing list <dash@vger.kernel.org>,
        Robert Elz <kre@munnari.OZ.AU>
Subject: Re: $(()) pre/postfix bug
Message-ID: <20220701233644.ZGiHI%steffen@sdaoden.eu>
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Steffen Nurpmeso wrote in
 <20220701231439.egWzS%steffen@sdaoden.eu>:
 ..
 |While doing so i encountered diverging behaviour in between
 |shells, and a bug in dash (and a memory failure in NetBSD 9 ksh).

Nonsense.  dash simply does not support pre/postfix operators.
Sorry for the noise.

  ...
 |NetBSD n-0900 9.0 NetBSD 9.0 (GENERIC) #0: Fri Feb 14 00:06:28 UTC \
 |2020  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC \
 |amd64
 |
 |#?0|n-0900:steffen$ ksh -c '(i=10; echo $((++-+++i)))'
 |Memory fault
 ...

Ok, maybe a bug report over there.

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)