From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=0.2 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED
	autolearn=no autolearn_force=no version=3.4.4
Received: (qmail 8650 invoked from network); 26 Aug 2023 00:11:29 -0000
Received: from 9front.inri.net (168.235.81.73)
  by inbox.vuxu.org with ESMTPUTF8; 26 Aug 2023 00:11:29 -0000
Received: from sendmail.purelymail.com ([34.202.193.197]) by 9front; Fri Aug 25 20:05:17 -0400 2023
DKIM-Signature: a=rsa-sha256; b=kWHk9RMptfSyPrKepZQVfPScCmPm2qI/e2jFWtp11VsAb91Pt9GhvlX91hZ0ZmEb+kEH11gRoAYJ/HEDQcA/65kNicmD7u2N/F7ScXmmGBlBo2zPigq3QZIsW8vC3zOFn3XrWyl/idOffAFzxHTxeq95a1E1uNg6zqFgeuxdPWheFYI8fMqDQg4bjwClRKMQmkJDnB9lPdx7MzcVv692VAUfxw9NI20ao9XnVKV9I+9OnpdLc+fSCYVnWhGZ8XABbt8WRlruiwv8t2qB3fGHTk/4tx930/iGTftgAo9WFw27DBlc86aaS0O9L/EzEA+OkqmFPFdSHzOJ6QNrCmL5Sg==; s=purelymail1; d=pbrane.org; v=1; bh=GDgsg9RTcp0Ty/rAtcxbDnoAxkszqYvargtRx93Q9hM=; h=Received:From:To:Subject;
DKIM-Signature: a=rsa-sha256; b=GzcOvDeUkPiQgWc2qgf+4zrZsVoqO96isY/a4CoDwPX16vy7R6+K5WlSAgfzJTAirAJSKtDXpVvqH3HceLyftkZ3X4aD84lSnCaeODPYE6NiEwWOXbmNAsmlVHgrdsHRWwQadwbc16Ii1xJAKp4/q5DpbPMjudrHrOE0VOIVwwRU/XgRg6Z979U7/2OdIjybAHBmZpJ+bHDuBnvL/6NVv8Ot+W5Po6+LEYldddoPdUgE/P+GkNsqVFk11Y8GBxCyO0AwipA0ijPjamK+aMu/oM1jGS+t/8mw95Scw9kn/7XzxEKzRXc2luYPTi31aaQKY8y9ywfu3uknVqPqG1a2yw==; s=purelymail1; d=purelymail.com; v=1; bh=GDgsg9RTcp0Ty/rAtcxbDnoAxkszqYvargtRx93Q9hM=; h=Feedback-ID:Received:From:To:Subject;
Feedback-ID: 10987:2443:null:purelymail
X-Pm-Original-To: 9front@9front.org
Received: by smtp.purelymail.com (Purelymail SMTP) with ESMTPSA id 1717933579
          for <9front@9front.org>
          (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384);
          Sat, 26 Aug 2023 00:05:05 +0000 (UTC)
Date: Fri, 25 Aug 2023 17:04:46 -0700
From: Anthony Martin <ality@pbrane.org>
To: 9front@9front.org
Message-ID: <ZOlBnqcGtlMRHsRD@alice>
References: <26E0B9AD31488853D40C701E19370A2D@eigenstate.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <26E0B9AD31488853D40C701E19370A2D@eigenstate.org>
List-ID: <9front.9front.org>
List-Help: <http://lists.9front.org>
X-Glyph: ➈
X-Bullshit: self-healing cache dependency module scripting base 
Subject: [9front] Re: sed: fix moving '^' match
Reply-To: 9front@9front.org
Precedence: bulk

ori@eigenstate.org once said:
> Currently, if you do something like:
>
> 	echo aabbccd | sed s/^..//g
>
> it will output simply:
>
> 	'd'
>
> [...]
>
> This patch works by adding a dummy character
> at the start of the line, so we aren't at
> the start of a line after the first sub.
>
> [...]
>
> anyone aware of any unexpected side effets
> that this may have?

It looks like a reasonable change but I'd be hesitant to
make it. Ed(1) produces the same output and the behavior
appears to be unchanged since at least the 8th edition.

It's clearly a rare edge case and easily avoided by not using
the g flag when it's not necessary. I doubt it would break
anything, though.

Cheers,
  Anthony