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RE: `looking-back' strange warning

From: Drew Adams
Subject: RE: `looking-back' strange warning
Date: Thu, 1 Oct 2015 09:00:43 -0700 (PDT) 
> It's a feature: calling `looking-back' without LIMIT is slow, don't do
> that. The compiler is telling you that.

No, it is "warning" you that there are 2-3 "required" arguments, which is 
patently false.  This is a product bug, IMO.  Wrong message.

Letting you know how to improve performance or avoid slow performance is 
helpful information, but it is not a "warning" - there is no danger here.  And 
there is only one required argument.
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