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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: (error "Stack overflow in regexp matcher") and (?)wrong display
 of regexp in backtrace
Date: Sun, 15 Mar 2020 19:46:51 +0200
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References: <20200315103922.GA4928@ACM>
 <jwveettmvyk.fsf-monnier+emacs@gnu.org> <20200315173237.GE4928@ACM>
 <66BE4BC2-D31C-439B-8D74-4FAA05028C04@acm.org>
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Cc: acm@muc.de, monnier@iro.umontreal.ca, emacs-devel@gnu.org
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@acm.org>
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> From: Mattias Engdegård <mattiase@acm.org>
> Date: Sun, 15 Mar 2020 18:38:28 +0100
> Cc: Stefan Monnier <monnier@iro.umontreal.ca>, emacs-devel@gnu.org
> 
> (let ((print-escape-control-characters t))
>   (print "\r1,\r8"))
> =>
> "\0151,\158"

That's terrible, IMO.