GNU bug report logs - #34085
autoscan reports a warning

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Package: guix; Reported by: Joshua Branson <jbranso@HIDDEN>; dated Tue, 15 Jan 2019 15:45:02 UTC; Maintainer for guix is bug-guix@HIDDEN.

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From: Joshua Branson <jbranso@HIDDEN>
To: bug-guix@HIDDEN
Subject: Re: bug#34085: autoscan reports a warning
References: <87r2devscq.fsf@HIDDEN>
 <20190116172916.20b20636@HIDDEN>
Mail-Followup-To: bug-guix@HIDDEN
Date: Thu, 17 Jan 2019 10:04:38 -0500
In-Reply-To: <20190116172916.20b20636@HIDDEN> (Danny Milosavljevic's
 message of "Wed, 16 Jan 2019 17:29:16 +0100")
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Danny Milosavljevic <dannym@HIDDEN> writes:

> Hi,
>
> On Tue, 15 Jan 2019 10:43:49 -0500
> Joshua Branson <jbranso@HIDDEN> wrote:
>
>> I'm not certain if this is the right list to report this to, but I just
>> installed autoscan version 2.21, and it gave me this warning:
>> 
>> #BEGIN_SRC sh
>>   autoscan
>> #END_SRC
>> 
>> Unescaped left brace in regex is deprecated here (and will be fatal
>> in Perl 5.30), passed through in regex; marked by <-- HERE in m/\${
>> <-- HERE [^\}]*}/ at /home/joshua/.guix-profile/bin/autoscan line
>> 361.
>> 
>> 
>> Should I report this upstream instead?
>
> I think so, yes.
>
> autoscan is part of autoconf 2.21, so the bug report should go to the autoconf package.
>
> The regexp in question is
>
>       s/\${[^\}]*}//g;
>
> Perl is complaining because perl regexp use curly braces to specify a range of valid repeats.
> Maybe the easiest way to understand it is that the following equivalences hold in regexps:
>
> ? is equivalent to {0,1}
> + is equivalent to {1,}
> * is equivalent to {0,}
>
> The above (at the end of the regexp "\${[^\}]*}") probably means a literal curly
> brace--but they don't escape it - hence the warning.
>
> It's only a warning because no valid repeat range can start with a closing curly
> brace.
> So perl can still figure out what you meant.
>
> But it's obviously not recommended to use unescaped closing curly braces to
> match a literal closing curly brace regardless.
>


Ok, I'll report this upstream.  Thanks for flushing out the main issue!

-- 
Joshua Branson
Sent from Emacs and Gnus




Information forwarded to bug-guix@HIDDEN:
bug#34085; Package guix. Full text available.

Message received at 34085 <at> debbugs.gnu.org:


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Date: Wed, 16 Jan 2019 17:29:16 +0100
From: Danny Milosavljevic <dannym@HIDDEN>
To: Joshua Branson <jbranso@HIDDEN>
Subject: Re: bug#34085: autoscan reports a warning
Message-ID: <20190116172916.20b20636@HIDDEN>
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Hi,

On Tue, 15 Jan 2019 10:43:49 -0500
Joshua Branson <jbranso@HIDDEN> wrote:

> I'm not certain if this is the right list to report this to, but I just
> installed autoscan version 2.21, and it gave me this warning:
>=20
> #BEGIN_SRC sh
>   autoscan
> #END_SRC
>=20
> Unescaped left brace in regex is deprecated here (and will be fatal in Pe=
rl 5.30), passed through in regex; marked by <-- HERE in m/\${ <-- HERE [^\=
}]*}/ at /home/joshua/.guix-profile/bin/autoscan line 361.
>=20
>=20
> Should I report this upstream instead?

I think so, yes.

autoscan is part of autoconf 2.21, so the bug report should go to the autoc=
onf package.

The regexp in question is

      s/\${[^\}]*}//g;

Perl is complaining because perl regexp use curly braces to specify a range=
 of valid repeats.
Maybe the easiest way to understand it is that the following equivalences h=
old in regexps:

? is equivalent to {0,1}
+ is equivalent to {1,}
* is equivalent to {0,}

The above (at the end of the regexp "\${[^\}]*}") probably means a literal =
curly
brace--but they don't escape it - hence the warning.

It's only a warning because no valid repeat range can start with a closing =
curly
brace.
So perl can still figure out what you meant.

But it's obviously not recommended to use unescaped closing curly braces to
match a literal closing curly brace regardless.

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Information forwarded to bug-guix@HIDDEN:
bug#34085; Package guix. Full text available.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: 34085 <at> debbugs.gnu.org
Subject: Re: bug#34085: autoscan reports a warning
References: <87r2devscq.fsf@HIDDEN>
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 Jan 2019 10:43:49 -0500")
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Hi,

Joshua Branson <jbranso@HIDDEN> skribis:

> I'm not certain if this is the right list to report this to, but I just
> installed autoscan version 2.21, and it gave me this warning:

Guix doesn=E2=80=99t have an =E2=80=98autoscan=E2=80=99 package, does it?

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#34085; Package guix. Full text available.

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From: Joshua Branson <jbranso@HIDDEN>
To: bug-guix@HIDDEN
Subject: autoscan reports a warning
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Hello,

I'm not certain if this is the right list to report this to, but I just
installed autoscan version 2.21, and it gave me this warning:

#BEGIN_SRC sh
  autoscan
#END_SRC

Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.30), passed through in regex; marked by <-- HERE in m/\${ <-- HERE [^\}]*}/ at /home/joshua/.guix-profile/bin/autoscan line 361.


Should I report this upstream instead?

Thanks

--
Joshua Branson
Sent from Emacs and Gnus




Acknowledgement sent to Joshua Branson <jbranso@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guix@HIDDEN. Full text available.
Report forwarded to bug-guix@HIDDEN:
bug#34085; Package guix. Full text available.
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