GNU logs - #28295, boring messages

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Subject: bug#28295: better error messages: missing closing parenthesis
Resent-From: Ricardo Wurmus <rekado@HIDDEN>
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From: Ricardo Wurmus <rekado@HIDDEN>
Date: Wed, 30 Aug 2017 16:10:35 +0200
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A person who does not use paredit can easily create a source file that
does not have matching parentheses.  Loading a broken file currently
produces an error like this:

--8<---------------cut here---------------start------------->8---
$ guile -e '(hello'
ERROR: In procedure read:
ERROR: In procedure scm_i_lreadparen: #<unknown port>:1:7: end of file
--8<---------------cut here---------------end--------------->8---

For new users it is not obvious that this error message means that a
closing parenthesis is missing.

Can the message be improved?

--
Ricardo

GPG: BCA6 89B6 3655 3801 C3C6  2150 197A 5888 235F ACAC
https://elephly.net

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: bug#28295: Acknowledgement (better error messages: missing
 closing parenthesis)
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Subject: bug#28295: better error messages: missing closing parenthesis
Resent-From: ludo@HIDDEN (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
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From: ludo@HIDDEN (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
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Date: Tue, 10 Oct 2017 23:18:34 +0200
In-Reply-To: <87o9qxf8o4.fsf@HIDDEN> (Ricardo Wurmus's message of "Wed,
 30 Aug 2017 16:10:35 +0200")
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Ricardo Wurmus <rekado@HIDDEN> skribis:

> A person who does not use paredit can easily create a source file that
> does not have matching parentheses.  Loading a broken file currently
> produces an error like this:
>
> $ guile -e '(hello'
> ERROR: In procedure read:
> ERROR: In procedure scm_i_lreadparen: #<unknown port>:1:7: end of file
>
> For new users it is not obvious that this error message means that a
> closing parenthesis is missing.
>
> Can the message be improved?

In Guix I worked around this with:

  https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3Da6e22d84450450cac=
c6fc36445f6ae378a5b7ad0

A bit of a hack, but it looks better:

  configuration.scm:135:1: missing closing parenthesis

In Guile proper, we could replace =E2=80=9Cend of file=E2=80=9D with =E2=80=
=9Cmissing closing
parenthesis=E2=80=9D, which would already be an improvement, though we=E2=
=80=99d still
see that =E2=80=9Cscm_i_lreadparen=E2=80=9D and maybe =E2=80=9Cice-9=E2=80=
=9D here and there.

Ludo=E2=80=99.

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