GNU bug report logs -
#24649
24.5; Why no standard error for "Trailing garbage following expression"?
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Reported by: Drew Adams <drew.adams <at> oracle.com>
Date: Sun, 9 Oct 2016 18:04:01 UTC
Severity: minor
Tags: fixed, patch
Found in version 24.5
Fixed in version 27.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
Shouldn't this error be a standard error? If not a new standard error,
shouldn't it at least use one of the existing standard errors, such as
`scan-error' or `invalid-read-syntax'?
Otherwise, how to easily handle this error (e.g., to tell the user to
correct the input being read and then read again)?
In GNU Emacs 24.5.1 (i686-pc-mingw32)
of 2015-04-11 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
`configure --prefix=/c/usr --host=i686-pc-mingw32'
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Message #8 received at 24649 <at> debbugs.gnu.org (full text, mbox):
Drew Adams <drew.adams <at> oracle.com> writes:
> Shouldn't this error be a standard error? If not a new standard error,
> shouldn't it at least use one of the existing standard errors, such as
> `scan-error' or `invalid-read-syntax'?
>
> Otherwise, how to easily handle this error (e.g., to tell the user to
> correct the input being read and then read again)?
Makes sense to me. I'm not sure what signal to use, though -- anybody
got an idea?
Tentative patch:
diff --git a/src/minibuf.c b/src/minibuf.c
index 14a0dbe762..f6cf47f1f2 100644
--- a/src/minibuf.c
+++ b/src/minibuf.c
@@ -169,7 +169,8 @@ string_to_object (Lisp_Object val, Lisp_Object defalt)
{
int c = SREF (val, i);
if (c != ' ' && c != '\t' && c != '\n')
- error ("Trailing garbage following expression");
+ xsignal1 (Qinvalid_read_syntax,
+ build_string ("Trailing garbage following expression"));
}
}
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Added tag(s) patch.
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Lars Ingebrigtsen <larsi <at> gnus.org>
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(Sat, 27 Jul 2019 14:13:01 GMT)
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Message #13 received at 24649 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Drew Adams <drew.adams <at> oracle.com> writes:
>
>> Shouldn't this error be a standard error? If not a new standard error,
>> shouldn't it at least use one of the existing standard errors, such as
>> `scan-error' or `invalid-read-syntax'?
>>
>> Otherwise, how to easily handle this error (e.g., to tell the user to
>> correct the input being read and then read again)?
>
> Makes sense to me. I'm not sure what signal to use, though -- anybody
> got an idea?
[...]
> + xsignal1 (Qinvalid_read_syntax,
> + build_string ("Trailing garbage following expression"));
There weren't any comments, so I've now applied this. If somebody has a
better idea for the error signal, please amend.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Added tag(s) fixed.
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org
.
(Fri, 23 Aug 2019 00:26:02 GMT)
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bug marked as fixed in version 27.1, send any further explanations to
24649 <at> debbugs.gnu.org and Drew Adams <drew.adams <at> oracle.com>
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org
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(Fri, 23 Aug 2019 00:26:02 GMT)
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(Fri, 23 Aug 2019 08:07:01 GMT)
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Message #20 received at 24649 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Date: Fri, 23 Aug 2019 02:25:37 +0200
> Cc: 24649 <at> debbugs.gnu.org
>
> >> Shouldn't this error be a standard error? If not a new standard error,
> >> shouldn't it at least use one of the existing standard errors, such as
> >> `scan-error' or `invalid-read-syntax'?
> >>
> >> Otherwise, how to easily handle this error (e.g., to tell the user to
> >> correct the input being read and then read again)?
> >
> > Makes sense to me. I'm not sure what signal to use, though -- anybody
> > got an idea?
>
> [...]
>
> > + xsignal1 (Qinvalid_read_syntax,
> > + build_string ("Trailing garbage following expression"));
>
> There weren't any comments, so I've now applied this. If somebody has a
> better idea for the error signal, please amend.
Thanks, but this change needs to be reflected in the ELisp manual,
where currently invalid-read-syntax is documented for a different use
case.
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(Fri, 23 Aug 2019 08:17:02 GMT)
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Message #23 received at 24649 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
>> > + xsignal1 (Qinvalid_read_syntax,
>> > + build_string ("Trailing garbage following expression"));
>>
>> There weren't any comments, so I've now applied this. If somebody has a
>> better idea for the error signal, please amend.
>
> Thanks, but this change needs to be reflected in the ELisp manual,
> where currently invalid-read-syntax is documented for a different use
> case.
Let's see... Qargs_out_of_range would be inappropriate... And
Qwrong_type_argument... Perhaps the closest one of the predefined
errors would be Qend_of_file?
Or we could have a new one. `garbage-follows-expression'? That's
pretty explicit.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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(Fri, 23 Aug 2019 09:20:02 GMT)
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Message #26 received at 24649 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: drew.adams <at> oracle.com, 24649 <at> debbugs.gnu.org
> Date: Fri, 23 Aug 2019 10:16:04 +0200
>
> >> > + xsignal1 (Qinvalid_read_syntax,
> >> > + build_string ("Trailing garbage following expression"));
> >>
> >> There weren't any comments, so I've now applied this. If somebody has a
> >> better idea for the error signal, please amend.
> >
> > Thanks, but this change needs to be reflected in the ELisp manual,
> > where currently invalid-read-syntax is documented for a different use
> > case.
>
> Let's see... Qargs_out_of_range would be inappropriate... And
> Qwrong_type_argument... Perhaps the closest one of the predefined
> errors would be Qend_of_file?
>
> Or we could have a new one. `garbage-follows-expression'? That's
> pretty explicit.
We don't have to invent a new symbol, we just need to document in
"Standard errors" that this error is also signaled an the situation
described in this bug report.
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(Fri, 23 Aug 2019 18:44:01 GMT)
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Message #29 received at 24649 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> We don't have to invent a new symbol, we just need to document in
> "Standard errors" that this error is also signaled an the situation
> described in this bug report.
I see. I've now done so on the trunk.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug archived.
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This bug report was last modified 4 years and 211 days ago.
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