GNU bug report logs - #21624
Syntax weirdness lately

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Daniel Colascione <dancol <at> dancol.org>
To: bug-emacs <bug-gnu-emacs <at> gnu.org>
Subject: Syntax weirdness lately
Date: Mon, 5 Oct 2015 12:47:01 -0700

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In latest master, syntax-propertize application seems to be buggy in a
way I can't readily reproduce or analyze.

Consider this bit of shell:

                elif [[ $c = '\' ]]; then
                    state=word-backslash

Sometimes, unreproducibly of course, we don't close the string at the
trailing
single quotation mark, and the rest of the buffer ends up being a
string, at least up until the single quotation mark. A similar problem
in Python sometimes leads to Python inflooping in buffers containing
strings triple-quoted with single quotation marks: it appears that we
interpret "'''" as just an empty single-quoted string, followed by a
single-quoted opener.

Did we change something about how complex syntax rules work lately?
Revision history doesn't point to anything.

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Message #8 received at 21624 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Daniel Colascione <dancol <at> dancol.org>, 21624 <at> debbugs.gnu.org
Subject: Re: bug#21624: Syntax weirdness lately
Date: Mon, 5 Oct 2015 23:50:26 +0300

On 10/05/2015 10:47 PM, Daniel Colascione wrote:

> Did we change something about how complex syntax rules work lately?
> Revision history doesn't point to anything.

There have been some changes in syntax.c not too long ago, e.g. in 
3928ef2dd5b8febf3b1d9c1bfb22af3698d16bea.

Message #11 received at 21624 <at> debbugs.gnu.org (full text, mbox):

From: Daniel Colascione <dancol <at> dancol.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>, 21624 <at> debbugs.gnu.org
Subject: Re: bug#21624: Syntax weirdness lately
Date: Mon, 5 Oct 2015 13:52:42 -0700

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On 10/05/2015 01:50 PM, Dmitry Gutov wrote:
> On 10/05/2015 10:47 PM, Daniel Colascione wrote:
> 
>> Did we change something about how complex syntax rules work lately?
>> Revision history doesn't point to anything.
> 
> There have been some changes in syntax.c not too long ago, e.g. in
> 3928ef2dd5b8febf3b1d9c1bfb22af3698d16bea.

Thanks. I'll have to read the code. Since Stefan's changes touched the
syntax-propertize stuff and the problems I'm seeing involve that code
path, the on-demand stuff is a prime suspect. But I have no repro, and
I'm not particularly familiar with how the syntax machinery works.

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Message #18 received at 21624-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 21624-done <at> debbugs.gnu.org
Subject: Re: bug#21624: Syntax weirdness lately
Date: Thu, 08 Dec 2016 17:03:31 -0500

I don't see how anything can be done with this report as it stands, so
given that it's been a year I'm closing it. Feel free to reopen, or make
a new report, if there is something more substantive to say.

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