GNU bug report logs - #24022
24.5; C indentation failure

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

From: robgssp <at> gmail.com
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; C indentation failure
Date: Sun, 17 Jul 2016 12:19:34 -0700

c-mode fails to indent correctly when a #if is followed by a
comment. Example:

int main() {
#if defined(a) // comment
  if (b) {
  body();
}
#endif
  }

Clearly this isn't the correct indentation. A clean run under -Q behaves
the same way.



In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.20.6)
 of 2016-06-04 on juergen
Windowing system distributor `The X.Org Foundation', version 11.0.11803000
System Description:	Arch Linux

Configured using:
 `configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft
 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe
 -fstack-protector-strong' CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro'

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: C/l

Minor modes in effect:
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

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Memory information:
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Message #8 received at 24022 <at> debbugs.gnu.org (full text, mbox):

From: Alan Mackenzie <acm <at> muc.de>
To: robgssp <at> gmail.com
Cc: 24022 <at> debbugs.gnu.org
Subject: Re: bug#24022: 24.5; C indentation failure
Date: 21 Jul 2016 19:31:18 -0000

Hello, robgssp.

In article <mailman.1656.1468874050.26859.bug-gnu-emacs <at> gnu.org> you wrote:

> c-mode fails to indent correctly when a #if is followed by a
> comment. Example:

> int main() {
> #if defined(a) // comment
>   if (b) {
>   body();
> }
> #endif
>   }

> Clearly this isn't the correct indentation. A clean run under -Q behaves
> the same way.

Yes.

Thanks for taking the trouble to report this problem, and thanks even
more for cutting the source down to a small, easy to handle test case.

There have been extensive changes to CC Mode since the release of Emacs
24.5, and the problem isn't apparent in more recent versions.  Bisecting
the changes in mercurial suggest that this bug was "solved" by a commit on
2016-05-29.

I've tried to adapt this commit so that it will apply to the Emacs 24.5
sources, but the changes are just too many for this to be practicable.

Would it be OK for me to send you a tarball of the up-to-date CC Mode
sources (~1.34 Mb) so that you could build these on Emacs 24.5 and check
that the error really has been fixed (and not just in the cut down test
case you've sent me)?

> In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.20.6)
>  of 2016-06-04 on juergen
> Windowing system distributor `The X.Org Foundation', version 11.0.11803000
> System Description:     Arch Linux

> Configured using:
>  `configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
>  --localstatedir=/var --with-x-toolkit=gtk3 --with-xft
>  'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe
>  -fstack-protector-strong' CPPFLAGS=-D_FORTIFY_SOURCE=2
>  LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro'

> Important settings:
>   value of $LANG: en_US.UTF-8
>   locale-coding-system: utf-8-unix

> Major mode: C/l

-- 
Alan Mackenzie (Nuremberg, Germany).

Message #11 received at 24022 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Alan Mackenzie <acm <at> muc.de>
Cc: robgssp <at> gmail.com, 24022 <at> debbugs.gnu.org
Subject: Re: bug#24022: 24.5; C indentation failure
Date: Sun, 29 Sep 2019 07:02:35 +0200

Alan Mackenzie <acm <at> muc.de> writes:

> Hello, robgssp.
>
> In article <mailman.1656.1468874050.26859.bug-gnu-emacs <at> gnu.org> you wrote:
>
>> c-mode fails to indent correctly when a #if is followed by a
>> comment. Example:
>
>> int main() {
>> #if defined(a) // comment
>>   if (b) {
>>   body();
>> }
>> #endif
>>   }
>
>> Clearly this isn't the correct indentation. A clean run under -Q behaves
>> the same way.
>
> Yes.
>
> Thanks for taking the trouble to report this problem, and thanks even
> more for cutting the source down to a small, easy to handle test case.
>
> There have been extensive changes to CC Mode since the release of Emacs
> 24.5, and the problem isn't apparent in more recent versions.  Bisecting
> the changes in mercurial suggest that this bug was "solved" by a commit on
> 2016-05-29.
>
> I've tried to adapt this commit so that it will apply to the Emacs 24.5
> sources, but the changes are just too many for this to be practicable.
>
> Would it be OK for me to send you a tarball of the up-to-date CC Mode
> sources (~1.34 Mb) so that you could build these on Emacs 24.5 and check
> that the error really has been fixed (and not just in the cut down test
> case you've sent me)?

Hi Alan,

It looks like this has been fixed, but you were awaiting some further
verification from the reporter.  Did you ever get such verification?

If not, perhaps we should just close this if you can't reproduce it.

I can't reproduce it on current master using the example given above.

Best regards,
Stefan Kangas

Message #14 received at 24022 <at> debbugs.gnu.org (full text, mbox):

From: Alan Mackenzie <acm <at> muc.de>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: robgssp <at> gmail.com, 24022 <at> debbugs.gnu.org
Subject: Re: bug#24022: 24.5; C indentation failure
Date: Sun, 29 Sep 2019 08:13:43 +0000

Hello, Stefan

On Sun, Sep 29, 2019 at 07:02:35 +0200, Stefan Kangas wrote:
> Alan Mackenzie <acm <at> muc.de> writes:

> > Hello, robgssp.

> > In article <mailman.1656.1468874050.26859.bug-gnu-emacs <at> gnu.org> you wrote:

> >> c-mode fails to indent correctly when a #if is followed by a
> >> comment. Example:

> >> int main() {
> >> #if defined(a) // comment
> >>   if (b) {
> >>   body();
> >> }
> >> #endif
> >>   }

> >> Clearly this isn't the correct indentation. A clean run under -Q behaves
> >> the same way.

> > Yes.

> > Thanks for taking the trouble to report this problem, and thanks even
> > more for cutting the source down to a small, easy to handle test case.

> > There have been extensive changes to CC Mode since the release of Emacs
> > 24.5, and the problem isn't apparent in more recent versions.  Bisecting
> > the changes in mercurial suggest that this bug was "solved" by a commit on
> > 2016-05-29.

> > I've tried to adapt this commit so that it will apply to the Emacs 24.5
> > sources, but the changes are just too many for this to be practicable.

> > Would it be OK for me to send you a tarball of the up-to-date CC Mode
> > sources (~1.34 Mb) so that you could build these on Emacs 24.5 and check
> > that the error really has been fixed (and not just in the cut down test
> > case you've sent me)?

> Hi Alan,

> It looks like this has been fixed, but you were awaiting some further
> verification from the reporter.  Did you ever get such verification?

I never did, no.

> If not, perhaps we should just close this if you can't reproduce it.

We should indeed close it.  The problem has been solved.

> I can't reproduce it on current master using the example given above.

Indeed.  Does this go under "wontfix" or "solved", or some other status?
I marked it as "wontfix" in my own bug log, since I couldn't reasonably
fix it in Emacs 24.5.

> Best regards,
> Stefan Kangas

-- 
Alan Mackenzie (Nuremberg, Germany).

Message #17 received at 24022 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Alan Mackenzie <acm <at> muc.de>
Cc: robgssp <at> gmail.com, 24022 <at> debbugs.gnu.org
Subject: Re: bug#24022: 24.5; C indentation failure
Date: Sun, 29 Sep 2019 10:27:25 +0200

Hi Alan,

Alan Mackenzie <acm <at> muc.de> writes:

> > If not, perhaps we should just close this if you can't reproduce it.
>
> We should indeed close it.  The problem has been solved.

Great.

> > I can't reproduce it on current master using the example given above.
>
> Indeed.  Does this go under "wontfix" or "solved", or some other status?
> I marked it as "wontfix" in my own bug log, since I couldn't reasonably
> fix it in Emacs 24.5.

If we know a specific version when it was fixed, I guess "close 24022
25.1" is best (if 25.1 is indeed the version).  Otherwise, I see no
reason why we can't close it without any specific tag.

Best regards,
Stefan Kangas

Message #22 received at 24022-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Alan Mackenzie <acm <at> muc.de>
Cc: robgssp <at> gmail.com, 24022-done <at> debbugs.gnu.org
Subject: Re: bug#24022: 24.5; C indentation failure
Date: Wed, 30 Oct 2019 21:29:20 +0100

Stefan Kangas <stefan <at> marxist.se> writes:

>> > If not, perhaps we should just close this if you can't reproduce it.
>>
>> We should indeed close it.  The problem has been solved.
>
> Great.
>
>> > I can't reproduce it on current master using the example given above.
>>
>> Indeed.  Does this go under "wontfix" or "solved", or some other status?
>> I marked it as "wontfix" in my own bug log, since I couldn't reasonably
>> fix it in Emacs 24.5.
>
> If we know a specific version when it was fixed, I guess "close 24022
> 25.1" is best (if 25.1 is indeed the version).  Otherwise, I see no
> reason why we can't close it without any specific tag.

Closing this now.

Best regards,
Stefan Kangas

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