bug#45375: closed (cc-mode indentation sometimes doesn't work)

[GNU bug Tracking System]

Your message dated Tue, 23 Feb 2021 11:32:00 +0000
with message-id <YDTnsKwfsU0KFNkO@ACM>
and subject line Re: bug#46400: bug#45375: cc-mode indentation sometimes 
doesn't work
has caused the debbugs.gnu.org bug report #45375,
regarding cc-mode indentation sometimes doesn't work
to be marked as done.

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-- 
45375: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=45375
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> --- Begin Message ---
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> Subject: 
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> cc-mode indentation sometimes doesn't work
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> Date: 
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> Wed, 23 Dec 2020 00:02:17 +0100
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.1
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> On current master (6af31fd71ff1a403c199c479577bcc145a547db1) indentation 
> of C/C++ files sometimes doesn't work. I've bisected it: commit 
> "9022df7027 Optimise c-parse-state for large buffers with few (if any) 
> braces." introduced this behavior.
>
> This is how to reproduce: check out 
> 9022df70270243f211c54ccd66800320148b8434, and execute "emacs -Q 
> xdisp.c". Jump to line 2989 with M-g M-g 2989, move the cursor to the 
> end of line of "Lisp_Object retval;", and press enter. The cursor will 
> be moved to the correct place (correctly indented, cursor will be placed 
> below the 'L' character of the previous line). Then push enter at end of 
> line of "va_list ap;". For me, cursor will jump to the beginning of the 
> line, it won't be indented. If I keep pressing enters, the next failure 
> will be at "va_end (ap);". I'm not sure whether this exact steps 
> reproduces for everyone, but it happened me 5 of 5 trials. If I don't 
> press enter at the first line ("Lisp_Object retval;"), the problem 
> doesn't happen for any of this function lines. But it will happen for 
> somewhere else, if I keep trying (move around the file, press enter at 
> random places: if will fail sooner or later).
>
> For my configuration (without -Q), this problem happens quite frequently 
> during editing C++ code.
>
>
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> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Re: bug#46400: bug#45375: cc-mode indentation sometimes doesn't work
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> Date: 
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> Tue, 23 Feb 2021 11:32:00 +0000
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>
> Hello, Géza.
>
> On Sun, Feb 14, 2021 at 11:11:28 +0000, Alan Mackenzie wrote:
> > On Sat, Feb 13, 2021 at 19:43:31 +0100, Herman, Géza wrote:
>
> [ .... ]
>
> > In bug #46400, I think Konstantin's bisecting threw up the wrong commit,
> > since cache bugs tend to be very slippery to pin down.
>
> > > Thank you for looking at this!
>
> > A pleasure!  I intend to commit the patch below in a few days time, if I
> > don't hear back from anybody that it's giving trouble.  This patch fixes
> > the bug when applied to that commit from December
> > (9022df70270243f211c54ccd66800320148b8434).  It should apply cleanly to
> > master.
>
> I have now applied the patch to all the relevant places, and I am
> closing the bugs with this post.
>
> [ .... ]
>
> > > Geza
>
> -- 
> Alan Mackenzie (Nuremberg, Germany).
>
>
> --- End Message ---