bug#55230: CC Mode 5.35.1 (C++//l); Cache inconsistency

Alan Mackenzie <[email protected]> writes:

> On Thu, May 19, 2022 at 00:24:18 -0400, Michael Welsh Duggan wrote:
>
>> Unfortunately, it [the patch] has some major problems.  If you follow
>> the original recipe, after the first brace is input cc-mode errors out
>> with "Marker does not point anywhere".  Backtrace follows:
>
>> Debugger entered--Lisp error: (error "Marker does not point anywhere")
>>   c-restore-string-fences()
>>   c-electric-brace(nil)
>>   funcall-interactively(c-electric-brace nil)
>>   command-execute(c-electric-brace)
>
> Apologies for that.  I had failed to test the scenario from a freshly
> started Emacs.  The problem was setting and clearing text properties
> without masking before-change-functions and after-change-functions.
> This allowed a recursive call to these text property functions which
> fouled things up.
>
> This is now corrected.  Please undo the previous faulty patch and apply
> the one in this post instead.  I think it should have fixed the bug.
> Thanks!  I look forward to hearing from you again.

That seems to have done the trick.  Thank you!

>> >> > Emacs : GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, X
>> >> > toolkit, cairo version 1.16.0)
>> >> >  of 2022-04-09
>> >> > Package: CC Mode 5.35.1 (C++//l)
>> >> > Buffer Style: gnu
>> >> > c-emacs-features: (pps-extended-state col-0-paren
>> >> > posix-char-classes gen-string-delim gen-comment-delim
>> >> > syntax-properties 1-bit)

-- 
Michael Welsh Duggan
([email protected])