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bug#37910: CC Mode 5.33.2 (C++//l); CC-mode inconsistently indents every
From: |
Alan Mackenzie |
Subject: |
bug#37910: CC Mode 5.33.2 (C++//l); CC-mode inconsistently indents everything as topmost-intro after a while |
Date: |
Sun, 27 Oct 2019 15:39:56 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Hello, Eric.
On Thu, Oct 24, 2019 at 12:06:18 -0700, Eric Scrivner wrote:
> This seems related to (if not the same as) bug #5490.
> - This happens randomly and then randomly stops happening (cache expiry
> maybe?)
> - M-x revert-buffer does not fix.
Thanks for taking the trouble to report this bug, and thanks even more
for including so much information.
> Here's a snippet from the buffer at the time this happen, as you can see
> there seems to be a region until the end where everything becomes
> topmost-intro:
> } // ((block-close 18328))
> // ((statement 9560))
> SDL_DestroyWindow(Window); // ((statement 9560))
> } // ((block-close 9490))
> else // ((else-clause 9466))
> { //
> ((substatement-open 18464))
> PlatformLog("Failed to create window: %s", SDL_GetError()); //
> ((statement-block-intro 18473))
> } // ((block-close 18473))
> // ((topmost-intro 18576))
> // ((topmost-intro 18576))
> SDL_Quit(); // ((topmost-intro 18541))
> } // ((topmost-intro 18548))
> else // ((else-clause 9188))
> { // ((substatement-open 18845))
> PlatformLog("Failed to initialize SDL: %s", SDL_GetError()); //
> ((statement-block-intro 18901))((statement-block-intro 18724))
> } //
> ((block-close 18901))
> // ((topmost-intro 19093))
> return EXIT_SUCCESS; // ((topmost-intro 19093))
> } // ((topmost-intro 19242))
At the moment, all I can do is acknowledge receipt of your report. It's
obviously not an easy bug to diagnose.
I can see two ways of making progress: (i) Inspecting
c-guess-basic-syntax, the function which analyses code and produces
(amongs other things) all these topmost-intro's. It is essentially a
large cond form (Lisp's equivalent of a switch), and the single place
which produces topmost-intro comes fairly early on in this cond form;
(ii) Determine what aspects of a buffer do not get reinitialised after
evaluating M-x revert-buffer. That could provide some clue.
[ CC Mode config dump acknowledged with thanks, but snipped ]
Just one thing. If you haven't already done so, could you make a backup
copy of a buffer which triggers the bug, just in case after some future
edit it no longer does so. Thanks!
--
Alan Mackenzie (Nuremberg, Germany).
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Alan Mackenzie <=