* emacs hangs in c++ font-lock-modeo
[not found] <mailman.1466.1113474986.2895.bug-gnu-emacs@gnu.org>
@ 2005-04-16 16:50 ` Alan Mackenzie
2005-04-16 17:34 ` emacs hangs in c++ font-lock-mode Dirk Farin
0 siblings, 1 reply; 2+ messages in thread
From: Alan Mackenzie @ 2005-04-16 16:50 UTC (permalink / raw)
Cc: bug-gnu-emacs
[cc to bug-cc-mode@gnu.org added.]
>From d.s.farin@tue.nl Fri Apr 15 20:33:22 2005
> Hi,
> I have got a C++ source file that causes "GNU Emacs 21.4.1" (current Debian
> testing) to hang with 100% cpu. To reproduce the bug, load the attached
> source file and turn font-lock-mode on in C++ mode. If you move the cursor
> down, at some position, emacs will hang and accept no more keyboard inputs.
Outch! That's nasty. I had that happen to me a couple of years ago.
I know that everything will still be set up to their defaults, but could
you perhaps give us some more details just the same:
How powerful is your computer? (Processor speed in MHz or GHz).
What version of CC Mode have you got? (M-x c-version)
Did you start your session with "emacs -q --no-site-file"? (I.e. without
your .emacs and any site-lisp.el loaded.) If not, do you still get the
problem when you do?
Does Emacs _always_ hang up, _usually_ hang up or _sometimes_ hang up?
How long does it take after loading the file before it hangs? Does it
free up if you leave it running 8 or 12 hours or more?
How many other buffers have you got loaded at the same time, how big are
they (a few kilobytes, or a few hundred kilobytes), what modes are they
(other C++, perhaps)?
What support mode are you using in font lock? (C-h v
font-lock-support-mode). Probably jit-lock-mode, the default. Does the
problem go away if you use lazy lock instead? (Do M-: (setq
font-lock-support-mode 'lazy-lock-mode) before loading the buffer (or put
the setq in your .emacs, or do the same thing in the pertinent customize
buffer.))
Regards,
Dirk
[OT good news: My city council has just decided to use Debian as the
replacement for MS-Windows on its several thousand desktop PCs. They're
hoping to start rolling it out at the end of this year. :-]
--
Alan Mackenzie (Munich, Germany)
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: emacs hangs in c++ font-lock-mode
2005-04-16 16:50 ` emacs hangs in c++ font-lock-modeo Alan Mackenzie
@ 2005-04-16 17:34 ` Dirk Farin
0 siblings, 0 replies; 2+ messages in thread
From: Dirk Farin @ 2005-04-16 17:34 UTC (permalink / raw)
Cc: bug-cc-mode, bug-gnu-emacs
First the good news: the problem does not appear anymore in the current
Emacs CVS version 22.0.50 (with cc-mode 5.30.9).
>>I have got a C++ source file that causes "GNU Emacs 21.4.1" (current Debian
>>testing) to hang with 100% cpu. To reproduce the bug, load the attached
>>source file and turn font-lock-mode on in C++ mode. If you move the cursor
>>down, at some position, emacs will hang and accept no more keyboard inputs.
>
> I know that everything will still be set up to their defaults, but could
> you perhaps give us some more details just the same:
>
> How powerful is your computer? (Processor speed in MHz or GHz).
2.6 GHz, x86, but I tested on a variety of different systems with the
same result.
> What version of CC Mode have you got? (M-x c-version)
"Using CC Mode version 5.28"
> Did you start your session with "emacs -q --no-site-file"? (I.e. without
> your .emacs and any site-lisp.el loaded.) If not, do you still get the
> problem when you do?
Does not change anything.
> Does Emacs _always_ hang up, _usually_ hang up or _sometimes_ hang up?
always
> How long does it take after loading the file before it hangs? Does it
> free up if you leave it running 8 or 12 hours or more?
It occurs immediately. Start a new emacs, load the provided source code,
scroll down and it hangs.
I didn't check for several hours, but it stays locked for at least
10 minutes without increasing memory consumption.
> What support mode are you using in font lock? (C-h v
> font-lock-support-mode). Probably jit-lock-mode, the default. Does the
> problem go away if you use lazy lock instead? (Do M-: (setq
Yes, it it jit-lock-mode. If I switch to lazy mode, it locks already
while loading the file. Last message before it dies:
"Fontifying emacs_hang.cc... (regexps...............)"
> [OT good news: My city council has just decided to use Debian as the
> replacement for MS-Windows on its several thousand desktop PCs. They're
> hoping to start rolling it out at the end of this year. :-]
Ja, schoen. Habe ich auch gerade in den DLF Nachrichten gehoert.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2005-04-16 17:34 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <mailman.1466.1113474986.2895.bug-gnu-emacs@gnu.org>
2005-04-16 16:50 ` emacs hangs in c++ font-lock-modeo Alan Mackenzie
2005-04-16 17:34 ` emacs hangs in c++ font-lock-mode Dirk Farin
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.