GNU bug report logs - #213
Emacs hangs (font-lock-mode)

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: "Albert Neumüller" <albert.neu <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs hangs (font-lock-mode)
Date: Thu, 8 May 2008 10:19:02 +0200

Hello!

Emacs hangs during font-lock-mode (cc-mode).
How to reproduce:

Copy the C++ code below, into a buffer (e.g. tmp.cpp) with cc-mode and
font-lock-mode ON, and the go ahead and try changing
the line
#include "iostream"

to

#include <iostream"

.... Emacs should hang!

Which Emacs ??? ->
GNU Emacs 22.1.1 (i486-pc-linux-gnu, GTK+ Version 2.12.0)
 of 2008-05-02 on terranova, modified by Ubuntu

'hope this can be reproduced and solved!

Regards,
Albert


======== C++ Code ========


#include "iostream"

void func1()
{
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;
	std::cout<<"<->"<<std::endl;

}

======== end of C++ code =========





For your information:

In GNU Emacs 22.1.1 (i486-pc-linux-gnu, GTK+ Version 2.12.0)
 of 2008-05-02 on terranova, modified by Ubuntu
Windowing system distributor `The X.Org Foundation', version 11.0.10300000
configured using `configure  '--build' 'i486-linux-gnu' '--host'
'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib'
'--libexecdir=/usr/lib' '--localstatedir=/var'
'--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes'
'--enable-locallisppath=/etc/emacs22:/etc/emacs:/usr/local/share/emacs/22.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/22.1/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/22.1/leim'
'--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=i486-linux-gnu'
'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN
-DSITELOAD_PURESIZE_EXTRA=5000 -g -O2''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: C++/l

Minor modes in effect:
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  abbrev-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <menu-bar> <help-menu>
<report-emacs-bug>

Recent messages:
Loading debian-ispell...
Loading /var/cache/dictionaries-common/emacsen-ispell-default.el (source)...done
Loading debian-ispell...done
Loading /var/cache/dictionaries-common/emacsen-ispell-dicts.el (source)...done
Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...done
Loading /etc/emacs/site-start.d/50psvn.el (source)...done
For information about the GNU Project and its goals, type C-h C-p.
Loading cc-mode...done
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...done

Message #10 received at 213-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Albert Neumüller <albert.neu <at> gmail.com>
Cc: 213-done <at> debbugs.gnu.org
Subject: Re: Emacs hangs (font-lock-mode)
Date: Tue, 13 May 2008 13:04:00 -0400

"Albert Neumüller" <albert.neu <at> gmail.com> wrote:

> Emacs hangs during font-lock-mode (cc-mode).
> How to reproduce:
>
> Copy the C++ code below, into a buffer (e.g. tmp.cpp) with cc-mode and
> font-lock-mode ON, and the go ahead and try changing
> the line
> #include "iostream"
>
> to
>
> #include <iostream"
>
> .... Emacs should hang!
>
> Which Emacs ??? ->
> GNU Emacs 22.1.1 (i486-pc-linux-gnu, GTK+ Version 2.12.0)
>  of 2008-05-02 on terranova, modified by Ubuntu

I can't reproduce this bug, even Emacs 22.1.  Maybe it's cause by
something in your init file.  Can you reproduce it with `emacs -Q'
and/or with an unmodified emacs 22 as distributed from
http://ftp.gnu.org/pub/gnu/emacs/?

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