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bug#5802: emacsclient -c crashes emacs --daemon intermittently; have str


From: Dan Nicolaescu
Subject: bug#5802: emacsclient -c crashes emacs --daemon intermittently; have strace
Date: Thu, 01 Apr 2010 15:50:05 -0400
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux)

Ryan Thompson <address@hidden> writes:

> On Tue, Mar 30, 2010 at 10:47 AM, Dan Nicolaescu <address@hidden> wrote:
>> Ryan Thompson <address@hidden> writes:
>>
>>> On Tue, Mar 30, 2010 at 8:46 AM, Dan Nicolaescu <address@hidden> wrote:
>>>> Ryan Thompson <address@hidden> writes:
>>>>
>>>>> I am trying to set myself up using emacs --daemon so that I can easily
>>>>> manage multiple emacs frames within one process. However, I have hit a
>>>>> significant stumbling block. If I run emacs --daemon (or emacs -nw and
>>>>> then do (server-start) ) and then repeatedly run emacsclient -c and
>>>>> clost the resulting window, emacs will randomly crash. Sometimes it
>>>>> happens on the first time that I run emacsclient -c, sometimes on the
>>>>> 20th.
>>>>>
>>>>> I use Ubuntu 9.10, and I have reported this bug in Launchpad. However,
>>>>> I have also compiled both emacs 23.1 and trunk from vanilla sources,
>>>>> and both of these exhibit the same bug as the Ubuntu-packaged
>>>>> versions.
>>>>>
>>>>> I have generated some stack traces by the following procedure, as
>>>>> described at https://bugs.launchpad.net/ubuntu/+source/emacs23/+bug/543611
>>>>>
>>>>> Open two terminals. In the first terminal, run the following commands
>>>>> to start emacs with strace:
>>>>>
>>>>> $ mkdir -p /tmp/emacs-strace
>>>>> $ strace -o /tmp/emacs-strace/trace-`date +%s`.log emacs -Q -nw
>>>>>
>>>>> When emacs has started, do M-x server-start so that emacsclient can
>>>>> work. Now, in the second terminal, run the following command:
>>>>>
>>>>> $ x=0; while emacsclient -c ; do x=$(( $x + 1 )); done; echo "Created
>>>>> $x windows before crash."
>>>>>
>>>>> Now, an emacs window will open. Close it. Each time you close a
>>>>> window, a new emacs window will open. Keep closing each one that
>>>>> appears. If emacs exhibits the bug, then eventually you will close one
>>>>> window, and emacs will crash when it tries to create the next one. At
>>>>> this point, you can go get your stack trace in /tmp/emacs-strace.
>>>>
>>>> This is very likely due to a long standing bug in Gtk+, see:
>>>> http://bugzilla.gnome.org/show_bug.cgi?id=85715
>>>>
>>>> Please compile emacs using
>>>>
>>>> ./configure --with-x-toolkit=lucid
>>>>
>>>> and try to reproduce the problem you are seeing with that emacs.
>>>>
>>>
>>> I tried that; same problem. Would you like a stack trace?
>>
>> Sure, for the lucid version please.
>> But please get the stack trace using by attaching gdb to emacs.
>> See etc/DEBUG for more info.
>>
>> Also, please start emacs using "emacs -Q"
>>
>>
>>
>
> I tried to figure out gdb, but I couldn't figure it out in the time I
> had. But I have been running all my tests with -Q. I'll try again when
> I have more time to mess around with it.

cd emacs/src
gdb ./emacs
run -Q -nw -f server-start


do whatever you do to to crash emacs, and when that happens type 

xbacktrace 

in gdb

Again, this is only useful for the version compiled using ./configure 
--with-x-toolkit=lucid






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