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

From: Ryan Thompson
Subject: bug#5802: emacsclient -c crashes emacs --daemon intermittently; have strace
Date: Wed, 31 Mar 2010 23:02:13 -0700

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.

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