[Users] [Bug 3231] segfault on unload python

pf at pfortin.com pf at pfortin.com
Wed Jul 23 23:36:37 CEST 2014

On Wed, 23 Jul 2014 22:52:01 +0200 Holger Berndt wrote:

>On Mi, 23.07.2014 16:42, Pierre Fortin wrote:
>>>unloading the plugin (who would ever want to do that, anyways? ;)
>>It's been a while since I loaded Python...  was really trying to see if
>>this was how the Help->Python API Doc was added to the Help menu and
>>stumbled upon this...
>>Trying to find the instructions to do a better debug...  (asked on IRC)
>>Thanks for the response! Now to grok it... :)
>The example startup script also adds an interface to Claws-Mail on the
>session bus. So, any external program can trigger Claws Mail's menu
>items by calling this interface.
>If you don't want that, comment the last line in the startup script
>(dbus_interface = add_dbus_interface()) by preceding it with #. If my
>assumption is correct, your crash on plugin-unload should go away.
>The correct fix would be to unregister the D-Bus service again in the
>"shutdown" script, but I don't know enough Python D-Bus to do that.

Isolated it to the startup script just as your response came in...
commenting that line stops the crash.

Tried researching python-dbus stuff...  

Added this to startup:
OUT = open("/tmp/CMdbus",'w')
OUT.write("dbus_interface=%s\n" % dbus_interface)

dbus_interface=<dbus.service.BusName org.ClawsMail.PythonPlugin on
<dbus._dbus.SessionBus (session) at 0x31f6e30> at 0x3250210>

but you knew that... :)

So, assuming startup ends, I'm still looking for how to pass the dbus
info to a shutdown script in a way to issue a close()...

BTW, any objections to adding this line to the examples as first line?:
# -*- Mode: python; -*-
It tells emacs to load python-mode since the files don't end in .py

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