I get:

TypeError: expected tuple for callback user_data

I also don't get how out_data is supposed be accessing "loop".

Yes, thanks for a quick response...
I update ubuntu, and i also see the typeError, this not appear on any place, some days ago, but clear this error it's not the cause, and this only force me to send an empty tuple instead of None value, because i do not need use any data. Sorry for have a loop out of scope, i try to make only an example, this is not my real code, and if i have an infinite loop, this not change any thing ofcourse.

New code without the typeError and without an infinite loop, but with the same core dump.

Thanks again!!!

#! /usr/bin/python3
# -*- coding: utf-8 -*-

from gi.repository import GObject
from gi.repository import PackageKitGlib as packagekit


loop = GObject.MainLoop()

def main():
    """Run a test application"""
    pk = packagekit.Client()
    pk.search_names_async(0, ["xterm",], None, progress_cb, (), out_data, ())
    print("exec")
    loop.run()

def progress_cb(status, typ, data=None):
    if status.get_property('package'):
        print("Pachet " + status.get_property('package') + " " + status.get_property('package-id'))
    print(str(typ))

def out_data(p, d, k):
    print("ready")
    loop.quit()

if __name__ == "__main__":
    main()

See also, that where i need to have without any problem the asyncronous version it's only on cjs(Cinnamon Java Script) because i can have my service or an thread enviroment and use the syncronous version, but i can not do that on cjs, because on cjs I have only one thread(the compositor thread), and if i try to use the syncronous version over the compositor thread then will be blocked all cinnamon activities for a while...

On my opinion this is not a problem of packagekit, it's a problem of the Gnome wrapper, but i can not be complete sure about that, and i think that we are more interested on this than Gnome proyect, They have more things to worry about...

We moved the upstream bugtracker to GitHub a long time ago. If this issue still affects you please re-create the issue here: https://github.com/hughsie/PackageKit/issues
 
Sorry for the impersonal message, and fingers crossed your issue no longer happens. Thanks.