[pkg-cinnamon] Bug#827507: Bug#827507: cinnamon-settings segfaults on entering power settings applet

[Maximiliano Curia]

Control: clone -1 -2
Control: reassign -2 libupower-glib3 0.99.4-3
Control: severity -2 critical
Control: block -1 by -2

¡Hola!

El 2016-06-17 a las 08:17 +0200, Krzysztof Słychań escribió:
> Package: cinnamon 
> Version: 3.0.4-1 
> Severity: normal

> cinnamon-settings throws a segmentation fault whenever I try to open the power settings, 
> be it from the panel applet or the settings window.

> Steps to reproduce:
> 1. open "cinnamon-settings" in terminal 
> 2. enter the power settings 
> 3. EXPECTED: you have the power settings applet 
>   HAPPENS: window closes, you get segmentation fault:

> $ cinnamon-settings                                                                                                                               [0] 16-06-17 8:01 
> Loading Power module 
> [1]    (PID) segmentation fault  cinnamon-settings

> (tested on a clean boot, with the same result)
>
> Power management was working about a month ago or so - possibly a regression.
>
> I'm using systemd 230-2 and upower 0.99.4-3. 

This is caused by a change in the libupower-glib3 0.99.4-3, installing the 
0.99.4-2 version fixes the issue.

I'm cloning the bug to notify the upower maintainers about it.

Currently the cs_power module uses the gir interface doing:
 import gi
 gi.require_version('UPowerGlib', '1.0')
 from gi.repository import UPowerGlib

 up_client = UPowerGlib.Client()
 has_lid = up_client.get_lid_is_present()
------------

With the new version that snippet segfaults. I'm not well versed in the gi 
internals but it seems to me that UPowerGlib.Client() is not creating a new 
instance, probably related to the fact that it used to be a singleton, I'm not 
sure.

Using the similar version:
 import gi
 gi.require_version('UPowerGlib', '1.0')
 from gi.repository import UPowerGlib

 up_client = UPowerGlib.Client.new()
 has_lid = up_client.get_lid_is_present()
-------------

Works as expected in both versions, so I'll probably patch this in the next 
upload if it's not fixed in upower by then.

Happy hacking,
-- 
"Fighting patents one by one will never eliminate the danger of software
patents, any more than swatting mosquitoes will eliminate malaria."
-- Richard M. Stallman
Saludos /\/\ /\ >< `/
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