unity-settings-daemon crashed with SIGSEGV in idle_set_mode()

StacktraceTop:
 idle_set_mode (manager=manager@entry=0x5617bcd84430, mode=mode@entry=GSD_POWER_IDLE_MODE_BLANK) at gsd-power-manager.c:2413
 handle_screensaver_active (parameters=0x7fe01001f100, manager=0x5617bcd84430) at gsd-power-manager.c:2789
 screensaver_signal_cb (proxy=<optimized out>, sender_name=<optimized out>, signal_name=<optimized out>, parameters=0x7fe01001f100, user_data=<optimized out>) at gsd-power-manager.c:2801
 ffi_call_unix64 () from /tmp/apport_sandbox_3X0Xzm/usr/lib/x86_64-linux-gnu/libffi.so.6
 ffi_call () from /tmp/apport_sandbox_3X0Xzm/usr/lib/x86_64-linux-gnu/libffi.so.6

side effect from https://code.launchpad.net/~3v1n0/unity-settings-daemon/keep-cached-kbd-backlight-updated/+merge/294662, the upower_kbd_toggle return type changed and we need changes from https://git.gnome.org/browse/gnome-settings-daemon/commit/?id=5614e2c7a275a092e1fcf43450d7f0c5730c14bd

"- ret = upower_kbd_toggle (manager, &error);
+ value = upower_kbd_toggle (manager, &error);
+ ret = (value >= 0);"

This bug was fixed in the package unity-settings-daemon - 15.04.1+16.10.20160615-0ubuntu1

---------------
unity-settings-daemon (15.04.1+16.10.20160615-0ubuntu1) yakkety; urgency=medium

  [ Kai-Heng Feng ]
  * SettingsManager: Queue up signals before getting D-Bus connection.
    (LP: #1571640)

  [ Marco Trevisan (Treviño) ]
  * GsdPowerManager: use proper return value for upower_kbd_toggle
    wherever we use it (LP: #1592816)

 -- Marco Trevisan (Treviño) <mail@3v1n0.net> Wed, 15 Jun 2016 15:55:39 +0000

Hello Adam, or anyone else affected,

Accepted unity-settings-daemon into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/unity-settings-daemon/15.04.1+16.04.20160701-0ubuntu1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

This bug was fixed in the package unity-settings-daemon - 15.04.1+16.04.20160701-0ubuntu1

---------------
unity-settings-daemon (15.04.1+16.04.20160701-0ubuntu1) xenial; urgency=medium

  [ Robert Ancell ]
  * Correctly check value of XDG_CURRENT_DESKTOP.

  [ Marco Trevisan (Treviño) ]
  * PowerManager: connect to keyboard BrightnessChanged signal to update
    the cached current value properly (LP: #1510344)
  * GsdPowerManager: don't cache kbd backlight current value (LP:
    #1583861)
  * common: backport g-s-d commits for having single shared dbus proxies
  * ScreensaverProxy: redirect supported calls to gnome screensaver APIs
    (LP: #1415265, LP: #1584161)

  [ Sebastien Bacher ]
  * Don't hit an xerror when a device is removed while being configured
    (LP: #1503758)
  * wacom: don't segfault when a device is removed while being
    configured. (LP: #1439427)

  [ Marco Trevisan (Treviño) ]
  * GsdPowerManager: use proper return value for upower_kbd_toggle
    wherever we use it (LP: #1592816)

  [ Kai-Heng Feng ]
  * SettingsManager: Queue up signals before getting D-Bus connection.
    (LP: #1571640)

 -- Marco Trevisan (Treviño) <mail@3v1n0.net> Fri, 01 Jul 2016 13:28:54 +0000

The verification of the Stable Release Update for unity-settings-daemon has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.