[Bug 1291958] [NEW] [Trusty]errors when using update-manager

[Guybrush88]

Public bug reported:

With Lubuntu Trusty (everything is up-to-date), I get these errors when
using update-manager with a terminal opened:

~$ update-manager
Error loading .desktop file /usr/share/applications/lubuntu-screenlock.desktop: constructor returned NULL
Error loading .desktop file /usr/share/applications/lubuntu-logout.desktop: constructor returned NULL
/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py:590: PyGTKDeprecationWarning: Stock items are deprecated. Please use: Gtk.Button.new_with_mnemonic(label)
  button = Gtk.Button(stock="gtk-cancel")

(process:2494): GLib-CRITICAL **: g_slice_set_config: assertion
'sys_page_size == 0' failed


Everything works fine, though

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1291958

Title:
  [Trusty]errors when using update-manager

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  With Lubuntu Trusty (everything is up-to-date), I get these errors
  when using update-manager with a terminal opened:

  ~$ update-manager
  Error loading .desktop file /usr/share/applications/lubuntu-screenlock.desktop: constructor returned NULL
  Error loading .desktop file /usr/share/applications/lubuntu-logout.desktop: constructor returned NULL
  /usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py:590: PyGTKDeprecationWarning: Stock items are deprecated. Please use: Gtk.Button.new_with_mnemonic(label)
    button = Gtk.Button(stock="gtk-cancel")

  (process:2494): GLib-CRITICAL **: g_slice_set_config: assertion
  'sys_page_size == 0' failed

  
  Everything works fine, though

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