[Bug 1579693] Re: sysinfo System selection aborts in Xubuntu 16.04

[rewound]

On selecting System...
freds at multivac16:~$ sysinfo
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.NullReferenceException: Object reference not set to an instance of an object
  at Sysinfo.SystemInfo.Gnome () <0xaec83fb0 + 0x00070> in <filename unknown>:0 
  at Sysinfo.Sysinfo.on_notebook1_switch_page (System.Object o, Gtk.SwitchPageArgs e) <0xaec7e000 + 0x00147> in <filename unknown>:0 
  at Gtk.Notebook.SwitchPageSignalCallback (IntPtr arg0, IntPtr arg1, UInt32 arg2, IntPtr gch) <0xb1412a58 + 0x00251> in <filename unknown>:0 
  at GLib.ExceptionManager.RaiseUnhandledException (System.Exception e, Boolean is_terminal) [0x00000] in <filename unknown>:0 
  at Gtk.Notebook.SwitchPageSignalCallback (IntPtr arg0, IntPtr arg1, UInt32 arg2, IntPtr gch) [0x00000] in <filename unknown>:0 
  at Gtk.Notebook.gtk_notebook_set_current_page (IntPtr , Int32 ) [0x00000] in <filename unknown>:0 
  at Gtk.Notebook.set_CurrentPage (Int32 value) [0x00000] in <filename unknown>:0 
  at Sysinfo.Sysinfo.on_treeview1_cursor_changed (System.Object o, System.EventArgs e) [0x00000] in <filename unknown>:0 
  at System.Reflection.MonoMethod.InternalInvoke (System.Reflection.MonoMethod , System.Object , System.Object[] , System.Exception& ) [0x00000] in <filename unknown>:0 
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <filename unknown>:0 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] in <filename unknown>:0 
  at Gtk.Application.gtk_main () [0x00000] in <filename unknown>:0 
  at Gtk.Application.Run () [0x00000] in <filename unknown>:0 
  at Sysinfo.Sysinfo..ctor (System.String[] args) [0x00000] in <filename unknown>:0 
  at Sysinfo.Sysinfo.Main (System.String[] args) [0x00000] in <filename unknown>:0 
freds at multivac16:~$

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https://bugs.launchpad.net/bugs/1579693

Title:
  sysinfo System selection aborts in Xubuntu 16.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  
  Hardware setup unchanged: Acer Aspire One

  Old: Peppermint 3 (Note: Peppermint 4 was based on the Ubuntu 13.04)
  Kernel 3.2.0-48-generic

  sysinfo version 0.7 - all selections (System CPU Memory Storage
  Hardware) work properly.

  New: Xubuntu 16.04
  Kernel $ uname -a
  Linux mvac16 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:52:40 UTC 2016 i686 i686 i686 GNU/Linux

  sysinfo version 0.7
  Press CPU Memory Storage Hardware - these all work properly.
  Press System - the application exits.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.14
  ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
  Uname: Linux 4.4.0-22-generic i686
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: i386
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Mon May  9 11:00:18 2016
  InstallationDate: Installed on 2016-05-07 (2 days ago)
  InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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