[ubuntu-mono] [Bug 1575182] Re: sysinfo crashes on ubuntu 16.04 (since upgrade)

[lotuspsychje]

reproduced this bug on 16.04 64bit clean install

installed sysinfo, after launch the tooltips showing up and when pressing on any value like cpu, sysinfo crashes
with the errors from salvia

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https://bugs.launchpad.net/bugs/1575182

Title:
  sysinfo crashes on ubuntu 16.04 (since upgrade)

Status in sysinfo package in Ubuntu:
  Confirmed

Bug description:
  I start it from the cli and the crash information is:

  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 () <0x40f74570 + 0x000a8> in <filename unknown>:0 
    at Sysinfo.Sysinfo.on_notebook1_switch_page (System.Object o, Gtk.SwitchPageArgs e) <0x40f6dda0 + 0x0011b> in <filename unknown>:0 
    at Gtk.Notebook.SwitchPageSignalCallback (IntPtr arg0, IntPtr arg1, UInt32 arg2, IntPtr gch) <0x40f6d580 + 0x002f7> 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 

  ------------------

  apt-cache policy sysinfo returns:
  sysinfo:
    Installed: 0.7-10
    Candidate: 0.7-10
    Version table:
   *** 0.7-10 500
          500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
          500 http://archive.ubuntu.com/ubuntu xenial/universe i386 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: sysinfo 0.7-10
  ProcVersionSignature: Ubuntu 4.4.0-22.38-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Tue Apr 26 15:08:14 2016
  InstallationDate: Installed on 2012-04-12 (1475 days ago)
  InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
  PackageArchitecture: all
  SourcePackage: sysinfo
  UpgradeStatus: Upgraded to xenial on 2016-04-24 (1 days ago)

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