[GTK] crashes when trying to set data store on Eto.Test

[Miepee]

Expected Behavior

It shouldnt crash

Actual Behavior

It crashes:

Cairo.Surface is leaking, programmer is missing a call to Dispose
Set MONO_CAIRO_DEBUG_DISPOSE to track allocation traces

(Eto.Test.Gtk:130846): Gdk-WARNING **: 18:35:00.000: Server is missing xdg_foreign support

(Eto.Test.Gtk:130846): Gtk-WARNING **: 18:35:00.000: Unable to show '': Vorgang wird nicht unterstützt

(Eto.Test.Gtk:130846): Gdk-WARNING **: 18:35:01.089: Server is missing xdg_foreign support

(Eto.Test.Gtk:130846): Gtk-WARNING **: 18:35:01.089: Unable to show '': Vorgang wird nicht unterstützt
Cairo.Surface is leaking, programmer is missing a call to Dispose
Set MONO_CAIRO_DEBUG_DISPOSE to track allocation traces
Marshaling clicked signal
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: store
  at Eto.Forms.DataStoreExtensions.GetExpandedRowCount[T] (Eto.Forms.IDataStore`1[T] store, System.Int32 index) [0x00009] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/Forms/Controls/DaataStoreExtensions.cs:24 
  at Eto.GtkSharp.Forms.Controls.TreeGridViewHandler.SetSelectedRows (System.Collections.Generic.IEnumerable`1[T] value) [0x00033] in /home/narr/Dokumente/gitRepos/Eto/src/Eto.Gtk/Forms/Controls/TreeGridViewHandler.cs:449 
  at Eto.GtkSharp.Forms.Controls.GridHandler`2[TWidget,TCallback].UpdateModel () [0x00027] in /home/narr/Dokumente/gitRepos/Eto/src/Eto.Gtk/Forms/Controls/GridHandler.cs:105 
  at Eto.GtkSharp.Forms.Controls.TreeGridViewHandler+CollectionHandler.RemoveAllItems () [0x00001] in /home/narr/Dokumente/gitRepos/Eto/src/Eto.Gtk/Forms/Controls/TreeGridViewHandler.cs:96 
  at Eto.CollectionChangedHandler`2[TItem,TCollection].OnUnregisterCollection (System.EventArgs e) [0x00001] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/CollectionChangedHandler.cs:43 
  at Eto.CollectionChangedHandler`2[TItem,TCollection].Unregister () [0x00054] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/CollectionChangedHandler.cs:81 
  at Eto.GtkSharp.Forms.Controls.TreeGridViewHandler.set_DataStore (Eto.Forms.ITreeGridStore`1[T] value) [0x0000e] in /home/narr/Dokumente/gitRepos/Eto/src/Eto.Gtk/Forms/Controls/TreeGridViewHandler.cs:106 
  at Eto.Forms.TreeGridView.set_DataStore (Eto.Forms.ITreeGridStore`1[T] value) [0x00001] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/Forms/Controls/TreeGridView.cs:559 
  at Eto.Test.Sections.Controls.TreeGridViewSection.SetDataStore (Eto.Forms.TreeGridView grid) [0x00011] in /home/narr/Dokumente/gitRepos/Eto/test/Eto.Test/Sections/Controls/TreeGridViewSection.cs:34 
  at Eto.Test.Sections.Controls.GridViewSection`1+<>c__DisplayClass25_0[T].<SetDataButton>b__0 (System.Object sender, System.EventArgs e) [0x00000] in /home/narr/Dokumente/gitRepos/Eto/test/Eto.Test/Sections/Controls/GridViewSection.cs:350 
  at Eto.PropertyStore.TriggerEvent[T] (System.Object key, System.Object sender, T args) [0x00018] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/PropertyStore.cs:238 
  at Eto.Forms.Button.OnClick (System.EventArgs e) [0x00001] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/Forms/Controls/Button.cs:67 
  at Eto.Forms.Button+Callback.OnClick (Eto.Forms.Button widget, System.EventArgs e) [0x0000d] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/Forms/Controls/Button.cs:247 
  at Eto.GtkSharp.Forms.Controls.ButtonHandler`3+ButtonConnector[TControl,TWidget,TCallback].HandleClicked (System.Object sender, System.EventArgs e) [0x00012] in /home/narr/Dokumente/gitRepos/Eto/src/Eto.Gtk/Forms/Controls/ButtonHandler.gtk3.cs:52 
  at (wrapper managed-to-native) System.Reflection.RuntimeMethodInfo.InternalInvoke(System.Reflection.RuntimeMethodInfo,object,object[],System.Exception&)
  at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0006a] in /build/mono/src/mono/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:395 
   --- End of inner exception stack trace ---
  at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0007e] in /build/mono/src/mono/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:409 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in /build/mono/src/mono/external/corefx/src/Common/src/CoreLib/System/Reflection/MethodBase.cs:53 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x000e1] in /build/mono/src/mono/mcs/class/corlib/System/Delegate.cs:465 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00008] in /build/mono/src/mono/mcs/class/corlib/System/MulticastDelegate.cs:67 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in /build/mono/src/mono/mcs/class/corlib/System/Delegate.cs:410 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00034] in <f4e65a396f454052ac52b5e42c5f7520>:0 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00009] in <f4e65a396f454052ac52b5e42c5f7520>:0 
  at GLib.SignalClosure.MarshalCallback (System.IntPtr raw_closure, System.IntPtr return_val, System.UInt32 n_param_vals, System.IntPtr param_values, System.IntPtr invocation_hint, System.IntPtr marshal_data) [0x00080] in <f4e65a396f454052ac52b5e42c5f7520>:0 
  at GLib.ExceptionManager.RaiseUnhandledException (System.Exception e, System.Boolean is_terminal) [0x00000] in <f4e65a396f454052ac52b5e42c5f7520>:0 
  at GLib.SignalClosure.MarshalCallback (System.IntPtr raw_closure, System.IntPtr return_val, System.UInt32 n_param_vals, System.IntPtr param_values, System.IntPtr invocation_hint, System.IntPtr marshal_data) [0x00000] in <f4e65a396f454052ac52b5e42c5f7520>:0 
  at System.Object.wrapper_native_0x7f8ef21d8e50 () [0x00000] in <282c4228012f4f3d96bdf0f2b2dea837>:0 
  at Gtk.Application.Run () [0x00000] in <ba889255384849bea9fd387fe9008224>:0 
  at Eto.GtkSharp.Forms.ApplicationHandler.Run () [0x0004a] in /home/narr/Dokumente/gitRepos/Eto/src/Eto.Gtk/Forms/ApplicationHandler.cs:301 
  at Eto.Forms.Application.Run () [0x00000] in /home/narr/Dokumente/gitRepos/Eto/src/Eto/Forms/Application.cs:375 
  at Eto.Test.Gtk.Startup.Main (System.String[] args) [0x00029] in /home/narr/Dokumente/gitRepos/Eto/test/Eto.Test.Gtk/Startup.cs:17 

Steps to Reproduce the Problem

1. Click the "SetDataStore" button in the treegridviewtest in Eto.Test

Specifications

• Version: 2.7.3
• Platform(s): GTK
• Operating System(s): Arch Linux

[cwensley]

This was fixed recently with #2383