Paintbrush and Line/Curve with Undo crashes Pinta

[grofaty]

Pinta 1.6 using daily PPA on Ubuntu 14.04.

1. Paintbrush and draw something on canvas.
2. Line/Curve and draw one line on canvas.
3. Paintbrush and draw something on canvas.
4. Undo button twice and crash appears.
==============
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidCastException: Cannot cast from source type to destination type.
  at Pinta.Tools.BaseEditEngine.ActivateCorrespondingTool (ShapeTypes shapeType, Boolean permanentSwitch) [0x00000] in <filename unknown>:0
  at Pinta.Tools.BaseEditEngine.ActivateCorrespondingTool (Int32 shapeIndex, Boolean permanentSwitch) [0x00000] in <filename unknown>:0
  at Pinta.Tools.ShapesHistoryItem.Swap (Boolean redraw) [0x00000] in <filename unknown>:0
  at Pinta.Tools.ShapesHistoryItem.Undo () [0x00000] in <filename unknown>:0
  at Pinta.Core.DocumentWorkspaceHistory.Undo () [0x00000] in <filename unknown>:0
  at Pinta.Core.EditActions.HandlerPintaCoreActionsEditUndoActivated (System.Object sender, System.EventArgs e) [0x00000] in <filename unknown>:0
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  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
  --- End of inner exception stack trace ---
  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
==============

It may be related to bug 1419082, but I have reported a new bug report, because crash error is not the same.

[Cameron White (cameronwhite91)]

Probably related to bug #1419079

[Cameron White (cameronwhite91)]

Fixed: https://github.com/PintaProject/Pinta/commit/1d10afc23749f6a2b5f1982c7a26bd39904c7674