Pasting Unicode text into text widgets causes a crash.

[cfcohen]

This bug sadly appears to be related to this bug in mono. I found this bug and then that ticket while investigating a related issue where unicode characters do not appear to be displaying correctly in general within the MonoTrizbort (which also seems to be a Mono WinForms bug).

The exception for pasting some European special characters in the room description text field was:

System.ExecutionEngineException: String conversion error: Illegal byte sequence encounted in the input.
  at (wrapper managed-to-native) System.Runtime.InteropServices.Marshal.PtrToStringAnsi(intptr)
  at System.Windows.Forms.XplatUIX11.TranslatePropertyToClipboard (System.IntPtr property) [0x000f2] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.XplatUIX11.UpdateMessageQueue (System.Windows.Forms.XEventQueue queue, System.Boolean allowIdle) [0x00918] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.XplatUIX11.ClipboardRetrieve (System.IntPtr handle, System.Int32 type, System.Windows.Forms.XplatUI+ClipboardToObject converter) [0x0002f] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.XplatUI.ClipboardRetrieve (System.IntPtr handle, System.Int32 type, System.Windows.Forms.XplatUI+ClipboardToObject converter) [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Clipboard.GetDataObject (System.Boolean primary_selection) [0x00039] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Clipboard.GetDataObject () [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.TextBoxBase.Paste () [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.TextBox.paste_Click (System.Object sender, System.EventArgs e) [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.MenuItem.OnClick (System.EventArgs e) [0x00019] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.MenuItem.PerformClick () [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.MenuItem.PerformClick()
  at System.Windows.Forms.MenuTracker.OnMouseUp (System.Windows.Forms.MouseEventArgs args) [0x000bf] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Control.ProcessActiveTracker (System.Windows.Forms.Message& m) [0x00091] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Control.WmLButtonUp (System.Windows.Forms.Message& m) [0x00015] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x001b4] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.ScrollableControl.WndProc (System.Windows.Forms.Message& m) [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.ContainerControl.WndProc (System.Windows.Forms.Message& m) [0x00027] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Form.WndProc (System.Windows.Forms.Message& m) [0x00166] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x0000b] in <6d635ac3dc1c4424ad385ded79f1e868>:0 
  at System.Windows.Forms.NativeWindow.WndProc (System.IntPtr hWnd, System.Windows.Forms.Msg msg, System.IntPtr wParam, System.IntPtr lParam) [0x00085] in <6d635ac3dc1c4424ad385ded79f1e868>:0