Re: wx.menu.Insert leads to StackHash error when the program closes

On Mon, 16 Jul 2018, ABC wrote:

> I ported my code from Python 2.7/wxPython 3.0.2   to   Python 3.7/wxPython
> 4.0.3, on Windows 7 32-bit.
> I use PopupMenu() with a menu that has a sub-menu.
> That sub-menu is added to the menu with Insert().
> Now, everytime the program exits, I get a StachHash_0a9e fault from Windows.
> If I use Prepend() instead, all is good.
> 
> The code below demonstrates this issue.
> I also see that in this code, defining self.menu ahead of self.submenu, will
> make the error go away.
> 
> import wx
> class Main_Frame(wx.Frame):
>     def __init__(self):
>         wx.Frame.__init__(self, parent = None, id = -1, title = 'Test menu
> insert', style = wx.DEFAULT_FRAME_STYLE)
> 
>         self.submenu = wx.Menu()
>         self.submenu.Append(-1, 'Sub-menu')
> 
>         self.menu = wx.Menu()
> 
>         # ---- Insert vs. Prepend ----
>         self.menu.Insert(0, -1, '...to sub-menu', self.submenu)
>         #self.menu.Prepend(-1, '...to sub-menu', self.submenu)
> 
> class App(wx.App):
>     def __init__(self, redirect_ = False, redirect_filename_ = None):
>         wx.App.__init__(self, redirect = redirect_, filename =
> redirect_filename_)
> 
>     def OnInit(self):
>         self.frame = Main_Frame()
>        
>         self.frame.Show()
>         self.SetTopWindow(self.frame)
> 
>         self.frame.PopupMenu(self.frame.menu, (10,10))
>         return True
> 
> def main():
>     app = App()
>     app.MainLoop()
>     return False
> 
> if __name__ == '__main__':
>     main()

This is a bug in the memory management code for Insert().  It looks like 
it is supposed to be set correctly, but its not getting set in the 
generated code for some reason.

I filed this for you:
https://github.com/wxWidgets/Phoenix/issues/931

Scott

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