Re: [Pyfltk-user] Mystery swig error when exiting pyfltk program

[Dima K. <di...@se...>]

Hi. Thanks for looking. I just dug into it a bit also, and it started to
look familiar. We already looked into this sort of thing here:

  https://sourceforge.net/p/pyfltk/mailman/pyfltk-user/thread/1014543129.14367.1712509274536%40bluewin.ch/#msg58757564

The punchline is that swig has a bug: it should do most of its
deallocation in tp_finalize, but instead it puts everything into
tp_destroy. This makes it possible for stuff to be cleaned-up out of
order. In THIS case it looks like the derived Fl_Window type in
Fl_Gl_Image_Widget is being cleaned up twice, or something of that
nature. I don't know if this swig problem is THE problem here, but it's
adjacent. Did either of you happen to talk to the swig folks about it
the last time around?

Thanks