28c8dbf128
This happens in in Ardour's Preference dialog with e.g. BufferingOptions: ~OptionEditorContainer deletes the Option, which in turn deletes the Widget BufferingOptions:_buffering_presets_combo Since the widget is not managed it is not removed from its parent. Later ~OptionEditorContainer disposes the page layout, which eventually also calls the Frame d'tor, causing a heap-use-after-free.
Please see the Ardour web site at https://ardour.org/ for all documentation..
For information on building ardour:
https://ardour.org/development.html