when we remove a terminal we should remove the vte widget and remove the reference to it from the TerminatorTerm object. It's likely we are still leaking other gtk objects, but that is considerably less important than leaking vte.Terminal objects and thus child processes

terminatorlib/terminator.py

@@ -770,13 +770,18 @@ class Terminator:
           grandparent.resize_children()
       if isinstance(sibling, TerminatorTerm) and isinstance(sibling.get_parent(), gtk.Notebook):
         sibling._titlebox.hide()
-        
+
+      widget._vte.get_parent().remove(widget._vte)
+      widget._vte = None
       self.term_list.remove (widget)
 
     elif isinstance (parent, gtk.Notebook):
       parent.remove(widget)
       nbpages = parent.get_n_pages()
       index = self.term_list.index (widget)
+
+      widget._vte.get_parent().remove(widget._vte)
+      widget._vte = None
       self.term_list.remove (widget)
       if nbpages == 1:
         if self.window.allocation.height != gtk.gdk.screen_height():