Gtk tree model overrides are broken

The code below hangs:

local Gtk = require('lgi').require('Gtk', '2.0')
local Gdk = require('lgi').Gdk
local GObject = require('lgi').GObject

local model = Gtk.ListStore.newv {
	[1] = GObject.Type.STRING;
}

local item = model:append()
model:set(item, { "A" })

Interrupting the above script reveals that it spends most of its time recursively calling into the following function:

function Gtk.TreeModel:set(iter, values)
   -- Set all values provided by the table
   if Gtk.TreePath:is_type_of(iter) then iter = self:get_iter(iter) end
   self:set_values(iter, treemodel_prepare_values(self, values))
end

which shouldn't be there at all, as the GtkTreeModel interface doesn't actually guarantee that the model is writeable. Only GtkListStore and GtkTreeStore have set* methods.

(Tangentially, it would be nice if I could call Gtk.ListStore.new in Gtk 2.0 just like I can in Gtk 3.0.)

Start by tracing the Gtk.TreeModel:set override shown in the issue and compare it with the methods available on GtkListStore and GtkTreeStore. Run the provided Lua reproduction to confirm the recursive call; done means Gtk.TreeModel no longer exposes the invalid set override and the Gtk.ListStore example no longer hangs. The Gtk 2.0 Gtk.ListStore.new request is a separate tangential concern.