I to can confirm this bug.
When synaptic is run through the terminal, this error is thrown when trying to lock a package:
(synaptic:5092): Gtk-CRITICAL **: gtk_tree_model_get_iter: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(synaptic:5092): Gtk-CRITICAL **: gtk_tree_model_get: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
I to can confirm this bug.
When synaptic is run through the terminal, this error is thrown when trying to lock a package:
(synaptic:5092): Gtk-CRITICAL **: gtk_tree_ model_get_ iter: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(synaptic:5092): Gtk-CRITICAL **: gtk_tree_model_get: assertion `GTK_IS_TREE_MODEL (tree_model)' failed