g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x7f64d2dd9ac0 "_gtk_rbtree_node_find_offset", message=0x27eec40 "assertion failed: (node)") at /build/buildd/glib2.0-2.32.0/./glib/gtestutils.c:1861
g_assertion_message_expr (domain=0x7f64d2d312fd "Gtk", file=0x7f64d2dd9980 "/build/buildd/gtk+3.0-3.4.0/./gtk/gtkrbtree.c", line=914, func=0x7f64d2dd9ac0 "_gtk_rbtree_node_find_offset", expr=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gtestutils.c:1872
_gtk_rbtree_node_find_offset (tree=0x0, node=0x0) at /build/buildd/gtk+3.0-3.4.0/./gtk/gtkrbtree.c:914
gtk_tree_view_clamp_node_visible (node=0x0, tree=0x0, tree_view=0x260e020) at /build/buildd/gtk+3.0-3.4.0/./gtk/gtktreeview.c:9399
gtk_tree_view_clamp_node_visible (tree_view=0x260e020, tree=0x0, node=0x0) at /build/buildd/gtk+3.0-3.4.0/./gtk/gtktreeview.c:9388