#0  0xb7fdac31 in __kernel_vsyscall ()
#1  0xb7b01ea9 in __GI_raise (sig=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#2  0xb7b03407 in __GI_abort () at abort.c:89
#3  0xb6bdf325 in g_assertion_message (domain=0xb735dde3 "Gtk", file=0xb73ae5a0 "/build/gtk+3.0-QpXqW7/gtk+3.0-3.18.9/./gtk/gtkrbtree.c", line=914, func=0xb73aecd4 <__func__.30679> "_gtk_rbtree_node_find_offset", message=0x85dc320 "assertion failed: (node)")
    at /build/glib2.0-8EA4QF/glib2.0-2.48.1/./glib/gtestutils.c:2429
#4  0xb6bdf3ac in g_assertion_message_expr (domain=0xb735dde3 "Gtk", file=0xb73ae5a0 "/build/gtk+3.0-QpXqW7/gtk+3.0-3.18.9/./gtk/gtkrbtree.c", line=914, func=0xb73aecd4 <__func__.30679> "_gtk_rbtree_node_find_offset", expr=0xb73cac96 "node") at /build/glib2.0-8EA4QF/glib2.0-2.48.1/./glib/gtestutils.c:2452
#5  0xb722f471 in _gtk_rbtree_node_find_offset (tree=0x0, node=0x0)
    at /build/gtk+3.0-QpXqW7/gtk+3.0-3.18.9/./gtk/gtkrbtree.c:915
#6  0xb72fa675 in gtk_tree_view_update_rubber_band (tree_view=0x8246e90 [GtkTreeView]) at /build/gtk+3.0-QpXqW7/gtk+3.0-3.18.9/./gtk/gtktreeview.c:4485
#7  0xb72fa675 in gtk_tree_view_update_rubber_band (tree_view=0x8246e90 [GtkTreeView]) at /build/gtk+3.0-QpXqW7/gtk+3.0-3.18.9/./gtk/gtktreeview.c:4612
#8  0xb72fae67 in gtk_tree_view_drag_gesture_update (gesture=0xae901958 [GtkGestureDrag], offset_x=-243, offset_y=-58, tree_view=0x8246e90 [GtkTreeView])
    at /build/gtk+3.0-QpXqW7/gtk+3.0-3.18.9/./gtk/gtktreeview.c:4707
#9  0xb69c2e3a in ffi_call_SYSV () at ../src/x86/sysv.S:65
#10 0xb69c2aac in ffi_call (cif=0xbfffe354, fn=0xb72faac0 <gtk_tree_view_drag_gesture_update>, rvalue=0xbfffe2b0, avalue=0xbfffe270) at ../src/x86/ffi.c:389
#11 0xb7cb7743 in g_cclosure_marshal_generic_va (closure=0x84c94c0, return_value=0x0, instance=0xae901958, args_list=0xbfffe53c "", marshal_data=0x0, n_params=2, param_types=0x81aa5d8)
    at /build/glib2.0-8EA4QF/glib2.0-2.48.1/./gobject/gclosure.c:1604