StacktraceTop: cairo_surface_get_type (surface=surface@entry=0x0) at ../../../../src/cairo-surface.c:221 set_surface_as_root (surface=0x0, screen=0x7f010d63a0d0) at greeterbackground.c:1610 greeter_background_save_xroot (background=<optimized out>) at greeterbackground.c:1019 start_session () at lightdm-gtk-greeter.c:2024 _g_closure_invoke_va (closure=0x0, closure@entry=0x7f010d68c550, return_value=0x7f010d5e8fb0, return_value@entry=0x0, instance=0x7f010d75c920, instance@entry=0x7f010d670850, args=0x33, args@entry=0x7fff46ec77e0, n_params=0, param_types=0x0) at /build/buildd/glib2.0-2.43.3/./gobject/gclosure.c:831
StacktraceTop: surface_ get_type (surface= surface@ entry=0x0) at ../../. ./../src/ cairo-surface. c:221 as_root (surface=0x0, screen= 0x7f010d63a0d0) at greeterbackgrou nd.c:1610 background_ save_xroot (background= <optimized out>) at greeterbackgrou nd.c:1019 gtk-greeter. c:2024 invoke_ va (closure=0x0, closure@ entry=0x7f010d6 8c550, return_ value=0x7f010d5 e8fb0, return_ value@entry= 0x0, instance= 0x7f010d75c920, instance@ entry=0x7f010d6 70850, args=0x33, args@entry= 0x7fff46ec77e0, n_params=0, param_types=0x0) at /build/ buildd/ glib2.0- 2.43.3/ ./gobject/ gclosure. c:831
cairo_
set_surface_
greeter_
start_session () at lightdm-
_g_closure_