StacktraceTop:
g_type_check_instance_cast (type_instance=type_instance@entry=0x7f0238c31030, iface_type=139647518830528) at /build/buildd/glib2.0-2.37.3/./gobject/gtype.c:4008
dir_enum_async_ready (source=0x7f0238928b80, res=0x7f0238be2c10, user_data=user_data@entry=0x7f0238c31030) at bg-pictures-source.c:456
g_task_return_now (task=0x7f0238be2c10) at /build/buildd/glib2.0-2.37.3/./gio/gtask.c:1108
complete_in_idle_cb (task=0x7f0238be2c10) at /build/buildd/glib2.0-2.37.3/./gio/gtask.c:1117
g_main_dispatch (context=0x7f023881d0d0) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3058
StacktraceTop: check_instance_ cast (type_instance= type_instance@ entry=0x7f0238c 31030, iface_type= 139647518830528 ) at /build/ buildd/ glib2.0- 2.37.3/ ./gobject/ gtype.c: 4008 async_ready (source= 0x7f0238928b80, res=0x7f0238be2c10, user_data= user_data@ entry=0x7f0238c 31030) at bg-pictures- source. c:456 e2c10) at /build/ buildd/ glib2.0- 2.37.3/ ./gio/gtask. c:1108 in_idle_ cb (task=0x7f0238b e2c10) at /build/ buildd/ glib2.0- 2.37.3/ ./gio/gtask. c:1117 0x7f023881d0d0) at /build/ buildd/ glib2.0- 2.37.3/ ./glib/ gmain.c: 3058
g_type_
dir_enum_
g_task_return_now (task=0x7f0238b
complete_
g_main_dispatch (context=