MetaSelectionSourceX11 leak
According to valgrind mutter is leaking X11 selection sources:
==24731== 26,976 (6,912 direct, 20,064 indirect) bytes in 96 blocks are definitely lost in loss record 24,956 of 25,118
==24731== at 0x4C9CA0D: g_type_create_instance (gtype.c:1845)
==24731== by 0x4C7E81E: g_object_new_internal (gobject.c:1923)
==24731== by 0x4C800BC: g_object_new_with_properties (gobject.c:2091)
==24731== by 0x4C80A68: g_object_new (gobject.c:1763)
==24731== by 0x58CD174: meta_selection_source_x11_new_async (meta-selection-source-x11.c:242)
==24731== by 0x58D1B91: meta_x11_selection_handle_xfixes_selection_notify (meta-x11-selection.c:315)
==24731== by 0x58D1B91: meta_x11_selection_handle_event (meta-x11-selection.c:334)
==24731== by 0x58CABFB: process_selection_event (events.c:1735)
==24731== by 0x58CABFB: meta_x11_display_handle_xevent (events.c:1802)
==24731== by 0x58CABFB: xevent_filter (events.c:1909)
==24731== by 0x5CCBF5C: gdk_event_apply_filters (gdkeventsource.c:79)
==24731== by 0x5CCC3B1: gdk_event_source_translate_event (gdkeventsource.c:198)
==24731== by 0x5CCC3B1: _gdk_x11_display_queue_events (gdkeventsource.c:341)
==24731== by 0x5C6C902: gdk_display_get_event (gdkdisplay.c:441)
==24731== by 0x5CCC00A: gdk_event_source_dispatch (gdkeventsource.c:363)
==24731== by 0x4D12045: g_main_dispatch (gmain.c:3185)
==24731== by 0x4D12045: g_main_context_dispatch (gmain.c:3850)