4.0 regression: directory leaks

./vlc -Idummy ~/musique/Classique/Ludwig\ van\ Beethoven/
VLC media player 4.0.0-dev Otto Chriek (revision 4.0.0-dev-24434-ga57b38d530)
[000060600005e700] dummy interface: using the dummy interface module...
^C
=================================================================
==81939==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7fd01ced85cf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
    #1 0x7fd00d6a3129 in tracklist_append_event_create ../../modules/control/dbus/dbus_tracklist.c:41
    #2 0x7fd00d6b1f98 in playlist_on_items_added ../../modules/control/dbus/dbus.c:1063
    #3 0x7fd01c03e071 in vlc_playlist_ItemsInserted ../../src/playlist/content.c:76
    #4 0x7fd01c045b3e in vlc_playlist_Expand ../../src/playlist/content.c:382
    #5 0x7fd01c0537e8 in vlc_playlist_ExpandItem ../../src/playlist/preparse.c:59
    #6 0x7fd01c053942 in vlc_playlist_ExpandItemFromNode ../../src/playlist/preparse.c:76
    #7 0x7fd01c05397f in on_subtree_added ../../src/playlist/preparse.c:87
    #8 0x7fd01c070088 in OnParserSubtreeAdded ../../src/preparser/preparser.c:171
    #9 0x7fd01c08848b in input_item_parser_InputEvent ../../src/input/item.c:1402

and on and on.

Possibly caused by the D-Bus interface.