Crash sharing to multiple users

When sharing a folder in U1 from nautilus, a crash can occur when sharing to multiple addresses:

Program received signal SIGSEGV, Segmentation fault.
__strlen_sse2_bsf () at ../sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S:51
51 ../sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S: No such file or directory.
(gdb) bt
#0 __strlen_sse2_bsf () at ../sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S:51
#1 0xb42e1922 in _dbus_string_init_const (str=0xbfffdf3c,
    value=0x101 <Address 0x101 out of bounds>) at ../../dbus/dbus-string.c:216
#2 0xb42cd990 in _dbus_check_is_valid_utf8 (
    name=0x101 <Address 0x101 out of bounds>)
    at ../../dbus/dbus-marshal-validate.c:1225
#3 0xb42d001d in dbus_message_iter_append_basic (value=0x9008afc, type=115,
    iter=0xbfffdfd8) at ../../dbus/dbus-message.c:2534
#4 dbus_message_iter_append_basic (iter=0xbfffdfd8, type=115, value=0x9008afc)
    at ../../dbus/dbus-message.c:2514
#5 0xb2b3727c in marshal_strv (iter=0xbfffe088, value=0x8af912c)
    at dbus-gvalue.c:1497
#6 0xb2b394d4 in _dbus_gvalue_marshal (iter=0xbfffe088, value=0x8af912c)
    at dbus-gvalue.c:2000
#7 0xb2b320c9 in dbus_g_proxy_marshal_args_to_message (proxy=<optimized out>,
    method=0xb2b1c4e3 "create_shares", args=0x86fbb80) at dbus-gproxy.c:2285
#8 0xb2b32189 in dbus_g_proxy_begin_call_internal (proxy=0x82a2c90,
    method=<optimized out>, notify=0xb2b152d0 <add_emblem_cb>,
    user_data=0x89bbd60, destroy=0, args=0x86fbb80, timeout=-1)
    at dbus-gproxy.c:2318
#9 0xb2b34ccc in dbus_g_proxy_begin_call (proxy=0x82a2c90,
    method=0xb2b1c4e3 "create_shares", notify=0xb2b152d0 <add_emblem_cb>,
    user_data=0x89bbd60, destroy=0, first_arg_type=64) at dbus-gproxy.c:2587
#10 0xb2b15e87 in syncdaemon_shares_interface_create ()
   from /usr/lib/libsyncdaemon-1.0.so.1
#11 0xb424cffb in dialog_response_cb (gtk_dialog=0x8559118, response=-3,
    user_data=0x0) at share-dialog.c:85