Description of problem:
I'm testing dbus-glib through standard tests included in dbus-glib source codes.
There is one test called test-service-glib (in DBUS_GLIB_SRC/tests/core/),
which provides couple of methods that can be called via dbus. One of these methods causes error (see "Steps to reproduce" below).

Version-Release number of selected component (if applicable):
dbus-1.1.2-12.el5
dbus-glib-0.73-8.el5

How reproducible:
100%

Steps to Reproduce:
1. Download dbus-glib src and compile it with (./configure --enable-tests --enable-asserts).
2. Run test-service-glib (located in test/core).
3. Try send this message: 
	dbus-send --dest=org.freedesktop.DBus.GLib.TestService --print-reply --type=method_call /org/freedesktop/DBus/GLib/Tests/MyTestObject org.freedesktop.DBus.GLib.Tests.MyObject.StrHashLen dict:string:string:"key","value"
  
Actual results:

process 16443: arguments to dbus_message_iter_open_container() were incorrect, assertion "(type == DBUS_TYPE_STRUCT && contained_signature == NULL) || (type == DBUS_TYPE_DICT_ENTRY && contained_signature == NULL) || (type == DBUS_TYPE_VARIANT && contained_signature != NULL) || (type == DBUS_TYPE_ARRAY && contained_signature != NULL)" failed in file dbus-message.c line 2356.
This is normally a bug in some application using the D-Bus library.
process 16443: dbus message iterator looks uninitialized or corrupted
process 16443: arguments to dbus_message_iter_append_basic() were incorrect, assertion "_dbus_message_iter_append_check (real)" failed in file dbus-message.c line 2239.
This is normally a bug in some application using the D-Bus library.
process 16443: dbus message iterator looks uninitialized or corrupted
process 16443: arguments to dbus_message_iter_append_basic() were incorrect, assertion "_dbus_message_iter_append_check (real)" failed in file dbus-message.c line 2239.
This is normally a bug in some application using the D-Bus library.
process 16443: dbus message iterator looks uninitialized or corrupted
process 16443: arguments to dbus_message_iter_close_container() were incorrect, assertion "_dbus_message_iter_append_check (real_sub)" failed in file dbus-message.c line 2414.
This is normally a bug in some application using the D-Bus library.
method return sender=:1.845 -> dest=:1.863 reply_serial=2
   uint32 0

Expected results:

Should end without errors.

Additional info: