qdbusinterface autotest fails to build

qdbusinterface autotest fails to build with the below error message

test@qttest:~/tmp/qt/tests/auto/qdbusinterface$ gmake
/export/home/test/bin/CC -c -g -mt -DQT_DBUS_LIB -DQT_CORE_LIB -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_SHARED -I../../../mkspecs/solaris-cc -I. -I../../../include/QtCore -I../../../include/QtDBus -I../../../include -I../../../include/QtTest -I.moc/debug-shared -I/usr/sfw/include -o .obj/debug-shared/tst_qdbusinterface.o tst_qdbusinterface.cpp
"../../../include/QtCore/../../src/corelib/kernel/qobjectdefs.h", line 270: Error: Cannot define a reference or pointer to a reference.
"tst_qdbusinterface.cpp", line 356: Where: While specializing "QArgument<QDBusVariant&>".
"tst_qdbusinterface.cpp", line 356: Where: Specialized in non-template code.
1 Error(s) detected.
gmake: *** [.obj/debug-shared/tst_qdbusinterface.o] Error 1