ARK-OS/arkos/arkrt/wayland/tests/data/bad-identifier-arg.xml

<?xml version="1.0" encoding="UTF-8"?>
<protocol name="the_protocol">
  <interface name="the_interface" version="1">
    <description summary="the summary">
    </description>
    <request name="the_request">
      <arg name="" type="uint"/>
    </request>
  </interface>
</protocol>