Segfault:
<?xml version="1.0"?>
<scenario id="soundfile" name="play soundfile" param="2" type="script">
  <init>
    <bridge>
    <server>
        <id>server1</id>
    </server>
    <client>
        <id>client2</id>
        <type>message</type>
        <destination>
           <value type="param">1</value>
        </destination>
    </client>
    <lifetime>100</lifetime>
    </bridge>

    <state>1</state>
  </init>

  <rules>
    <request>
       <bye>
          <rule id="1">
             <condition>
                <state>1</state>
                <sender>
                   <type>client</type>
                   <id>client2</id>
                </sender>
             </condition>
             <action>
             <send_reply>
                <code>200</code>
                <reason>OK</reason>
             </send_reply>
             <delete_entity/>
             <bridge>
                <server>
                   <id>server1</id>
                </server>
                <client>
                   <id>client3</id>
                   <destination>
                      <value type="param">2</value>
                   </destination>
                </client>
             </bridge>
             <state>2</state>
             </action>
             </rule>
         </bye>
      </request>
   </rules>
</scenario>

No more segfault:
<?xml version="1.0"?>
<scenario id="soundfile" name="play soundfile" param="2" type="script">
  <init>
    <bridge>
    <server>
        <id>server1</id>
    </server>
    <client>
        <id>client2</id>
        <type>message</type>
        <destination>
           <value type="param">1</value>
        </destination>
    </client>
    <lifetime>100</lifetime>
    </bridge>

    <state>1</state>
  </init>

  <rules>
    <request>
       <bye>
          <rule id="1">
             <condition>
                <state>1</state>
                <sender>
                   <type>client</type>
                   <id>client2</id>
                </sender>
             </condition>
             <action>
             <send_reply>
                <code>200</code>
                <reason>OK</reason>
             </send_reply>
             <delete_entity/>
             <bridge>
                <client>
                   <id>server1</id>
                </client>
                <client>
                   <id>client3</id>
                   <destination>
                      <value type="param">2</value>
                   </destination>
                </client>
             </bridge>
             <state>2</state>
             </action>
             </rule>
         </bye>
      </request>
   </rules>
</scenario>