Filterchain's LineContains on LoadProperties is blocking the reading of properties

Hi,

  I am trying to selectively load properties using the LoadProperties and
FilterChain+LineContains tasks. However based on my test if the Filterchain
starts to contain any "<contains/>" element then it will start discarding
all contents of the property file being read. This was tested  using  ant
1.10.1 adn 1.10.3 in a Java 1.8 VM hosted in a Windows 10 64-bit machine.

  Below is my build xml and sample.properties file. The initialize target
has different variations that I tried to do to isolate the problem. What
could be the problem in this instance? Thanks.

-- build.xml  ---

<project name="MyProject" basedir=".">
  <target name="initialize">
    <echo>Starting load...</echo>
    <loadproperties srcFile="${basedir}/01_PropertyFiles/sample.properties">

      <filterchain>
        <linecontains>
          <contains value="ws.user" />
          <contains value="ws.password" />
          <contains value="wl.user" />
          <contains value="wl.password" />
        </linecontains>
      </filterchain>

      <!--filterchain>

      <filterreader classname="org.apache.tools.ant.filters.LineContains">
        <param type="contains" value="user"/>
        <param type="contains" value="password"/>
      </filterreader>


      </filterchain-->


    </loadproperties>
    <echo>${ws.user} - ${ws.password}</echo>
    <echo>${wl.user} - ${wl.password}</echo>

    <echo>${placebo.prop} should be printed as a literal. </echo>

  </target>

</project>


-- end of build.xml  ---

---- sample.properties ----
placebo.prop=dontprintme
ws.user=dilbert
ws.password=washere
wl.user=felix
wl.password=lantern

ps.xser=dummy
---- end of sample.properties ----


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