Bug Report
https://issues.apache.org/bugzilla/show_bug.cgi?id=36733
Source Code
http://archive.apache.org/dist/ant/source/apache-ant-1.6.4-src.zip
EvoCrash Target Frame
2
java.lang.NullPointerException:
    at org.apache.tools.ant.taskdefs.optional.junit.XMLJUnitResultFormatter.formatOutput(XMLJUnitResultFormatter.java:253)
    at org.apache.tools.ant.taskdefs.optional.junit.XMLJUnitResultFormatter.setSystemOutput(XMLJUnitResultFormatter.java:92)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.sendOutAndErr(JUnitTestRunner.java:435)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:319)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
public void test0() throws Throwable {
    XMLJUnitResultFormatter xMLJUnitResultFormatter0 = new XMLJUnitResultFormatter();
    xMLJUnitResultFormatter0.setSystemOutput("");
}

The stack trace includes long qualified names, which is not possible to run on Windows – but possible on Mac.