Bug Report
https://bz.apache.org/bugzilla/show_bug.cgi?id=28820
Source Code
http://archive.apache.org/dist/ant/source/apache-ant-1.6.1-src.zip
EvoCrash Target Frame
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java.lang.ArrayIndexOutOfBoundsException: -1
    at org.apache.tools.ant.taskdefs.Concat$MultiReader.read(Concat.java:784)
    at org.apache.tools.ant.taskdefs.Concat.concatenate(Concat.java:513)
    at org.apache.tools.ant.taskdefs.Concat.cat(Concat.java:462)
    at org.apache.tools.ant.taskdefs.Concat.execute(Concat.java:371)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:269)

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