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java.lang.ClassCastException: 	at java.util.jar.JarFile.getInputStream(JarFile.java:323)	at org.apache.tools.ant.loader.AntClassLoader2.addPathFile(AntClassLoader2.java:279)	at org.apache.tools.ant.AntClassLoader.addPathElement(AntClassLoader.java:481)	at org.apache.tools.ant.AntClassLoader.setClassPath(AntClassLoader.java:381)	at org.apache.tools.ant.Project.createClassLoader(Project.java:305)	at org.apache.tools.ant.taskdefs.Definer.createLoader(Definer.java:328)	at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:178)	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:185)	at org.apache.tools.ant.Task.perform(Task.java:348)	at org.apache.tools.ant.Target.execute(Target.java:309)	at org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:128)	at org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.java:119)	at org.apache.tools.ant.Main.runBuild(Main.java:595)	at org.apache.tools.ant.Main.start(Main.java:198)	at org.apache.tools.ant.Main.main(Main.java:245)