16:00:12 06:02             [jar-tool]
                       ==== stderr ====
                       java.lang.IllegalArgumentException: No enum constant org.pantsbuild.tools.jar.JarBuilder.DuplicateAction.CONCAT_TEXT
                       at java.lang.Enum.valueOf(Enum.java:238)
                       at org.pantsbuild.tools.jar.JarBuilder$DuplicateAction.valueOf(JarBuilder.java:123)
                       at org.pantsbuild.tools.jar.Main$Options$DuplicatePolicyParser$1.parse(Main.java:68)
                       at org.pantsbuild.tools.jar.Main$Options$DuplicatePolicyParser$1.parse(Main.java:61)
                       at org.pantsbuild.args4j.CollectionOptionHandler$1.parse(CollectionOptionHandler.java:66)
                       at org.kohsuke.args4j.spi.DelimitedOptionHandler.parseArguments(DelimitedOptionHandler.java:37)
                       at org.kohsuke.args4j.CmdLineParser.parseArgument(CmdLineParser.java:535)
                       at org.kohsuke.args4j.CmdLineParser.parseArgument(CmdLineParser.java:474)
                       at org.pantsbuild.args4j.Parser.parse(Parser.java:120)
                       at org.pantsbuild.tools.jar.Main.main(Main.java:470)
                       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                       at java.lang.reflect.Method.invoke(Method.java:497)
                       at com.martiansoftware.nailgun.NGSession.run(NGSession.java:280)

                       ==== stdout ====