java.lang.NullPointerException
   at org.netbeans.modules.maven.execute.CommandLineOutputHandler.trimTree(CommandLineOutputHandler.java:569)
   at org.netbeans.modules.maven.execute.CommandLineOutputHandler.processExecEvent(CommandLineOutputHandler.java:477)
   at org.netbeans.modules.maven.execute.CommandLineOutputHandler.access$300(CommandLineOutputHandler.java:95)
   at org.netbeans.modules.maven.execute.CommandLineOutputHandler$Output.run(CommandLineOutputHandler.java:297)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
   at org.netbeans.modules.maven.execute.CommandLineOutputHandler.setStdOut(CommandLineOutputHandler.java:169)
   at org.netbeans.modules.maven.execute.MavenCommandLineExecutor.run(MavenCommandLineExecutor.java:303)
   at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)