java.lang.NullPointerException
   at com.sun.tools.javac.jvm.Code.emitop0(Code.java:525)
   at com.sun.tools.javac.jvm.Items$SelfItem.load(Items.java:360)
   at com.sun.tools.javac.jvm.Gen.visitIdent(Gen.java:2103)
   at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:1683)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:835)
   at com.sun.tools.javac.jvm.Gen.visitApply(Gen.java:1677)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1299)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:835)
   at com.sun.tools.javac.jvm.Gen.genArgs(Gen.java:854)
   at com.sun.tools.javac.jvm.Gen.visitApply(Gen.java:1681)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1299)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:835)
   at com.sun.tools.javac.jvm.Gen.visitAssign(Gen.java:1776)
   at com.sun.tools.javac.tree.JCTree$JCAssign.accept(JCTree.java:1444)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:835)
   at com.sun.tools.javac.jvm.Gen.visitExec(Gen.java:1629)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1145)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:682)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:717)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:703)
   at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:754)
   at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1030)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:768)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:682)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:717)
   at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:910)
   at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:883)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:656)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:682)
   at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2222)
   at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:686)
   at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1358)
   at com.sun.tools.javac.api.JavacTaskImpl$3.process(JavacTaskImpl.java:519)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:607)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:522)
   at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:242)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1$1.run(JavaCustomIndexer.java:154)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1$1.run(JavaCustomIndexer.java:134)
   at org.netbeans.modules.java.source.tasklist.TaskCache.refreshTransaction(TaskCache.java:470)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:134)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:132)
   at org.netbeans.modules.java.source.usages.ClassIndexManager.reserveWriteLock(ClassIndexManager.java:113)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:132)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:165)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:1194)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.scanSource(RepositoryUpdater.java:2138)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.scanSources(RepositoryUpdater.java:2055)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:1825)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:1397)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:2476)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:2432)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:588)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
   at java.util.concurrent.FutureTask.run(FutureTask.java:123)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)
   at java.lang.Thread.run(Thread.java:595)