java.lang.NullPointerException
   at com.sun.tools.javac.util.Convert.packagePart(Convert.java:303)
   at com.sun.tools.javac.jvm.ClassReader.enterClass(ClassReader.java:2179)
   at com.sun.tools.javac.jvm.ClassReader.enterClass(ClassReader.java:2195)
   at com.sun.tools.javac.code.Types.boxedClass(Types.java:3164)
   at com.sun.tools.javac.comp.Attr.selectSym(Attr.java:2515)
   at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:2347)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1682)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribArgs(Attr.java:527)
   at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1545)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1326)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:453)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:426)
   at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:472)
   at com.sun.tools.javac.comp.Attr.attribLazyConstantValue(Attr.java:626)
   at com.sun.tools.javac.code.Symbol$VarSymbol$1.call(Symbol.java:994)
Caused: java.lang.AssertionError: java.lang.NullPointerException
   at com.sun.tools.javac.code.Symbol$VarSymbol.getConstValue(Symbol.java:1030)
   at com.sun.tools.javac.code.Symbol$VarSymbol.getConstantValue(Symbol.java:985)
   at org.netbeans.modules.java.source.indexing.CheckSums.getExtendedModifiers(CheckSums.java:183)
   at org.netbeans.modules.java.source.indexing.CheckSums.computeCheckSum(CheckSums.java:163)
   at org.netbeans.modules.java.source.indexing.CheckSums.checkAndSet(CheckSums.java:99)
   at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:269)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:200)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:162)
   at org.netbeans.modules.java.source.usages.ClassIndexManager.prepareWriteLock(ClassIndexManager.java:120)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:162)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:153)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:271)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:151)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:1868)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1400(RepositoryUpdater.java:1597)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:1778)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:1776)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:460)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:1776)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSource(RepositoryUpdater.java:3557)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSources(RepositoryUpdater.java:3458)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:3201)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2231)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:3988)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:3928)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:615)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:720)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)