java.lang.NullPointerException at com.sun.tools.javac.comp.Check.checkImportedPackagesObservable(Check.java:3668) at com.sun.tools.javac.comp.TypeEnter.finishImports(TypeEnter.java:235) at com.sun.tools.javac.comp.TypeEnter.complete(TypeEnter.java:220) at com.sun.tools.javac.code.Symbol.complete(Symbol.java:582) at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1097) at com.sun.tools.javac.comp.Enter.complete(Enter.java:721) at com.sun.tools.javac.main.JavaCompiler.readSourceFile(JavaCompiler.java:795) at com.sun.tools.javac.main.JavaCompiler.readSourceFile(JavaCompiler.java:756) at com.sun.tools.javac.main.JavaCompiler.access$100(JavaCompiler.java:90) at com.sun.tools.javac.main.JavaCompiler$1.complete(JavaCompiler.java:324) at com.sun.tools.javac.code.ClassFinder.fillIn(ClassFinder.java:365) at com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:293) at com.sun.tools.javac.code.ClassFinder.access$000(ClassFinder.java:75) at com.sun.tools.javac.code.ClassFinder$1.complete(ClassFinder.java:169) at com.sun.tools.javac.code.Symbol.complete(Symbol.java:582) at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1097) at com.sun.tools.javac.code.Type$ClassType.complete(Type.java:1149) at com.sun.tools.javac.code.Type$ClassType.getTypeArguments(Type.java:1070) at com.sun.tools.javac.code.Type$ClassType.isErroneous(Type.java:1105) at com.sun.tools.javac.comp.Resolve.findGlobalType(Resolve.java:2020) at com.sun.tools.javac.comp.Resolve.findType(Resolve.java:2095) at com.sun.tools.javac.comp.Resolve.findIdent(Resolve.java:2124) at com.sun.tools.javac.comp.Resolve.resolveIdent(Resolve.java:2351) at com.sun.tools.javac.comp.Attr.visitIdent(Attr.java:3491) at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:2194) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3578) at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2075) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1928) at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1604) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:681) at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1687) at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1422) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:723) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1203) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704) at com.sun.tools.javac.comp.Attr.visitWhileLoop(Attr.java:1219) at com.sun.tools.javac.tree.JCTree$JCWhileLoop.accept(JCTree.java:1052) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:723) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1203) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704) at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1089) at org.netbeans.lib.nbjavac.services.NBAttr.visitMethodDef(NBAttr.java:76) at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:842) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:494) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:635) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:704) at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4678) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4577) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4505) at com.sun.tools.javac.api.JavacTrees.getElement(JavacTrees.java:409) at com.sun.tools.javac.api.JavacTrees.getElement(JavacTrees.java:156) at org.netbeans.api.java.source.TreePathHandle.create(TreePathHandle.java:248) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl.createBreadcrumbs(BreadCrumbsNodeImpl.java:206) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:492) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:471) at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:91) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106) at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:249) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1002) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:87) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:496) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.visitMethod(BreadCrumbsNodeImpl.java:501) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.visitMethod(BreadCrumbsNodeImpl.java:471) at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:874) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3.run(BreadCrumbsNodeImpl.java:471) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3.run(BreadCrumbsNodeImpl.java:460) at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:486) at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609) at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153) at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201) at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176) at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360) at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141) at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88) at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201) at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104) at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:436) at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:407) at org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl.getChildren(BreadCrumbsNodeImpl.java:460) at org.netbeans.modules.java.navigation.BreadCrumbsScanningTask.rootAndSelection(BreadCrumbsScanningTask.java:137) at org.netbeans.modules.java.navigation.BreadCrumbsScanningTask.run(BreadCrumbsScanningTask.java:105) at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584) at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:809) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304) at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725) at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.openide.util.RequestProcessor$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)