An error occurred during parsing of 'D:\projects\FileChecker\src\org\inek\checker\DirContentChecker.java'. Please report a bug against java/source and attach dump file 'C:\Users\muellermi\AppData\Roaming\NetBeans\8.1beta\var\log\DirContentChecker.dump'. Caused: java.lang.NullPointerException at com.sun.tools.javac.comp.MemberEnter$Synthesizer.visit(MemberEnter.java:1710) at com.sun.tools.javac.comp.MemberEnter$9.getModelType(MemberEnter.java:1692) at com.sun.tools.javac.code.Symbol$ClassSymbol.getSuperclass(Symbol.java:1095) at com.sun.tools.javac.code.Types$18.visitClassType(Types.java:2326) at com.sun.tools.javac.code.Types$18.visitClassType(Types.java:2315) at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:778) at com.sun.tools.javac.code.Types$UnaryVisitor.visit(Types.java:4579) at com.sun.tools.javac.code.Types.supertype(Types.java:2312) at com.sun.tools.javac.code.Types$13.visitClassType(Types.java:1968) at com.sun.tools.javac.code.Types$13.visitClassType(Types.java:1957) at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:778) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4498) at com.sun.tools.javac.code.Types.asSuper(Types.java:1954) at com.sun.tools.javac.code.Types$4.visitClassType(Types.java:922) at com.sun.tools.javac.code.Types$4.visitClassType(Types.java:844) at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:778) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4498) at com.sun.tools.javac.code.Types.isSubtype(Types.java:840) at com.sun.tools.javac.code.Types.isSubtype(Types.java:804) at com.sun.tools.javac.code.Types.isSubtypeUncheckedInternal(Types.java:757) at com.sun.tools.javac.code.Types.isSubtypeUnchecked(Types.java:741) at com.sun.tools.javac.comp.Resolve$MethodCheckContext.compatible(Resolve.java:966) at com.sun.tools.javac.comp.Check.checkType(Check.java:557) at com.sun.tools.javac.comp.Attr$ResultInfo.check(Attr.java:478) at com.sun.tools.javac.comp.Resolve$MethodResultInfo.check(Resolve.java:1015) at com.sun.tools.javac.comp.Resolve$4.checkArg(Resolve.java:834) at com.sun.tools.javac.comp.Resolve$AbstractMethodCheck.argumentsAcceptable(Resolve.java:739) at com.sun.tools.javac.comp.Resolve$4.argumentsAcceptable(Resolve.java:843) at com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:584) at com.sun.tools.javac.comp.Resolve.selectBest(Resolve.java:1446) at com.sun.tools.javac.comp.Resolve.findMethodInScope(Resolve.java:1633) at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1704) at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1677) at com.sun.tools.javac.comp.Resolve$14.doLookup(Resolve.java:2688) at com.sun.tools.javac.comp.Resolve$BasicLookupHelper.lookup(Resolve.java:3096) at com.sun.tools.javac.comp.Resolve.lookupMethod(Resolve.java:3347) at com.sun.tools.javac.comp.Resolve.resolveOperator(Resolve.java:2684) at com.sun.tools.javac.comp.Resolve.resolveBinaryOperator(Resolve.java:2725) at com.sun.tools.javac.comp.Attr.visitBinary(Attr.java:3148) at com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:1791) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.visitParens(Attr.java:3072) at com.sun.tools.javac.tree.JCTree$JCParens.accept(JCTree.java:1667) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:614) at com.sun.tools.javac.comp.Attr.visitIf(Attr.java:1597) at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1275) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:657) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1130) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:915) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641) at com.sun.tools.javac.comp.Attr.visitForeachLoop(Attr.java:1196) at com.sun.tools.javac.tree.JCTree$JCEnhancedForLoop.accept(JCTree.java:1041) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:657) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1130) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:915) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641) at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1014) at org.netbeans.lib.nbjavac.services.NBAttr.visitMethodDef(NBAttr.java:76) at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:784) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641) at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4560) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4462) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4408) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4390) at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4365) at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1317) at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1290) at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:469) at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:448) at org.netbeans.modules.java.source.parsing.JavacParser.moveToPhase(JavacParser.java:641) at org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:496) at org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:162) at org.netbeans.modules.parsing.impl.TaskProcessor.callGetResult(TaskProcessor.java:631) at org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:262) at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:798) 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$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.openide.util.RequestProcessor$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)