java.lang.AssertionError at com.sun.tools.javac.util.Assert.error(Assert.java:155) at com.sun.tools.javac.util.Assert.check(Assert.java:46) at com.sun.tools.javac.comp.DeferredAttr$4.complete(DeferredAttr.java:344) at com.sun.tools.javac.comp.ArgumentAttr$ArgumentType.complete(ArgumentAttr.java:362) at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:306) at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:292) at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.recover(DeferredAttr.java:1020) at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.typeOf(DeferredAttr.java:991) at com.sun.tools.javac.comp.DeferredAttr$DeferredTypeMap.visitType(DeferredAttr.java:956) at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.visitType(DeferredAttr.java:979) at com.sun.tools.javac.comp.DeferredAttr$DeferredTypeMap.visitType(DeferredAttr.java:942) at com.sun.tools.javac.code.Type.accept(Type.java:214) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4722) at com.sun.tools.javac.code.Type$TypeMapping.lambda$visit$19(Type.java:235) at com.sun.tools.javac.util.List.map(List.java:425) at com.sun.tools.javac.code.Type$TypeMapping.visit(Type.java:235) at com.sun.tools.javac.code.Type$TypeMapping.visitMethodType(Type.java:287) at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.visitMethodType(DeferredAttr.java:1009) at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.visitMethodType(DeferredAttr.java:979) at com.sun.tools.javac.code.Type$MethodType.accept(Type.java:1463) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4722) at com.sun.tools.javac.code.Type$TypeMapping.visitForAll(Type.java:308) at com.sun.tools.javac.code.Type$TypeMapping.visitForAll(Type.java:227) at com.sun.tools.javac.code.Type$ForAll.accept(Type.java:1818) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4722) at com.sun.tools.javac.code.Type.map(Type.java:321) at com.sun.tools.javac.comp.Attr.checkMethodIdInternal(Attr.java:3894) at com.sun.tools.javac.comp.Attr.checkMethodId(Attr.java:3872) at com.sun.tools.javac.comp.Attr.checkId(Attr.java:3859) at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3744) at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2096) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1943) at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1620) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2599) at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1793) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.DeferredAttr$4.complete(DeferredAttr.java:345) at com.sun.tools.javac.comp.ArgumentAttr$ArgumentType.complete(ArgumentAttr.java:362) at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:306) at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:292) at com.sun.tools.javac.comp.Resolve$MethodResultInfo.check(Resolve.java:1042) at com.sun.tools.javac.comp.Resolve$4.checkArg(Resolve.java:865) at com.sun.tools.javac.comp.Resolve$AbstractMethodCheck.argumentsAcceptable(Resolve.java:765) at com.sun.tools.javac.comp.Resolve$4.argumentsAcceptable(Resolve.java:874) at com.sun.tools.javac.comp.Infer.instantiateMethod(Infer.java:190) at com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:595) at com.sun.tools.javac.comp.Resolve.checkMethod(Resolve.java:634) at com.sun.tools.javac.comp.Attr.checkMethod(Attr.java:4198) at com.sun.tools.javac.comp.Attr.checkIdInternal(Attr.java:3986) at com.sun.tools.javac.comp.Attr.checkMethodIdInternal(Attr.java:3893) at com.sun.tools.javac.comp.Attr.checkMethodId(Attr.java:3872) at com.sun.tools.javac.comp.Attr.checkId(Attr.java:3859) at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3744) at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2096) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1943) at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1620) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:691) at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1702) at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1438) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:715) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:739) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1223) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1006) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:715) at com.sun.tools.javac.comp.Attr.visitTry(Attr.java:1455) at com.sun.tools.javac.tree.JCTree$JCTry.accept(JCTree.java:1300) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:715) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:739) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1223) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1006) at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:504) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:645) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:715) at com.sun.tools.javac.comp.Attr.attribStatToTree(Attr.java:420) at com.sun.tools.javac.api.JavacTrees.attribStatToTree(JavacTrees.java:1012) at com.sun.tools.javac.api.JavacTrees.getAttrContext(JavacTrees.java:971) at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:830) at com.sun.tools.javac.api.JavacTrees.getScope(JavacTrees.java:166) at org.netbeans.modules.java.completion.BaseTask.getEnvImpl(BaseTask.java:399) at org.netbeans.modules.java.completion.BaseTask.getCompletionEnvironment(BaseTask.java:266) at org.netbeans.modules.java.completion.JavaCompletionTask.resolve(JavaCompletionTask.java:284) at org.netbeans.modules.java.completion.BaseTask.run(BaseTask.java:93) at org.netbeans.modules.java.completion.JavaCompletionTask.run(JavaCompletionTask.java:80) at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609) at org.netbeans.modules.parsing.api.ParserManager$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$2.call(TaskProcessor.java:201) at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176) at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360) at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141) at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:90) at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201) at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104) at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:222) at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223) 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$FastItem: task failed due to: java.lang.AssertionError