java.lang.NullPointerException
   at com.sun.tools.javac.jvm.Code.emitop0(Code.java:558)
   at com.sun.tools.javac.jvm.Items$SelfItem.load(Items.java:367)
   at com.sun.tools.javac.jvm.Gen.genArgs(Gen.java:849)
Caused: java.lang.NullPointerException: Issue #246934 - method tree: 
static void <clinit>() {
    CUSTOM = new Generate$Type$1(this, "CUSTOM", 0);
    EXTEND = new Generate$Type$2(this, "EXTEND", 1);
    $VALUES = new Generate$Type[]{Generate$Type.CUSTOM, Generate$Type.EXTEND};
}
   at com.sun.tools.javac.jvm.Gen.visitNewClass(Gen.java:1833)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1659)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:830)
   at com.sun.tools.javac.jvm.Gen.visitAssign(Gen.java:1889)
   at com.sun.tools.javac.tree.JCTree$JCAssign.accept(JCTree.java:1844)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:830)
   at com.sun.tools.javac.jvm.Gen.visitExec(Gen.java:1683)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1422)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:620)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:655)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:641)
   at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:692)
   at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1040)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:620)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:655)
   at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:914)
   at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:877)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:842)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:620)
   at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2359)
   at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:739)
   at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1620)
   at com.sun.tools.javac.api.JavacTaskImpl$6.process(JavacTaskImpl.java:539)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:607)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:542)
   at org.netbeans.modules.java.source.indexing.OnePassCompileWorker$2.run(OnePassCompileWorker.java:287)
   at org.netbeans.modules.java.source.parsing.FileManagerTransaction.runConcurrent(FileManagerTransaction.java:205)
   at org.netbeans.modules.java.source.indexing.OnePassCompileWorker.compile(OnePassCompileWorker.java:284)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:261)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:161)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:298)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:159)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2773)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$800(RepositoryUpdater.java:2177)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2659)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2657)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:565)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2657)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3315)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3281)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$4.run(RepositoryUpdater.java:2150)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2146)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2127)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.access$1500(RepositoryUpdater.java:159)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:3281)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3800)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3435)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:6198)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4300(RepositoryUpdater.java:5849)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:6114)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:106)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6110)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6106)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:6106)
   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)