java.lang.UnsupportedOperationException
        at com.sun.tools.javac.jvm.ClassReader$SourceFileObject.getCharContent(ClassReader.java:2334)
        at com.sun.tools.javac.jvm.ClassReader$SourceFileObject.getCharContent(ClassReader.java:2290)
        at com.sun.tools.javac.util.DiagnosticSource.initBuf(DiagnosticSource.java:179)
        at com.sun.tools.javac.util.DiagnosticSource.findLine(DiagnosticSource.java:147)
        at com.sun.tools.javac.util.DiagnosticSource.getLineNumber(DiagnosticSource.java:71)
        at com.sun.tools.javac.util.JCDiagnostic.<init>(JCDiagnostic.java:295)
        at com.sun.tools.javac.util.JCDiagnostic$Factory.error(JCDiagnostic.java:86)
        at com.sun.tools.javac.util.AbstractLog.error(AbstractLog.java:92)
        at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:662)
        at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:656)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:381)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:418)
        at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2806)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2732)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2663)
        at com.sun.tools.javac.comp.Attr.visitClassDef(Attr.java:587)
        at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:587)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:381)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:418)
        at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2806)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2732)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2663)
        at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1123)
        at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:461)
        at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:609)
        at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:464)
        at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:512)
        at org.netbeans.modules.java.source.TreeLoader.dumpSymFile(TreeLoader.java:274)
        at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.dumpSymFiles(MultiPassCompileWorker.java:327)
        at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:119)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1$1.run(JavaCustomIndexer.java:139)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1$1.run(JavaCustomIndexer.java:124)
        at org.netbeans.modules.java.source.tasklist.TaskCache.refreshTransaction(TaskCache.java:470)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:124)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:122)
        at org.netbeans.modules.java.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:100)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:122)
        at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:157)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:1031)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:1316)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:1210)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:2115)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:2078)
        at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:588)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)