java.lang.OutOfMemoryError: Java heap space
   at java.util.HashMap.resize(HashMap.java:703)
   at java.util.HashMap.putVal(HashMap.java:662)
   at java.util.HashMap.put(HashMap.java:611)
   at java.util.HashSet.add(HashSet.java:219)
   at org.netbeans.modules.html.editor.hints.css.CssClassesVisitor.createReversedMap(CssClassesVisitor.java:93)
   at org.netbeans.modules.html.editor.hints.css.CssClassesVisitor.<init>(CssClassesVisitor.java:81)
   at org.netbeans.modules.html.editor.hints.css.MissingClassRule.run(MissingClassRule.java:92)
   at org.netbeans.modules.html.editor.hints.HtmlHintsProvider.computeErrors(HtmlHintsProvider.java:321)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.processProviderErrors(GsfHintsProvider.java:321)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.processErrors(GsfHintsProvider.java:407)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.processErrorsRecursive(GsfHintsProvider.java:383)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.refreshErrors(GsfHintsProvider.java:351)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.access$000(GsfHintsProvider.java:101)
   at org.netbeans.modules.csl.hints.GsfHintsProvider$2.run(GsfHintsProvider.java:434)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:598)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.run(GsfHintsProvider.java:432)
   at org.netbeans.modules.csl.hints.GsfHintsProvider.run(GsfHintsProvider.java:101)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:573)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:744)
   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:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)