java.io.IOException: Invalid argument
   at java.io.WinNTFileSystem.canonicalize0(WinNTFileSystem.java:0)
   at java.io.Win32FileSystem.canonicalize(Win32FileSystem.java:0)
   at java.io.File.getCanonicalPath(File.java:0)
   at java.io.File.getCanonicalFile(File.java:0)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.getFileObject(FolderObj.java:115)
   at org.netbeans.modules.web.common.api.WebUtils.resolveToReference(WebUtils.java:115)
   at org.netbeans.modules.css.indexing.CssIndex.getAllDependencies(CssIndex.java:292)
   at org.netbeans.modules.css.indexing.CssIndex.getDependencies(CssIndex.java:264)
   at org.netbeans.modules.css.gsf.CSSCompletion.complete(CSSCompletion.java:250)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.addCodeCompletionItems(GsfCompletionProvider.java:610)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.resolveCompletion(GsfCompletionProvider.java:598)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.access$400(GsfCompletionProvider.java:246)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery$1.run(GsfCompletionProvider.java:336)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:198)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:167)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:66)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:198)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.query(GsfCompletionProvider.java:322)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)