java.lang.NullPointerException
   at org.netbeans.modules.python.editor.scopes.ScopesCompiler.visitImport(ScopesCompiler.java:356)
   at org.python.antlr.ast.Import.accept(Import.java:131)
   at org.python.antlr.Visitor.visit(Visitor.java:26)
   at org.netbeans.modules.python.editor.scopes.ScopesCompiler.suite(ScopesCompiler.java:334)
   at org.netbeans.modules.python.editor.scopes.ScopesCompiler.visitModule(ScopesCompiler.java:181)
   at org.python.antlr.ast.Module.accept(Module.java:120)
   at org.python.antlr.Visitor.visit(Visitor.java:26)
   at org.netbeans.modules.python.editor.scopes.ScopesCompiler.parse(ScopesCompiler.java:138)
   at org.netbeans.modules.python.editor.scopes.SymbolTable.<init>(SymbolTable.java:140)
   at org.netbeans.modules.python.editor.PythonParserResult.getSymbolTable(PythonParserResult.java:107)
   at org.netbeans.modules.python.editor.PythonIndexer$IndexTask.scan(PythonIndexer.java:291)
   at org.netbeans.modules.python.editor.PythonIndexer.index(PythonIndexer.java:172)
   at org.netbeans.modules.gsfret.source.usages.SourceAnalyser.analyseUnitAndStore(SourceAnalyser.java:119)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex.runIndexers(PersistentClassIndex.java:164)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex.access$000(PersistentClassIndex.java:81)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex$2$1.run(PersistentClassIndex.java:208)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex$2$1.run(PersistentClassIndex.java:205)
   at org.netbeans.modules.gsfret.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:107)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex$2.run(PersistentClassIndex.java:204)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex$2.run(PersistentClassIndex.java:201)
   at org.netbeans.napi.gsfret.source.Source.runUserActionTask(Source.java:493)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex.updateDirty(PersistentClassIndex.java:201)
   at org.netbeans.modules.gsfret.source.usages.PersistentClassIndex.search(PersistentClassIndex.java:234)
   at org.netbeans.napi.gsfret.source.ClassIndex.search(ClassIndex.java:118)
   at org.netbeans.modules.python.editor.PythonIndex.search(PythonIndex.java:108)
   at org.netbeans.modules.python.editor.PythonIndex.getClasses(PythonIndex.java:241)
   at org.netbeans.modules.python.editor.PythonCodeCompleter.completeClasses(PythonCodeCompleter.java:1463)
   at org.netbeans.modules.python.editor.PythonCodeCompleter.complete(PythonCodeCompleter.java:333)
   at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.addCodeCompletionItems(GsfCompletionProvider.java:589)
   at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.resolveCompletion(GsfCompletionProvider.java:575)
   at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.run(GsfCompletionProvider.java:405)
   at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.run(GsfCompletionProvider.java:233)
   at org.netbeans.napi.gsfret.source.Source.runUserActionTask(Source.java:493)
   at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.query(GsfCompletionProvider.java:307)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:218)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1084)