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$IndexTask.scan(PythonIndexer.java:291)
        at org.netbeans.modules.python.editor.PythonIndexer.index(PythonIndexer.java:172)
        at org.netbeans.modules.gsfret.source.usages.SourceAnalyser.analyse(SourceAnalyser.java:102)
        at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.updateFile(RepositoryUpdater.java:1586)
        at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.access$2100(RepositoryUpdater.java:651)
        at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:912)
        at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:676)
        at org.netbeans.modules.gsfret.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:107)
        at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:676)
        at org.netbeans.modules.gsfret.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:651)
        at org.netbeans.napi.gsfret.source.Source$CompilationJob.run(Source.java:1355)
        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)