From c4af1360fee2ca77af520095d9c2fc4928b682cb Mon Sep 17 00:00:00 2001
From: Dmitry Jemerov <yole@jetbrains.com>
Date: Tue, 21 Aug 2012 17:18:33 +0200
Subject: [PATCH] EA-38364 - IAE: PsiTreeUtil.isAncestor

---
 .../python/codeInsight/imports/PythonReferenceImporter.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/src/com/jetbrains/python/codeInsight/imports/PythonReferenceImporter.java b/python/src/com/jetbrains/python/codeInsight/imports/PythonReferenceImporter.java
index 1bd3a88d43f7..ff45a27fb12a 100644
--- a/python/src/com/jetbrains/python/codeInsight/imports/PythonReferenceImporter.java
+++ b/python/src/com/jetbrains/python/codeInsight/imports/PythonReferenceImporter.java
@@ -173,7 +173,7 @@ public class PythonReferenceImporter implements ReferenceImporter {
       PyFileImpl importSourceFile = (PyFileImpl)sourceFile;
       PsiElement res = importSourceFile.findExportedName(refText);
       // allow importing from this source if it either declares the name itself or represents a higher-level package that reexports the name
-      if (res != null && !(res instanceof PyFile) && !(res instanceof PyImportElement) &&
+      if (res != null && !(res instanceof PyFile) && !(res instanceof PyImportElement) && res.getContainingFile() != null &&
           PsiTreeUtil.isAncestor(source, res.getContainingFile(), false)) {
         existingImportFile = importSourceFile;
         fix.addImport(res, importSourceFile, importElement);