From 40011f68b5aac9b05bf6b8d24b1c7e9cf3e4c69d Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 3 Jun 2015 17:00:06 +0200
Subject: [PATCH] SingleRootFileViewProvider: cache NULL_PSI_FILE

---
 .../src/com/intellij/psi/SingleRootFileViewProvider.java       | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java b/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java
index fa7b9b219a66..2752d06b31d4 100644
--- a/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java
+++ b/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java
@@ -174,6 +174,9 @@ public class SingleRootFileViewProvider extends UserDataHolderBase implements Fi
     PsiFile psiFile = myPsiFile.get();
     if (psiFile == null) {
       psiFile = createFile();
+      if (psiFile == null) {
+        psiFile = PsiUtilCore.NULL_PSI_FILE;
+      }
       boolean set = myPsiFile.compareAndSet(null, psiFile);
       if (!set) {
         if (psiFile instanceof PsiFileImpl) {