From 5fe3fbdf8e2428fff41273313e1a319fbca3c251 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Fri, 28 Aug 2015 12:51:05 +0200
Subject: [PATCH] injection is synchronized to document in a nonstandard way,
 so remove checkLengthConsistency assertion for them (WEB-17961)

---
 .../src/com/intellij/psi/SingleRootFileViewProvider.java      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java b/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java
index 3489ce3de3d8..edf0bbeae10d 100644
--- a/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java
+++ b/platform/core-impl/src/com/intellij/psi/SingleRootFileViewProvider.java
@@ -16,6 +16,7 @@
 package com.intellij.psi;
 
 import com.google.common.util.concurrent.Atomics;
+import com.intellij.injected.editor.DocumentWindow;
 import com.intellij.lang.Language;
 import com.intellij.lang.LanguageParserDefinitions;
 import com.intellij.lang.ParserDefinition;
@@ -542,6 +543,9 @@ public class SingleRootFileViewProvider extends UserDataHolderBase implements Fi
 
   private void checkLengthConsistency() {
     Document document = getCachedDocument();
+    if (document instanceof DocumentWindow) {
+      return;
+    }
     if (document != null &&
         ((PsiDocumentManagerBase)PsiDocumentManager.getInstance(myManager.getProject())).getSynchronizer().isInSynchronization(document)) {
       return;