From ce1432abc6aa48d1d24b3ea75812eb43ae19a15b Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Mon, 3 Jul 2017 16:45:42 +0200
Subject: [PATCH] more future proof serializers initialization

---
 .../lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java b/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java
index 92aee80c17e5..2a814de3b2d7 100644
--- a/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java
+++ b/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java
@@ -120,7 +120,7 @@ public class StubUpdatingIndex extends CustomImplementationFileBasedIndexExtensi
   @Override
   public DataExternalizer<Collection<Integer>> createExternalizer() {
     return new DataExternalizer<Collection<Integer>>() {
-      private boolean myEnsuredStubElementTypesLoaded;
+      private volatile boolean myEnsuredStubElementTypesLoaded;
 
       @Override
       public void save(@NotNull DataOutput out, Collection<Integer> value) throws IOException {