From 319a91bfc2cab4f2edda16632d992b243557d7b0 Mon Sep 17 00:00:00 2001
From: Dmitry Batkovich <dmitry.batkovich@jetbrains.com>
Date: Tue, 18 Oct 2016 17:57:55 +0300
Subject: [PATCH] javac ast indices: read access while get placement of element
 in asCompileElements()

---
 .../compiler/backwardRefs/CompilerReferenceServiceImpl.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/compiler/impl/src/com/intellij/compiler/backwardRefs/CompilerReferenceServiceImpl.java b/java/compiler/impl/src/com/intellij/compiler/backwardRefs/CompilerReferenceServiceImpl.java
index ccf1cbdbf8a6..1247e9344fea 100644
--- a/java/compiler/impl/src/com/intellij/compiler/backwardRefs/CompilerReferenceServiceImpl.java
+++ b/java/compiler/impl/src/com/intellij/compiler/backwardRefs/CompilerReferenceServiceImpl.java
@@ -278,7 +278,7 @@ public class CompilerReferenceServiceImpl extends CompilerReferenceService imple
     myReadDataLock.lock();
     try {
       if (myReader == null) return null;
-      VirtualFile file = PsiUtilCore.getVirtualFile(psiElement);
+      VirtualFile file = ReadAction.compute(() -> PsiUtilCore.getVirtualFile(psiElement));
       ElementPlace place = ElementPlace.get(file, myProjectFileIndex);
       if (place == null || (place == ElementPlace.SRC && myDirtyModulesHolder.contains(file))) {
         return null;