From a0c1e02daac1ca84c03ca7f218d7cfbe4bb57d74 Mon Sep 17 00:00:00 2001
From: Dmitry Jemerov <yole@jetbrains.com>
Date: Fri, 26 Aug 2011 16:12:24 +0200
Subject: [PATCH] read access

---
 .../com/intellij/find/findUsages/FindUsagesHandler.java  | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesHandler.java b/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesHandler.java
index ac87016672cc..d8f46b768ed2 100644
--- a/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesHandler.java
+++ b/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesHandler.java
@@ -15,6 +15,7 @@
  */
 package com.intellij.find.findUsages;
 
+import com.intellij.openapi.application.AccessToken;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.application.ReadActionProcessor;
 import com.intellij.openapi.project.Project;
@@ -163,7 +164,13 @@ public abstract class FindUsagesHandler {
   @Nullable
   protected Collection<String> getStringsToSearch(final PsiElement element) {
     if (element instanceof PsiNamedElement) {
-      return ContainerUtil.createMaybeSingletonList(((PsiNamedElement)element).getName());
+      final AccessToken accessToken = ApplicationManager.getApplication().acquireReadActionLock();
+      try {
+        return ContainerUtil.createMaybeSingletonList(((PsiNamedElement)element).getName());
+      }
+      finally {
+        accessToken.finish();
+      }
     }
 
     return Collections.singleton(element.getText());