From 6f7c522bbb4582aaae6d8b0725da038d1352ac2f Mon Sep 17 00:00:00 2001
From: Anna Kozlova <anna.kozlova@jetbrains.com>
Date: Fri, 24 Apr 2015 14:39:27 +0200
Subject: [PATCH] read action (EA-67476 - assert:
 FileDocumentManagerImpl.getDocument)

---
 .../codeInsight/navigation/ImplementationSearcher.java   | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/navigation/ImplementationSearcher.java b/platform/lang-impl/src/com/intellij/codeInsight/navigation/ImplementationSearcher.java
index ae1baf02da10..2dad9117b22c 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/navigation/ImplementationSearcher.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/navigation/ImplementationSearcher.java
@@ -25,6 +25,7 @@ import com.intellij.openapi.project.IndexNotReadyException;
 import com.intellij.openapi.project.DumbService;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Computable;
+import com.intellij.openapi.util.TextRange;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.search.PsiElementProcessor;
 import com.intellij.psi.search.PsiElementProcessorAdapter;
@@ -77,7 +78,13 @@ public class ImplementationSearcher {
       }
       return filterElements(element, all, offset);
     }
-    return (includeSelfAlways || includeSelfIfNoOthers) && element.getTextRange() != null ?
+    return (includeSelfAlways || includeSelfIfNoOthers) &&
+           ApplicationManager.getApplication().runReadAction(new Computable<TextRange>() {
+             @Override
+             public TextRange compute() {
+               return element.getTextRange();
+             }
+           }) != null ?
            new PsiElement[] {element} :
            PsiElement.EMPTY_ARRAY;
   }