From 3d317b6157925af13c94d6f2361e29656ead28de Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 29 Jul 2015 09:28:48 +0200
Subject: [PATCH] use read action for PSI access in
 JavaFunctionalExpressionSearcher

---
 .../psi/impl/search/JavaFunctionalExpressionSearcher.java      | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFunctionalExpressionSearcher.java b/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFunctionalExpressionSearcher.java
index c3352222c3ec..236d6c979419 100644
--- a/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFunctionalExpressionSearcher.java
+++ b/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFunctionalExpressionSearcher.java
@@ -156,9 +156,10 @@ public class JavaFunctionalExpressionSearcher implements QueryExecutor<PsiFuncti
     final int expectedFunExprParamsCount = functionalInterfaceMethod.getParameterTypes().length;
     final FileBasedIndex fileBasedIndex = FileBasedIndex.getInstance();
     for (final PsiMethod psiMethod : lambdaCandidates) {
-      final int parametersCount = psiMethod.getParameterList().getParametersCount();
       ApplicationManager.getApplication().runReadAction(new Runnable() {
         public void run() {
+          if (!psiMethod.isValid()) return;
+          final int parametersCount = psiMethod.getParameterList().getParametersCount();
           final boolean varArgs = psiMethod.isVarArgs();
           final PsiParameter[] parameters = psiMethod.getParameterList().getParameters();
           final GlobalSearchScope methodUseScope = modulesScope.intersectWith(convertToGlobalScope(project, psiMethod.getUseScope()));