From 116019cd3ade78a1ca958aa63e6c7d54b152390d Mon Sep 17 00:00:00 2001
From: Dmitry Batkovich <dmitry.batkovich@jetbrains.com>
Date: Fri, 28 Oct 2016 08:54:04 +0300
Subject: [PATCH] javac ast indices: NPE in isEnabledFor() for directory fixed

---
 .../compiler/backwardRefs/CompilerReferenceServiceImpl.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

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 ce0c9994bc70..013add71a911 100644
--- a/java/compiler/impl/src/com/intellij/compiler/backwardRefs/CompilerReferenceServiceImpl.java
+++ b/java/compiler/impl/src/com/intellij/compiler/backwardRefs/CompilerReferenceServiceImpl.java
@@ -34,6 +34,7 @@ import com.intellij.openapi.util.ModificationTracker;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.openapi.vfs.VirtualFileWithId;
 import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
 import com.intellij.psi.PsiNamedElement;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.psi.util.CachedValueProvider;
@@ -211,8 +212,9 @@ public class CompilerReferenceServiceImpl extends CompilerReferenceService imple
   }
 
   private boolean isServiceEnabledFor(PsiElement element) {
-    return isServiceEnabled() &&
-           !InjectedLanguageManager.getInstance(myProject).isInjectedFragment(ReadAction.compute(() -> element.getContainingFile()));
+    if (!isServiceEnabled()) return false;
+    PsiFile file = ReadAction.compute(() -> element.getContainingFile());
+    return file != null && !InjectedLanguageManager.getInstance(myProject).isInjectedFragment(ReadAction.compute(() -> element.getContainingFile()));
   }
 
   private boolean isServiceEnabled() {