From d7306187f46b11491bc26e3d1297bc0a8faca934 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 1 Mar 2017 09:19:18 +0100
Subject: [PATCH] PsiFileImpl: don't take stamp from invalid context (EA-97779
 - PIEAE: LeafPsiElement.invalid)

---
 .../core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java b/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java
index 05b4900ede1e..f6ba9fdb2368 100644
--- a/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java
+++ b/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java
@@ -406,7 +406,7 @@ public abstract class PsiFileImpl extends ElementBase implements PsiFileEx, PsiF
   @Override
   public long getModificationStamp() {
     PsiElement context = getContext();
-    PsiFile contextFile = context == null ? null : context.getContainingFile();
+    PsiFile contextFile = context == null || !context.isValid() ? null : context.getContainingFile();
     long contextStamp = contextFile == null ? 0 : contextFile.getModificationStamp();
     return myModificationStamp + contextStamp;
   }