From fa8bda3a172cb8609129db7ac4517e262bfee852 Mon Sep 17 00:00:00 2001
From: Roman Shevchenko <roman.shevchenko@jetbrains.com>
Date: Wed, 7 Jan 2015 15:32:29 +0100
Subject: [PATCH] EA-63850 (ignore invalid elements)

---
 .../codeInsight/documentation/DocumentationManager.java     | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java b/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java
index e485a812d2ce..c5de46f9332a 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2012 JetBrains s.r.o.
+ * Copyright 2000-2015 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -264,6 +264,10 @@ public class DocumentationManager extends DockablePopupManager<DocumentationComp
   public void showJavaDocInfo(@NotNull final PsiElement element,
                               final PsiElement original,
                               @Nullable Runnable closeCallback) {
+    if (!element.isValid()) {
+      return;
+    }
+
     PopupUpdateProcessor updateProcessor = new PopupUpdateProcessor(element.getProject()) {
       @Override
       public void updatePopup(Object lookupItemObject) {