From 0360aeded1a1a3fd3c8c2715b09a63a8d70c060c Mon Sep 17 00:00:00 2001
From: "Egor.Ushakov" <egor.ushakov@jetbrains.com>
Date: Tue, 24 Feb 2015 16:45:00 +0300
Subject: [PATCH] EA-63794 - PIEAE: LeafPsiElement.invalid

---
 .../com/intellij/debugger/SourcePosition.java    | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/java/debugger/openapi/src/com/intellij/debugger/SourcePosition.java b/java/debugger/openapi/src/com/intellij/debugger/SourcePosition.java
index fc13858daac9..d10b656ad6a8 100644
--- a/java/debugger/openapi/src/com/intellij/debugger/SourcePosition.java
+++ b/java/debugger/openapi/src/com/intellij/debugger/SourcePosition.java
@@ -307,7 +307,10 @@ public abstract class SourcePosition implements Navigatable{
   }
      
   public static SourcePosition createFromElement(PsiElement element) {
-    final PsiElement navigationElement = element.getNavigationElement();
+    ApplicationManager.getApplication().assertReadAccessAllowed();
+    PsiElement navigationElement = element.getNavigationElement();
+    final SmartPsiElementPointer<PsiElement> pointer =
+      SmartPointerManager.getInstance(navigationElement.getProject()).createSmartPsiElementPointer(navigationElement);
     final PsiFile psiFile;
     if (JspPsiUtil.isInJspFile(navigationElement)) {
       psiFile = JspPsiUtil.getJspFile(navigationElement);
@@ -318,12 +321,19 @@ public abstract class SourcePosition implements Navigatable{
     return new SourcePositionCache(psiFile) {
       @Override
       protected PsiElement calcPsiElement() {
-        return navigationElement;
+        ApplicationManager.getApplication().assertReadAccessAllowed();
+        return pointer.getElement();
       }
 
       @Override
       protected int calcOffset() {
-        return navigationElement.getTextOffset();
+        return ApplicationManager.getApplication().runReadAction(new Computable<Integer>() {
+          @Override
+          public Integer compute() {
+            PsiElement elem = pointer.getElement();
+            return elem != null ? elem.getTextOffset() : -1;
+          }
+        });
       }
     };
   }