From e65a6c4a2e8d4d76421e1c482730cf9f897d1f93 Mon Sep 17 00:00:00 2001
From: Dmitry Batrak <Dmitry.Batrak@jetbrains.com>
Date: Tue, 29 Dec 2015 17:05:16 +0300
Subject: [PATCH] EA-77138 - IOOBE: LineSet.findLineIndex

---
 .../codeInsight/folding/impl/UpdateFoldRegionsOperation.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java b/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java
index d3d159f2df39..3d55ed673c03 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java
@@ -248,7 +248,7 @@ class UpdateFoldRegionsOperation implements Runnable {
   }
 
   private boolean regionCanBeRemovedWhenCollapsed(FoldRegion region) {
-    return Boolean.TRUE.equals(region.getUserData(CAN_BE_REMOVED_WHEN_COLLAPSED)) || isRegionInCaretLine(region);
+    return Boolean.TRUE.equals(region.getUserData(CAN_BE_REMOVED_WHEN_COLLAPSED)) || !region.isValid() || isRegionInCaretLine(region);
   }
 
   private boolean isRegionInCaretLine(FoldRegion region) {