From a0f4efcd3dadcc0722816b1aa9cdcc52d8b3e1c6 Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Thu, 27 Feb 2014 18:16:09 +0100
Subject: [PATCH] cleanup after batch folding operation end even in case of
 exception: to avoid observing invalid fold regions on subsequent batch
 folding operations

---
 .../openapi/editor/impl/FoldingModelImpl.java | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/impl/FoldingModelImpl.java b/platform/platform-impl/src/com/intellij/openapi/editor/impl/FoldingModelImpl.java
index 962230e8680e..5cfc4d00facb 100644
--- a/platform/platform-impl/src/com/intellij/openapi/editor/impl/FoldingModelImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/impl/FoldingModelImpl.java
@@ -212,17 +212,20 @@ public class FoldingModelImpl implements FoldingModelEx, PrioritizedDocumentList
 
     myIsBatchFoldingProcessing = true;
     myFoldTree.myCachedLastIndex = -1;
-    operation.run();
-    myFoldTree.myCachedLastIndex = -1;
+    try {
+      operation.run();
+    } finally {
+      myFoldTree.myCachedLastIndex = -1;
 
-    if (!oldBatchFlag) {
-      if (myFoldRegionsProcessed) {
-        notifyBatchFoldingProcessingDone(moveCaret);
-        myFoldRegionsProcessed = false;
+      if (!oldBatchFlag) {
+        if (myFoldRegionsProcessed) {
+          notifyBatchFoldingProcessingDone(moveCaret);
+          myFoldRegionsProcessed = false;
+        }
+        myIsBatchFoldingProcessing = false;
       }
-      myIsBatchFoldingProcessing = false;
+      myDoNotCollapseCaret = oldDontCollapseCaret;
     }
-    myDoNotCollapseCaret = oldDontCollapseCaret;
   }
 
   @Override