diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/impl/view/LogicalPositionCache.java b/platform/platform-impl/src/com/intellij/openapi/editor/impl/view/LogicalPositionCache.java
index b202bff7b8ac..59da88e8c9b1 100644
--- a/platform/platform-impl/src/com/intellij/openapi/editor/impl/view/LogicalPositionCache.java
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/impl/view/LogicalPositionCache.java
@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2016 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.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.openapi.editor.impl.view;
 
 import com.intellij.diagnostic.Dumpable;
@@ -65,10 +51,14 @@ class LogicalPositionCache implements PrioritizedDocumentListener, Disposable, D
 
   @Override
   public void documentChanged(DocumentEvent event) {
-    int startLine = myDocument.getLineNumber(event.getOffset());
-    int newEndLine = getAdjustedLineNumber(event.getOffset() + event.getNewLength());
-    invalidateLines(startLine, myDocumentChangeOldEndLine, newEndLine, isSimpleText(event.getNewFragment()));
-    myUpdateInProgress = false;
+    try {
+      int startLine = myDocument.getLineNumber(event.getOffset());
+      int newEndLine = getAdjustedLineNumber(event.getOffset() + event.getNewLength());
+      invalidateLines(startLine, myDocumentChangeOldEndLine, newEndLine, isSimpleText(event.getNewFragment()));
+    }
+    finally {
+      myUpdateInProgress = false;
+    }
   }
 
   // text for which offset<->logicalColumn conversion is trivial