From 0eb2b7fecd2df87a14707478c5c41831dc0f8f95 Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Mon, 18 Feb 2013 17:51:56 +0100
Subject: [PATCH] track modification stamp to restart the lexer in order to
 avoid unexpected lexer assertions from edited code (EA-30079, EA-43510 )
 review+ CR-IC

---
 .../usageView/src/com/intellij/usages/ChunkExtractor.java    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/platform/usageView/src/com/intellij/usages/ChunkExtractor.java b/platform/usageView/src/com/intellij/usages/ChunkExtractor.java
index f364ea67cfae..4419596eab98 100644
--- a/platform/usageView/src/com/intellij/usages/ChunkExtractor.java
+++ b/platform/usageView/src/com/intellij/usages/ChunkExtractor.java
@@ -62,6 +62,7 @@ public class ChunkExtractor {
   private final EditorColorsScheme myColorsScheme;
 
   private final Document myDocument;
+  private long myDocumentStamp;
   private final SyntaxHighlighter myHighlighter;
 
   private final Lexer myLexer;
@@ -121,6 +122,7 @@ public class ChunkExtractor {
     myHighlighter = highlighter == null ? new PlainSyntaxHighlighter() : highlighter;
     myLexer = myHighlighter.getHighlightingLexer();
     myLexer.start(myDocument.getCharsSequence());
+    myDocumentStamp = myDocument.getModificationStamp();
   }
 
   public static int getStartOffset(final List<RangeMarker> rangeMarkers) {
@@ -183,8 +185,9 @@ public class ChunkExtractor {
     int i = StringUtil.indexOf(chars, '\n', start, end);
     if (i != -1) end = i;
 
-    if (lexer.getTokenStart() > start) {
+    if (lexer.getTokenStart() > start || myDocumentStamp != myDocument.getModificationStamp()) {
       lexer.start(chars);
+      myDocumentStamp = myDocument.getModificationStamp();
     }
     boolean isBeginning = true;